Contents - Excel 9 by JKVN5u16

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									Biodiesel Process Version 1.01
 Contents

     Tab


     BD


 GR and MR


     MB

     EB

Authors: Tapasvi, Wiesenborn, Gustafson, North Dakota State University

Questions: send e-mail to d.wiesenborn@ndsu.edu

DISCLAIMER:
iodiesel Process Version 1.01




            Block diagram showing symbols of key units and stream numbering associated with crude oil pretreatment,
            transesterification, ester washing and drying.

            Block diagram showing symbols of key units and stream numbering associated with glycerol recovery and
            methanol recovery.

            Mass balances, input user-selected inputs, oil composition

            Energy balances

thors: Tapasvi, Wiesenborn, Gustafson, North Dakota State University

estions: send e-mail to d.wiesenborn@ndsu.edu

            The model is based upon published literature and common process engineering assumptions. Every effort has
            been made to accurately model the biodiesel process. However, this model is intended only as a demonstration
            of the biodiesel process modeling concept, and has not been fully and systematically tested or checked for errors.
            Neither the authors nor NDSU will be liable for any damages or loss of profits that may result from use of this
            biodiesel process model.
                                                 Biodiesel Production

                                                                                                                 NaOH solution (9.5 wt%) (10)


                                                                                                                 Wash (soft) water (11)
                     Phosphoric acid (3)   Soft water (4)




                                                      Mixing tank     Centrifuge         Degummed     Refining    RT           Centrifuge   Centrifuge
Crude oil                          Mixing tank
            Heater    Heated                          Outstream (5)      (C)               Oil (9)   tank (RT)    Outstream       (F)       outstream (14)
   (1)                                 (B)
             (A)      crude oil                                                                         (E)          (12)
                        (2)


                                                        Gums-water mix (6)
                                                                                                                               Soapstock (13)
                                                                       Gums/Water
                                               Gums (7)                Separation (D)



                                                                             Water (8)
                           Water vapor (16)                                 Methanol (20)                                                                     M

                                                                                       Sodium methoxide catalyst (19)
                                                                                         (10% solution in methanol)

                             Vacuum
                             Oil dryer                                                           CSTR 1 Outstream (21) Separator 1
      Heater   Heater                                                                                                                Ester phase (23)
                                (H)       Hot oil   Surge tank   Refined
14)    (G)     Outstream     35 mm Hg      (17)                  oil (18)                                               (Decanter)
                                                       (I)                                       (Methyl esters +
                (15)         absolute                                                                                      (K)
                                                                                                  glycerol + catalyst +
                             pressure                                       CSTR 1 at 60 C (J)    excess methanol)                                           C



                                                                                                                             Glycerol phase 1 (22)




                                                                                                                                                     Glycerol +




                                                                                                                                                             Gl
                                                                                              Wash water (30)



                                                                                                   Heater
                                                                                                    (O)
 Methanol (25)                                                                                           Wash water (31)

                 Sodium methoxide catalyst (24)




                            CSTR 2 Outstream (26) Separator 2                                       Wash                   Settler   Ester (35)
                                                                Ester phase   Heater   Heater              Washed                                   Heater   Heate
                                                   (Decanter)                                      Columns                 tank
                                                                (28)           (N)     Outstream           Esters (33)                               (R)     Outstr
                            (Methyl esters +          (M)                                            (P)                    (Q)
                                                                                        (29)                                                                  (36)
CSTR 2 at 60 C (L)           glycerol + catalyst +
                             excess methanol)



                                   Glycerol phase 2 (27)

                                                                                                                               Aqueous phase (34)
                                                                                               Waste stream (32)
+ methanol + catalyst


     Collecting
       tank
        (T)

              Glycerol/Aqueous phase (39)
Glycerol refining section
            Water vapor (37)




               Vacuum
             ester dryer
                 (S)           Methyl esters
Heater
              35mm Hg           (Biodiesel)
Outstream
              absolute             (38)
 (36)
              pressure
Glycerol Refining and Methanol Recovery section



 Collecting                                                       Methanol vapors (43)
   tank                                                                                      Condenser
    (T)

      Glycerol/Aqueous phase (39)

                                Methanol saturated vapors
                                                            Methanol recovery
                                                            distillation column
  Heater                               + saturated steam
                                                                    (W)
    (U)                                       (42)


                                                                                           Bottoms (44)
        Heater outstream (40)
                                  Glycerol-alcohol
                                      stripper
                                         (V)
  Super heated steam (41)



                 Hot Glycerine solution (46)
                                                               Glycerine hold tank
                                                                      (Y)



                                                                     Glycerine (47)


                                                                                  Acidulation Reactor (AR)
                                                                                          (Z)




                                                                                           Decanter
                                                                                             (AA)




                                                                                      80% glycerine solution (51)
ery section



           Condenser                          To transesterification reactors (45)
             (X)




         Bottoms (44)




                          HCL(48)


 Acidulation Reactor (AR)
         (Z)


                AR outstream (49)


         Decanter                   Waste (50)
           (AA)                     (FFA/Unreacted oil)




    80% glycerine solution (51)
11/15/2004                                              GROSS MASS BALANCE: BIODIESEL
                                                                  (All flows are in Kilogra

Input transesterification efficiency         98

Input the amount of crude oil (Kg/sec)       100

Input methanol/triglyceride ratio             6

Stream                                       1                   2
Descr.                                      Crude             Heater
                                             Oil             Outstream

Component

Water (w)
Methanol (mt)
Sodium Methoxide (sm)
Crude Oil
      TG (t)                                       96.000      96.000
      FFA (f)                                       0.800       0.800
      Phosphatides (p)                              2.000       2.000
      Others (Unsaponifiable matter) (o)            1.200       1.200
Glycerol (g)
Soaps (s)
Methyl Ester (me)
NaOH (n)
Phosphoric acid (pa)
HCl (h)
Gums (gu)
Steam (st)
NaCl (na)
Total (M)                                      100.000       100.000

Temperature (C)                               20.0              70.0
Average specific heat (Kj/Kg/C)              1.917             1.917
Enthalpy (Kj/Kg) (H)                        38.340            134.190
Mass*Enthalpy (KW) (M*H/sec)               3834.000          13419.000
Phase                                       Liquid             Liquid

Fatty acid composition of oils
Fatty acid                                           C 16      C 16:1
Triglyceride Molecular weight (gm)                807.339     801.288
Composition of the oil(% age)                          11        0
Soybean Oil                                            11        0
Canola Oil                                              4       0.5
Molecular weight fraction                          88.807      0.000
Molecular weight of the oil                         872.869

Components of crude oil
                                                 Soybean Oil        Canola Oil

Triglyceride                                         96.000            97.250
Free fatty acids                                      0.800             0.500
Phosphatides                                          2.000             1.250
Others                                                1.200             1.000



Molecular weights
                                                     g-mole
Molecular weight of oil                             872.869
Molecular weight of methanol                         32.040
Molecular weight of glycerol                         92.100
Molecular weight of methyl esters                   292.296
Molecular weight of sodium methoxide                     54
Molecular weight of water                                18
Molecular weight of NaOH                                 40
Molecular weight of NaCL                               58.5
Molecular weight of HCL                                36.5

Fatty acid                                             C 16             C 16:1
Molecular weight (g-mole)                             256.4              254.4
Soybean oil free fatty acid M.W. (g-mole)            10.256              1.272
Canola oil free fatty acid M.W. (g-mole)             28.204                  0

Soy FFA M.W (g-mole)                                 278.22
Canola FFA M.W (g-mole)                             281.733
Molecular weight of the FFA (g-mole)                 278.22
Molecular weight of soap (g-mole)                   278.242

Specific heat                                       Kj/Kg/C

Soybean oil/ Soy biodiesel                            1.917
Canola Oil/Canola biodiesel                           1.913
Oil/Biodiesel                                         1.917

Methanol                                               2.55
Glycerol                                               2.32
Water                                                 4.186

Reactions involved
FFA-NaOH (Alkali refining)                  RCOOH + NaOH

Amount of soap produced                         0.792062627
Amount of water produced                        0.051240026
Amount of sodium hydroxide consumed             0.113866724 (99% FFA removal)
FFA-Sodium methoxide (CSTR 1)                RCOOH + NaOCH3

Amount of soap produced                           0.008000633
Amount of methanol produced in CSTR 1             0.000921285
Amount of sodium methoxide consumed               0.001552728

Sodium methoxide-HCL (Acidulation reactor)   NaOCH3 + HCL

Amount of methanol produced                       0.638118133
Amount of sodium chloride produced                0.638118133
Amount of hydrogen chloride consumed              0.726944815

Soap-HCL (Acidulation reactor)               RCOONa + HCL

Amount of FFA produced                                   0.008
Amount of sodium chloride produced                0.001682122
Amount of hydrogen chloride consumed              0.001049529
MASS BALANCE: BIODIESEL PRODUCTION PROCESS
    (All flows are in Kilograms per day)




                 3                4
             Phosphoric          Soft
                acid             water
              solution


               0.015             1.500




               0.085




               0.100             1.500




                          C 18     C 18:1
                       891.501    885.453
                             4         23
                             4         23
                             2         60
                        35.660    203.654
    C 18              C 18:1
    284.4              282.4
    5.688             169.44
   11.376             64.952




RCOONa + H2O




    0.115016893 (100% FFA removal)
RCOONa + CH3OH




 CH3OH + NaCL




 RCOOH + NaCL
UCTION PROCESS




                5              6            7           8                9
           Mixing tank     Gums-water     Gums         Water         Degummed
           Outstream          mix                                        Oil



              1.515          1.507                     1.507           0.008



             96.000          0.480        0.480                        95.520
              0.800                                                     0.800
              0.000                                                     0.000
              1.200                                                     1.200




              2.085          2.085        2.085



            101.600          4.072        2.565        1.507          97.528

                                                                         20.0
                                                                        1.917
                                                                       38.340
                                                                      3739.207
                                                                       Liquid




                  C 18:2         C 18:3        C 20           C 22           C 22:1
                 879.405        873.357     975.678       1059.828         1053.798
                      54              8            0             0                 0
                      54              8            0             0                 0
                      20           10.5          1.5             0               1.5
                 474.879         69.869       0.000          0.000            0.000
                    C 18:2   C 18:3     C 20    C 22   C 22:1
                     280.4    278.4    312.5   340.5    338.5
                     56.08   29.232   4.6875       0   5.0775
                   151.416   22.272        0       0        0




00% FFA removal)
   10            11            12          13         14
 NaOH           Wash      Refining tank   Waste    Centrifuge
Solution        water      Outstream               Outstream



 2.334          15.000       17.393       17.306     0.087



                             95.520       2.000     93.520
                              0.008                  0.008
                              0.000                  0.000
                              1.200       0.030      1.170

                             0.792        0.792

 0.245                       0.131        0.131




2.579          15.000      115.044        20.259    94.785

   20.0           20.0        70.0                    70.0
  4.184          4.186       2.262                   1.919
 83.680         83.720      158.362                 134.336
215.794        1255.800    18218.573               12733.007
 Liquid         Liquid       Liquid                  Liquid




        C 24
    1143.996
           0
           0
           0
       0.000
 C 24   M.W of 1 kg-mole
368.6
    0            0.281733
    0             0.27822
   15           16           17           18            19
 Heater     Water vapor    Hot Oil    Refined Oil    Catalyst
Outstream                             recovered 2   in CSTR 1



  0.087        0.087
                                                      8.417
                                                      0.935

 93.520                    93.520       93.520
  0.008                     0.008        0.008
  0.000                     0.000        0.000
  1.170                     1.170        1.170




 94.785       0.087       94.698       94.698        9.352

   90.0          90.0        90.0         20.0          20.0
  1.919         1.940       1.917        1.917         2.550
 172.717      174.600      172.530      38.340        51.000
16371.008      15.184     16338.246    3630.721      476.952
  Liquid       Vapor        Liquid      Liquid        Liquid
    20         21              22              23            24          25
 Methanol    CSTR 1     Glycerol phase 1   Ester phase    Catalyst    Methanol
in CSTR 1   Outstream                                    in CSTR 2   in CSTR 2




 12.180      11.655          6.993            4.662        1.263       1.827
              0.935          0.935                         0.140

             14.028                          14.028
              0.000                           0.000
              0.000                           0.000
              1.170                           1.170
              8.388          8.388
              0.008          0.001            0.007
             79.858                          79.858




12.180      116.042         16.317          99.725        1.403       1.827

    20.0       60.0                           55.0          20.0        20.0
   2.550      2.015                          1.947         2.550       2.550
  51.000     120.888                        107.063       51.000      51.000
 621.179    14028.121                      10676.846      71.543      93.177
  Liquid      Liquid                         Liquid       Liquid      Liquid
   26              27            28           29          30            31
 CSTR 2     Glycerol phase 2 Ester phase    Heater     Wash water    Heater
Outstream                                  Outstream                outstream



                                                         18.414      18.414
  6.413          3.848          2.565        2.565
                 0.140

  0.281                         0.281        0.281
  0.000                         0.000        0.000
  0.000                         0.000        0.000
  1.170                         1.170        1.170
  1.283          1.283
  0.007          0.001          0.006        0.006
 92.072                        92.072       92.072




101.225         5.271          96.094       96.094      18.414       18.414

   60.0                          20.0         70.0         20.0        70.0
  1.962                         1.934        1.934        4.186       4.186
 117.733                       38.678       135.373      83.720      293.020
11917.472                     3716.711     13008.490    1541.648    5395.769
  Liquid                       Liquid        Liquid      Liquid       Liquid
     32          33          34            35          36
Waste stream   Washed   Aqueous phase    Esters      Heater
               Esters                               Outstream



   16.573       1.841       1.749         0.092       0.092
    2.565


                0.281                     0.281       0.281
                0.000                     0.000       0.000
                0.000                     0.000       0.000
                1.170                     1.170       1.170

   0.006
               92.072                    92.072      92.072




  19.144       95.364      1.749        93.614       93.614

                                           60.0         95
                                          1.890       1.890
                                         113.372     179.505
                                        10613.211   16804.250
                                          Liquid      Liquid
    37             38                39             40            41
Water vapor   Methyl esters   Glycerol/Aqueous    Heater     Super-heated
               (Biodiesel)          phase        Outstream      Steam



   0.092                           18.322         18.322
                                   13.406         13.406
                                    1.075          1.075

                 0.281
                 0.000
                 0.000
                 1.170
                                   9.670           9.670
                                   0.008           0.008
                 92.072




                                                                80.266

  0.092         93.522            42.482          42.482       80.266

     95.0         95.0               20.0           64.5        250.0
    1.940        1.917              3.203          3.203
  184.300       182.115            64.063         206.602      2973.870
   16.969      17031.805          2721.493       8776.814     238700.818
   Vapor         Liquid            Liquid          Liquid       Vapor
      42            43        44         45         46          47
Methanol-Steam   Methanol   Bottoms   Methanol      Hot      Glycerine
   Vapors         Vapors                         glycerine
  Saturated                                      solution


    18.322                  18.322
    13.406        13.339     0.067     13.339
                                                  1.075        1.075




                                                  9.670        9.670
                                                  0.008        0.008




    80.266

   111.994       13.339     18.389    13.339     10.754      10.754

    100.08                                         100.08
                                                    2.343
   3430.190                                       234.467
  279468.622                                     2521.414
    Vapor                                          Liquid
 48         49              50             51
HCL     Acidulation       Waste       Glycerine
          reactor                     o
                    (FFA/Unreacted Oil) utstream
        outstream


4.570     4.570
          0.638                         0.638



          0.008            0.008


          9.670                         9.670




0.807     0.079



          0.640
5.377    15.605           0.008        10.308
Energy Balance




Steam (Kg/sec)




Energy Balance

Heat energy required (Q) (KW)
                           (Kcal/sec)

Evaporation energy of the saturated steam (Kj/Kg) [hg-hl]
(Saturated steam at 180 C, 150 psi pressure)
(Difference between steam and condensate)
Available energy from the super-heated steam (Kj/Kg) [hsh-hg]
(3 mbar gauge pressure, 250 C)


Latent heat of vaporization
Water at 100.084 C
Methanol at 64.5 C

Methanol Distillation Column Reboiler duty           (KJ)
(Adapted from NREL report)                          (Kcal)
(53,676 Kcal per 1000 kg biodiesel produced)
                  Heater (A)


                     4.757




M1H1                                          M2H2




                         Q




                M1H1 + Q = M2H2

                   9585.000
                    2290.87

                    2015.00


                    717.43
       (Saturation temperature = 100.084 C)


                     Kj/kg
                     2256.44
                     1008.00

                    21003.26
                     5019.90
               Retention tank (E)


                       6.455
                       M11H11




 M9H9                                      M12H12
M10H10



                          Q




         M9H9 + M10H10 + M11H11 + Q = M12H12

                    13007.771
                     3108.93
            Heater (G)


               1.805




                                        M
M14H14                         M15H15
                                        M




                 Q




         M14H14 + Q = M15H15

             3638.002
              869.50
                     CSTR 1 (J)


                        4.615

                      M20H20




M18H18                                             M
                                          M21H21
M19H19                                             M




                         Q




         M18H18 + M19H19 + M20H20 + Q = M21H21

                      9299.269
                       2222.58
                CSTR 2 (L)


                   0.534

                     M25H25




M23H23
                                        M26H26
M24H24




                       Q




    M23H23 + M24H24 + M25H25 + Q = M26H26

                 1075.906
                  257.15
                   #REF!
                 Heater (N)


                    4.611




26                                  M29H29
     M28H28




                       Q




              M28H28 + Q = M29H29

                  9291.779
                   2220.79
            Heater (O)


               1.913




                               M31H31
M30H30




                  Q




         M30H30 + Q = M31H31

             3854.121
              921.16
            Heater (R)


               5.267




M35H35                         M36H36




                  Q




         M35H35 + Q = M36H36

            10613.211
             2536.62
            Heater (U)


               3.005




                               M40H40   M
M39H39




                 Q




         M39H39 + Q = M40H40

             6055.322
              1447.26
           Glycerol-alcohol stripper (V)


                        80.266

                         M42H42




M40H40                                      M46H46
M41H41




         M40H40 + M41H41 (=Q) = M42H42 + M46H46

                      43289.218
                       10346.37
  Satuated steam required (Kg)




            43.386


Super-heated steam required (Kg)



            80.266

								
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