Novel Design of an Integrated Pulp Mill Biorefinery for the ...

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3.4 Fischer-Tropsch synthesis ................................................................................................... 56 3.5 Heat and Power Generation Process Design ................................................................. 58 3.5.1 Heat Recovery System Design .................................................................................. 58 3.5.2 Power Generation Process Design ............................................................................ 59 3.5.3 Design Considerations .............................................................................................. 62 1. Gas Turbine .......................................................................................................................... 62 3.5.4 Design Main Issues ..................................................................................................... 64 3.5.5 Power and Heat Generation Conclusion ..................................................................... 66 4. Design Summary ..................................................................................................................... 67 5. Conclusion ................................................................................................................................ 70 References ..................................................................................................................................... 71 Appendix ....................................................................................................................................... 77 Appendix A ............................................................................................................................... 77 Appendix B: .............................................................................................................................. 79 Composite Fuel Blend to Texaco Gasifier ............................................................................ 79 Coal Requirement from Experimental Syngas Yield ............................................................ 80 Chemrec Gasification Process .............................................................................................. 82 Air Separation Unit Requirements ........................................................................................ 83 Appendix C: Dimethyl Ether Synthesis ............................................................................. 84 Appendix D: FTD Synthesis ............................................................................................... 87 Appendix E: Heat and Power Generation ......................................................................... 95 1. Heat Recovery Calculation ........................................................................................... 95 2. Power Generation from DME Purge Gas ..................................................................... 97 3. Power Generation from FT Purge Gas ........................................................................ 101 4. Power Generation from Steam Turbine ...................................................................... 103 Appendix F: Concept Map .................................................................................................. 105 4
List of Figures Figure 1: Price of wood as a function of transportation distance. .................................................. 9 Figure 2: Chemrec gasification process ........................................................................................ 19 Figure 3: Conceptual diagrams of different types of reactors. ...................................................... 26 Figure 4: Topsøe gas phase technology for large scale DME production. ................................... 27 Figure 5: JFE liquid phase technology for large scale DME production. ..................................... 27 Figure 6: Road load test data comparing engine emissions using diesel and DME. .................... 30 Figure 7: Multi-tubular fixed bed reactor, circulating fluidized bed reactor, ebulating or fixed fluidized bed reactor, slurry-phase bubbling-bed reactor ............................................................. 31 Figure 8: The calculated conversion profiles for LTFT operation with cobalt- and iron- based catalysts. ........................................................................................................................................ 33 Figure 9: Product distribution for different α for the FT synthesis ............................................... 36 Figure 10: FT stepwise growth process. ....................................................................................... 36 Figure 11: Anderson-Schultz-Flory distribution ........................................................................... 37 Figure 12: Equilibrium conversion of synthesis gas. .................................................................... 54 Figure 13: The effect of the H2/CO ratio on DME productivity and materials utilization. ......... 54 Figure 14: Concept of slurry phase rector (JFE Holdings, Inc). ................................................... 55 Figure 15: Conversion and selectivity as a function of H2/CO. ................................................... 55 Figure 16: CO conversion as a function of temperature and pressure. ......................................... 56 Figure 17: FTD production from clean syngas. ............................................................................ 57 Figure 18: The block of heat recovery process design. ................................................................ 58 Figure 19:Chemrec BLGCC recovery island ................................................................................ 59 Figure 20: Schematic of biorefinery DME with a Rankine power system ................................... 60 Figure 21: Schematic of biorefinery for DME with a combined biomass gasifier and gas turbine cycle .............................................................................................................................................. 61 Figure 22: Schematic of biorefinery for DME with a one-pass synthesis design ......................... 61 Figure 24: Power generation with unconverted syngas from FTD synthesis. .............................. 62 Figure 25: Energy and mass flow in the water heater. .................................................................. 65 Figure 26: Carbon cycle analysis of DME and FTD designs. ...................................................... 68 Figure 27: Mass and energy flow of DME design and FTD design. ............................................ 69 5
Page 1 and 2: Novel Design of an Integrated Pulp
Page 3: Table of Contents List of Figures .
Page 7 and 8: 1 Introduction The global transport
Page 9 and 10: 2 Background 2.1 Pulp Mill Backgrou
Page 11 and 12: 2.1.2.2 Chemical Pulping The most c
Page 13 and 14: sodium sulfide and sodium carbonate
Page 15 and 16: process described in the section on
Page 17 and 18: 2.2.1 Low-Temperature Black Liquor
Page 19 and 20: Figure 2: Chemrec gasification proc
Page 21 and 22: Table 3: Average syngas composition
Page 23 and 24: DME than that could be obtained fro
Page 25 and 26: U.S. Patent[58] and European Patent
Page 27 and 28: Figure 4: Topsøe gas phase technol
Page 29 and 30: DME Workshop, Japan (Sept. 7, 2000)
Page 31 and 32: 2.4.1. Fischer-Tropsch Reactors The
Page 33 and 34: kpH 2 pCO Cobalt rate = 2 (2.4.1) (
Page 35 and 36: invention of Fischer-Tropsch in the
Page 37 and 38: Table 7: hydrocarbons and associate
Page 39 and 40: 3 Process Design 3.1 Pulp Mill 3.1.
Page 41 and 42: carbonate is fired in a lime kiln t
Page 43 and 44: lost and the pulp that provides tha
Page 45 and 46: Table 16: General operating paramet
Page 47 and 48: Table 19: Ash analysis of Pittsburg
Page 49 and 50: Table 22: Experimental syngas compo
Page 51 and 52: 3.2.5 Process Options and Flexibili
Page 53 and 54: Nitrogen compounds Nitrogen from th
Page 55 and 56:
3.3.2.3 Reactors A single-step gas
Page 57 and 58:
Table 27: FT-diesel fuel synthesis
Page 59 and 60:
3.5.2 Power Generation Process Desi
Page 61 and 62:
Figure 21: Schematic of biorefinery
Page 63 and 64:
ar) reacts with the fuel in the com
Page 65 and 66:
Figure 25showed the detailed energy
Page 67 and 68:
4. Design Summary The DME design an
Page 69 and 70:
Figure 27: Mass and energy flow of
Page 71 and 72:
References 1. Åhman, M., G. Modig,
Page 73 and 74:
42. R.A. Peascoe, J.R.K., C.R. Hubb
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PerformanceSimulation. 2006, Prince
Page 77 and 78:
Appendix Appendix A MP Steam Demand
Page 79 and 80:
Appendix B: Composite Fuel Blend to
Page 81 and 82:
DME Density = 0.67 kg/L (at 20 °C)
Page 83 and 84:
Air Separation Unit Requirements Ba
Page 85 and 86:
Purge gas: CO conversion is 60%, 40
Page 87 and 88:
Appendix D: FTD Synthesis Two diffe
Page 89 and 90:
Table D.3: The hydrocarbon product
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Figure D.3 Mass and energy balance
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Table D.3 Mass and energy balance o
Page 95 and 96:
Appendix E: Heat and Power Generati
Page 97 and 98:
Energy H2O absorbed MW 46.71 Using
Page 99 and 100:
Combustion 2CO+O2→ 2CO2 + 566 kJ/
Page 101 and 102:
Specific Heat (cp) b kJ/kgK 1.072 E
Page 103 and 104:
Specific Heat of Steam (cp) kJ/kgK
Page 105:
Appendix F: Concept Map 105
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