ASPEN simulation of the SNG production process in an indirect coal-liquefaction plant

Bistline, J E; Shafer, T B

doi:10.2172/5010680

Title: ASPEN simulation of the SNG production process in an indirect coal-liquefaction plant

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Abstract

The synthetic natural gas (SNG) production process (methanation, CO-shift, and hydrogen removal) in an indirect coal-liquefaction plant was simulated using the Advanced System for Process Engineering (ASPEN). The simulation of the methanation unit agreed to within 12% of Fluor's design for converting carbon monoxide and carbon dioxide. A parametric study examined the effect of four important operating parameters on product composition, process thermal efficiency, and outlet temperature from the second methanation reactor. The molar split of gas feed to the CO-shift unit before methanation was varied from 0.2 to 0.6; variations of molar recycle ratio (0.01 - 0.67), molar steam-to-feed ratio (0.04 - 0.19), and feed temperature (478 - 533 K, 400-500/sup 0/F) to the first methanation reactor were also studied. A 50%-lower split improved thermal efficiency by 6%, but the mole % hydrogen and carbon monoxide in the product SNG required to meet pipeline-quality standards and temperature constraints were not met. Increasing the steam-to-feed ratio from 0.04 to 0.19 improved product quality but decreased thermal efficiency by 8%. By decreasing the feed temperature from 533 to 477 K (500 to 400/sup 0/F), product specifications and temperature constraints were met with no effect on thermal efficiency. However, it may bemore »« less

Authors:: Bistline, J E; Shafer, T B

Publication Date:: Sun Aug 01 00:00:00 EDT 1982

Research Org.:: Massachusetts Inst. of Tech., Oak Ridge, TN (USA). School of Chemical Engineering Practice

Sponsoring Org.:: USDOE

OSTI Identifier:: 5010680

Report Number(s):: ORNL/MIT-352
ON: DE82021107

DOE Contract Number:: W-7405-ENG-26

Resource Type:: Technical Report

Resource Relation:: Other Information: Portions of document are illegible

Country of Publication:: United States

Language:: English

Subject:: 01 COAL, LIGNITE, AND PEAT; COAL GASIFICATION; COMPUTER CALCULATIONS; COAL GASIFICATION PLANTS; COMPUTER-AIDED DESIGN; METHANATION; OPTIMIZATION; SIMULATION; COAL LIQUEFACTION; DEPOSITION; FLOWSHEETS; HYDROGEN; LURGI PROCESS; MATHEMATICAL MODELS; REMOVAL; SHIFT PROCESSES; SYNTHESIS GAS; THERMAL EFFICIENCY; CHEMICAL REACTIONS; DIAGRAMS; EFFICIENCY; ELEMENTS; FLUIDS; GASES; GASIFICATION; INDUSTRIAL PLANTS; LIQUEFACTION; NONMETALS; THERMOCHEMICAL PROCESSES; 010405* - Coal, Lignite, & Peat- Hydrogenation & Liquefaction

Citation Formats


                    Bistline, J E, and Shafer, T B. ASPEN simulation of the SNG production process in an indirect coal-liquefaction plant.  United States: N. p., 1982. 
        Web.  doi:10.2172/5010680.

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                    Bistline, J E, & Shafer, T B. ASPEN simulation of the SNG production process in an indirect coal-liquefaction plant.  United States.  https://doi.org/10.2172/5010680

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                    Bistline, J E, and Shafer, T B. 1982.  
        "ASPEN simulation of the SNG production process in an indirect coal-liquefaction plant".  United States.  https://doi.org/10.2172/5010680.  https://www.osti.gov/servlets/purl/5010680.

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@article{osti_5010680,

  title        = {ASPEN simulation of the SNG production process in an indirect coal-liquefaction plant},

  author       = {Bistline, J E and Shafer, T B},

  abstractNote = {The synthetic natural gas (SNG) production process (methanation, CO-shift, and hydrogen removal) in an indirect coal-liquefaction plant was simulated using the Advanced System for Process Engineering (ASPEN). The simulation of the methanation unit agreed to within 12% of Fluor's design for converting carbon monoxide and carbon dioxide. A parametric study examined the effect of four important operating parameters on product composition, process thermal efficiency, and outlet temperature from the second methanation reactor. The molar split of gas feed to the CO-shift unit before methanation was varied from 0.2 to 0.6; variations of molar recycle ratio (0.01 - 0.67), molar steam-to-feed ratio (0.04 - 0.19), and feed temperature (478 - 533 K, 400-500/sup 0/F) to the first methanation reactor were also studied. A 50%-lower split improved thermal efficiency by 6%, but the mole % hydrogen and carbon monoxide in the product SNG required to meet pipeline-quality standards and temperature constraints were not met. Increasing the steam-to-feed ratio from 0.04 to 0.19 improved product quality but decreased thermal efficiency by 8%. By decreasing the feed temperature from 533 to 477 K (500 to 400/sup 0/F), product specifications and temperature constraints were met with no effect on thermal efficiency. However, it may be impractical to operate the reactor at 477 K (400/sup 0/F) because the kinetics are too slow. Increasing the recycle ratio from 0.4 to 0.67 had no effect on thermal efficiency, and temperature constraints and product specifications were met. The SNG production process should be optimized at recycle ratios above 0.67.},

  doi          = {10.2172/5010680},

  url          = {https://www.osti.gov/biblio/5010680},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Sun Aug 01 00:00:00 EDT 1982},

  month        = {Sun Aug 01 00:00:00 EDT 1982}

}

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