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Title: Exxon catalytic coal gasification process development program. Quarterly technical progress report, July 1-September 30, 1978

Abstract

This report covers the activities for the Exxon Catalytic Coal Gasification Development Program during the quarter from July 1-September 30, 1978. The separation of the char-lime residue from the recovered potassium solution in the catalyst recovery system has been identified as a troublesome step in pilot plant operations. Many of the char-lime particles are smaller than 10 microns, and the effective density of the char particles is close to that of the recovered potassium solution. Promising approaches for improving this separation have been identified. The present kinetic model for catalytic gasification is based almost entirely on data from devolatilized coal at 1300/sup 0/F and some limited data at 1200/sup 0/F. Plans have been made to expand the data base to include the gasification kinetics of steady state char from the fluid bed gasifier (FBG) to determine the effect of carbon conversion on reaction rate and to better define the effect of temperature. Engineering cost reduction studies have identified a potential economic incentive to reduce the methane content of the recycle gas stream below the 10% CH/sub 4/ level in the current study. This step would require more cryogenic refrigeration but would significantly reduce the amount of recycle gas, reduce themore » offsite stream required, and reduce the gas feed to acid gas recovery. A more detailed study is planned. An additional incentive study has begun to determine the potential for a cryogenic separation system to remove the acid gases from the product gas. Since the acid gas separation system makes up about 15% of the gas cost, savings here could be very beneficial.« less

Publication Date:
Research Org.:
Exxon Research and Engineering Co., Baytown, TX (USA)
OSTI Identifier:
5123797
Report Number(s):
FE-2777-1
DOE Contract Number:  
ET-78-C-01-2777
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; CATALYSTS; RECOVERY; EXXON GASIFICATION PROCESS; ENGINEERING; MATHEMATICAL MODELS; RESEARCH PROGRAMS; BENCH-SCALE EXPERIMENTS; COAL GASIFICATION; FUEL GAS; METHANE; RECYCLING; REMOVAL; ALKANES; FLUIDS; FUELS; GAS FUELS; GASES; GASIFICATION; HYDROCARBONS; ORGANIC COMPOUNDS; THERMOCHEMICAL PROCESSES; 010404* - Coal, Lignite, & Peat- Gasification

Citation Formats

. Exxon catalytic coal gasification process development program. Quarterly technical progress report, July 1-September 30, 1978. United States: N. p., 1978. Web. doi:10.2172/5123797.
. Exxon catalytic coal gasification process development program. Quarterly technical progress report, July 1-September 30, 1978. United States. https://doi.org/10.2172/5123797
. 1978. "Exxon catalytic coal gasification process development program. Quarterly technical progress report, July 1-September 30, 1978". United States. https://doi.org/10.2172/5123797. https://www.osti.gov/servlets/purl/5123797.
@article{osti_5123797,
title = {Exxon catalytic coal gasification process development program. Quarterly technical progress report, July 1-September 30, 1978},
author = {},
abstractNote = {This report covers the activities for the Exxon Catalytic Coal Gasification Development Program during the quarter from July 1-September 30, 1978. The separation of the char-lime residue from the recovered potassium solution in the catalyst recovery system has been identified as a troublesome step in pilot plant operations. Many of the char-lime particles are smaller than 10 microns, and the effective density of the char particles is close to that of the recovered potassium solution. Promising approaches for improving this separation have been identified. The present kinetic model for catalytic gasification is based almost entirely on data from devolatilized coal at 1300/sup 0/F and some limited data at 1200/sup 0/F. Plans have been made to expand the data base to include the gasification kinetics of steady state char from the fluid bed gasifier (FBG) to determine the effect of carbon conversion on reaction rate and to better define the effect of temperature. Engineering cost reduction studies have identified a potential economic incentive to reduce the methane content of the recycle gas stream below the 10% CH/sub 4/ level in the current study. This step would require more cryogenic refrigeration but would significantly reduce the amount of recycle gas, reduce the offsite stream required, and reduce the gas feed to acid gas recovery. A more detailed study is planned. An additional incentive study has begun to determine the potential for a cryogenic separation system to remove the acid gases from the product gas. Since the acid gas separation system makes up about 15% of the gas cost, savings here could be very beneficial.},
doi = {10.2172/5123797},
url = {https://www.osti.gov/biblio/5123797}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Nov 01 00:00:00 EST 1978},
month = {Wed Nov 01 00:00:00 EST 1978}
}