Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Integration of ITM Oxygen with Coal Gasification, Fischer-Tropsch Synthesis Liquid Fuels Production

IP.com Disclosure Number: IPCOM000019435D
Publication Date: 2003-Sep-12
Document File: 2 page(s) / 27K

Publishing Venue

The IP.com Prior Art Database

Abstract

Oxygen can be recovered from air at high temperatures by passing hot, oxygen-containing gas, preferably air, over non-porous, solid electrolyte ceramic membranes. These membranes, known in the art generically as ion transport membranes (ITMs), utilize an electrochemical potential difference across the membrane to cause oxygen ions to migrate through the membrane. Membranes can be fabricated as tubes or flat plates that are arranged in modules for efficient contact with the hot feed air. High-purity oxygen permeate and nitrogen-enriched non-permeate products are withdrawn from the modules. The oxygen can also be produced by the ITM device at pressures exceeding the feed air pressure. A comprehensive review of ion transport membranes is given by J. D. Wright and R. J. Copeland in Report No. TDA-GRI-90/0303 prepared for the Gas Research Institute, September 1990.

This text was extracted from a Microsoft Word document.
This is the abbreviated version, containing approximately 52% of the total text.

Integration of ITM Oxygen with Coal Gasification, Fischer-Tropsch Synthesis Liquid Fuels Production

         Oxygen can be recovered from air at high temperatures by passing hot, oxygen-containing gas, preferably air, over non-porous, solid electrolyte ceramic membranes. These membranes, known in the art generically as ion transport membranes (ITMs), utilize an electr

ica

ochemical potential difference across the membrane to cause oxygen ions to migrate through the membrane. Membranes can be fabricated as tubes or flat plates that are arranged in modules for efficient contact with the hot feed air. High-purity oxygen permeate and nitrogen-enriched non-permeate products are withdrawn from the modules. The oxygen can also be produced by the ITM device at pressures exceeding the feed air pressure. A comprehensive review of ion transport membranes is given by J. D. Wright and R. J. Copeland in Report No. TDA-GRI-90/0303 prepared for the Gas Research Institute, September 1990.

        

CRADA REPORT I-CASE 2-PRELIMINARY REPORT ON ITM - FISCHER-TROPSCH SYNTHESIS INTEGRATION

Objective

ITM oxygen technology can be integrated with a coal gasification, Fischer-Tropsch liquid fuelsproduction process. The integration can be realized either through oxygen production exclusively by ITM technology or through a hybrid ITM-cryogenic air separation process. The advantage of one over the other will be determined by the ability to export power generated by the ITM. Either integration has a power use advantage over conventional air separation technology (ASU).

Base case studies have shown that a Coal Gasification - Fisher-Tropsch Synthesis direct liquefaction plant (CTL process) processing 18,592 tons per day (dry basis) of coal requires a net import of 54.4 MW of power when the oxygen used by the gasifier is provided by an ASU. The studies also assumed internal power generation fueled by purge gas from the gasifier. The large amount of high pressure steam generated by the gasifier is used primarily to drive the cryogenic ASU (approximately 250 MW power equivalent). An Autothermal Reforming (ATR) unit is necessary to reduce the concentration of the lower hydrocarbons in the feed to the Fischer-Tropsch reactor and to increase the yield to the desired liquid product. In addition, the unconverted gas must be recycled to increase recovery.

Initial studies

The objective of this report is to provide DOE FETC with the result that we at APCI obtained from analysis of the integration of the ITM oxygen - power cogeneration slvs tem with the coal gasification-Fischer-Tropsch synthesis-liquid fuel production process, especially with respect to the energy balance within the process plant, and to identify the work necessary for the next phase of ITM-coal gasification-Fischer Tropsch synthesis for liquid fuels production study.

of the ITM integration proposals assumed that the ITM oxygen would be produced at a rate of 16,100 tons/day for a CTL process that used the same amount of coal as the ASU-f...