Advanced Gasification and Novel Transformational Coal Conversion Technologies Development: Final Technical Report

A review on dual-phase oxygen transport membranes: from fundamentals to commercial deployment

“…During the rst 1000 h H 2 /N 2 was fed to the fuel side to obtain a baseline without interference of the methane reforming reactions and then the membrane was stabilised in reforming mode. A mix of 62.9% H 2 , 11.3% CH 4 and 25.7% H 2 O was fed for 4000 h at 950 C. 389 Fig. 24a shows the normalized oxygen ux, where '1' is the oxygen ux targeted by Praxair, Inc. 389 As observed, the operation of the membrane is very stable during the test.…”

“…Syngas mixtures with the proper H 2 /CO ratio can be used subsequently in catalytic reactions to generate liquid fuels, as well as oxygenated organic compounds, such as methanol, acetic acid, and dimethyl ether (DME). 1,24,[387][388][389][390] The concept for an OTM system is shown in Fig. 17 and is based on the integration of steam methane reforming (SMR), auto-thermal reforming (ATR) and air separation unit (ASU) processes in a single reactor working between 900 C and 1050 C at 27.5 bar.…”

“…When supplied with CH 4 conversion rates of >99% and 70 vol% H 2 content in the syngas with a H 2 /CO ratio of 3.4 can be obtained. 389 6.1.1 OTM system arrangement. Fig.…”

“…The syngas is enhanced by an OTM reforming system (NG ¼ natural gas, FT ¼ Fischer Tropsch, DME ¼ dimethyl ether). 389 Fig. 17 OTM combined reformer for IGCC power systems concept developed by Praxair, Inc. 252 which also includes the gas manifolds, from the 'panel array' assembly.…”

“…The sintered tubes have thickness of approximately 1 mm and are designed to work at 29 bar and 1000 C; however, they are have demonstrated the ability to withstand burst pressures in excess of 100 bar. 389,393 A schematic of the architecture of the membrane is shown in Fig. 21.…”