Fuel-Flexible Gasification-Combustion Technology for Production of H2 and Sequestration-Ready Co2

Abstract

It is expected that in the 21st century the Nation will continue to rely on fossil fuels for electricity, transportation, and chemicals. It will be necessary to improve both the thermodynamic efficiency and environmental impact performance of fossil fuel utilization. General Electric Energy and Environmental Research Corporation (GE-EER) has developed an innovative fuel-flexible Advanced Gasification-Combustion (AGC) concept to produce H 2 and sequestration-ready CO 2 from solid fuels. The AGC module offers potential for reduced cost and increased energy efficiency relative to conventional gasification and combustion systems. GE-EER was awarded a Vision-21 program from U.S. DOE NETL to develop the AGC technology. Work on this three-year program started on October 1, 2000. The project team includes GE-EER, California Energy Commission, Southern Illinois University at Carbondale, and T. R. Miles, Technical Consultants, Inc.In the AGC technology, coal/opportunity fuels and air are simultaneously converted into separate streams of (1) pure hydrogen that can be utilized in fuel cells, (2) sequestration-ready CO 2 , and (3) high temperature/pressure oxygen depleted air to produce electricity in a gas turbine. The process produces near-zero emissions and, based on preliminary modeling work in the first quarter of this program, has an estimated process efficiency of approximately 67% based on electrical and H 2 energy outputs relative to the higher heating value of coal. The three-year R&D program will determine the operating conditions that maximize separation of CO 2 and pollutants from the vent gas, while simultaneously maximizing coal conversion efficiency and hydrogen production. The program integrates lab-, bench-and pilot-scale studies to demonstrate the AGC concept.

Thermodynamic and Experimental Analyses of the Three-Stage Calcium Looping Process

“…A variation of this process, the HyPrRing process, , was developed in Japan for the production of H 2 at high pressures. Several other processes have also been developed to enhance H 2 production using calcium-based sorbents such as the ZECA, Alstom, and GE processes . Shimizu et al, Gupta and Fan, Iyer et al, Wang et al, Sun et al, , Abanades et al, , and Manovic et al applied this concept to the removal of CO 2 from combustion flue gas.…”

Calcium Looping Process for Enhanced Catalytic Hydrogen Production with Integrated Carbon Dioxide and Sulfur Capture

“…A variation of this process, the HyPrRing process, , was developed in Japan for the production of H 2 at high pressures. Several other processes have also been developed to enhance H 2 production using calcium-based sorbents such as the ZECA, Alstom, and GE processes. Shimizu et al, Gupta and Fan, Iyer et al, Sun et al, , Abanades et al, , and Manovic et al have applied this concept to the removal of CO 2 from combustion flue gas.…”

Chemical looping for hydrogen production

“…Figure 15.17 Fuel-flexible advanced gasification-combustion (AGC) process coupling CLC and Ca-looping to obtain a high-pure H 2 stream with CO 2 capture, as conceived by General Electric (Rizeq et al, 2001). Thus, H 2 can be obtained by means of a POX of the fuel.…”

“…The use of Ca-looping to CLR or CLG is being explored to obtain a highly concentrated H 2 stream instead of a H 2 þ CO mixture (Abanades, Murillo, Fern andez, Grasa, & Martínez, 2010;Andrus et al, 2009;Rizeq, Lyon, Zamansky, & Das, 2001;Rydén & Ramos, 2012;Wolf & Yan, 2005). Recently, the use of CaO sorbents to enhance H 2 production from CLR of liquid fuels has been analysed (Dou, Song, Wang, Chen, & Xu, 2014;Pimenidou, Rickett, Dupont, & Twigg, 2010b;Wang & Cao, 2013), but most of studies have been developed for H 2 production from gaseous or solid fuels.…”

“…General Electric developed the advanced gasificationecombustion process involving three pressurized (w2 MPa) fluidized bed reactors and with Fe 2 O 3 as the active material in the oxygen carrier, and CaO the CO 2 acceptor (Rizeq et al, 2001); see Figure 15.17. In this case, the fuel reactor is also the calciner and coal gasification happens in the carbonator.…”