Precombustion decarbonization

Figure 9.1 Basic schematic diagram of (a) postcombustion capture, (b) precombustion decarbonization, and (c) oxy-fuel processes.

H2 separation Synthesis gas C0/H2/H20/C02 H 2 Precombustion decarbonization (WGS), H2 production for fuel cells... 

Precombustion Decarbonization Processes Including Hydrogen and Carbon Dioxide Membrane Separation... 

Figure 9.5 Hydrogen-selective membrane combining steps 1 + 2 + 3 in precombustion decarbonization. Starting from synthesis gas, for example, after gasification of coal, step 2 + 3 may be combined in the membrane unit. After WCS, the membrane unit may perform step 3, only.

Membranes for Oxygen Separation in Precombustion Decarbonization and Oxy-Fuel Processes... 

The potential for carbon capture and sequestration (CCS) and precombustion decarbonization expand possibilities for the sustainable use of conventional fossil energy carbonthis area during the 2009-2015 term may be gasification related. Currently, Task 27 - Near-Term Market Routes to Hydrogen by Co-utilization of Biomass as a Renewable Energy Source with Eossil Euels addresses many of these issues. This task seeks to advance the development... 

State-of-thecirt reports for all three Task 16 subtasks Subtask A on tbe potential for cost reduction of large-scale processing from natural gas with precombustion decarbonization of fossil energy Subtask B on prospects for Hi from biomass from an industry perspective and Subtask C on small-scale reformer tedm[Pg.1174]

Precombustion decarbonization. (PCDC). Reform fuel to make hydrogen and CO2. 

Schematically, CO2 capture can be achieved following three main strategies (Figure 39.1) [12] (1) oxy-combustion (or oxy-fuel combustion) where the fuel combustion is performed with pure or enriched O2 instead of air, so that a CO2/ H2O mixture is produced (2) pre-combustion, where the carbon from the fuel is removed prior to combustion (decarbonization) either as CO2, as coke, or in other forms, and whereby the primary fuel heating value is transformed into H2 through partial oxidation, steam reforming, or autothermal reforming with subsequent water-gas shift (WGS) reaction and (3) post-combustion, where CO2 recovery is performed at the end of pipe from a wet exhaust flue gas, usually at 10-30% (v/v) CO2 concentration. The target separations to achieve in these processes to make them feasible are O2/N2 for oxy-combustion, CO2/H2 for precombustion, and CO2/N2 for post-combustion CO2 capture.

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