Finding appropriate operating conditions for hydrogen purification and recovery in supercritical water gasification of biomass [An article from: Chemical Engineering Journal]

This digital document is a journal article from Chemical Engineering Journal, published by Elsevier in 2006. The article is delivered in HTML format and is available in your Amazon.com Media Library immediately after purchase. You can view it with any web browser.

Description:
The gas product from biomass gasification in supercritical water contains about 55% H"2 and 33% CO"2 in mole fraction. Others like CH"4 and CO exist in the gas product with less amounts. Hydrogen is the targeted product. Its purification is a very important step. Water is generally used as the solvent to purify the hydrogen by separating CO"2 and other gases from the gas product. The hydrogen purification can be carried out through separators, generally a high-pressure separator followed by low-pressure separators. The operating conditions of temperature, pressure, and the amounts of water used have a significant effect on the efficiency of hydrogen purification. Simulation of hydrogen purification at a wide range of operating conditions has been carried out. The appropriate operating conditions have been indicated, at which, to the greatest extent, the hydrogen produced can be purified and recovered. The results of this work will have a significant contribution to the design of a process of supercritical water gasification of biomass.