Hydrogen production from catalytic gasification of cellulose in supercritical water [An article from: Chemical Engineering Journal]

This digital document is a journal article from Chemical Engineering Journal, published by Elsevier in 2005. 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:
Interests in large-scale use of biomass for energy and in hydrogen are motivated largely by global environmental issues. Cellulose and sawdust were gasified in supercritical water to produce hydrogen-rich gas in this paper, and Ru/C, Pd/C, CeO"2 paticles, nano-CeO"2 and nano-(CeZr)"xO"2 were selected as catalysts. The experimental results showed that the catalytic activities were Ru/C>Pd/C>nano-(CeZr)"xO"2>nano-CeO"2>CeO"2 particle in turn. Low-concentration sodium carboxymethylcellulose (CMC) (2-3wt.%) was mixed with particulate biomass and water to form a uniform and stable viscous paste which can be efficiently gasified. The 10wt.% cellulose or sawdust with CMC can be gasified near completely with Ru/C catalyst to produce 2-4g hydrogen yield and 11-15g potential hydrogen yield per 100g feedstock at the condition of 500^oC, 27MPa, 20min residence time in supercritical water.