Hydrogen production from co-gasification of coal and biomass in supercritical water by continuous flow thermal-catalytic reaction system

2007, Volume 1, Issue 3

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Frontiers in Energy >> 2007, Volume 1, Issue 3 doi: 10.1007/s11708-007-0048-0

Hydrogen production from co-gasification of coal and biomass in supercritical water by continuous flow thermal-catalytic reaction system

1.State Key Lab of Multiphase Flow in Power and Engineering, Xi′an Jiaotong University, Xi′an 710049, China; School of Environmental and Municipal Engineering, Xi′an University of Architecture and Technology, Xi′an 710055, China; 2.State Key Lab of Multiphase Flow in Power and Engineering, Xi′an Jiaotong University, Xi′an 710049, China;

Available online: 2007-09-05

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Abstract

Hydrogen is a clean energy carrier. Converting abundant coal sources and green biomass energy into hydrogen effectively and without any pollution promotes environmental protection. The co-gasification performance of coal and a model compound of biomass, carboxymethylcellulose (CMC) in supercritical water (SCW), were investigated experimentally. The influences of temperature, pressure and concentration on hydrogen production from co-gasification of coal and CMC in SCW under the given conditions (20–25 MPa, 650vH, 15–30 s) are discussed in detail. The experimental results show that H, CO and CH are the main gas products, and the molar fraction of hydrogen reaches in excess of 60%. The higher pressure and higher CMC content facilitate hydrogen production; production is decreased remarkably given a longer residence time.

Keywords

carboxymethylcellulose ; temperature ; co-gasification performance ; Hydrogen ; residence

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