Hydrogen Production from Co-Gasification of
Coal and Biomass in SupercriticalWater by Continuous Flow Thermal-Catalytic Reaction
System
Yan Qiuhui,Guo Liejin,Liang Xing, Zhang Ximin
(State Key Laboratory of Multiphase Flow in Power Engineering, Xi'an Jiaotong University,
Xi'an 710049, China)
Abstract: Hydrogen is a clean energy carrier without pollution. It is significant for
energy source cleanability and environmental protection to convert the abundant coal
sources and green biomass energy into hydrogen effectively and pollution-freely. As a test
sample of biomass in supercritical water (SCW), the co-gasification performance of coal
and carboxymethylcellulose (CMC) is 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, 650 ¡æ, 15-30 s) are discussed
in detail. The experimental results show that H2, CO2 and CH4
are the main product gases, and the molar fraction of hydrogen reaches in excess of 60%.
The higher pressure and higher CMC content facilitate hydrogen production, but the
production is decreased remarkably in longer residence time.
Keywords: hydrogen production; coal; CMC; supercritical water; co-gasification