摘要
The conversion of biomass into hydrogen-rich gas provides a competitive means for producing clean energy and chemicals from renewable resources.Based on the principle of Gibbs free energy minimization, a new method was presented with better effectiveness and simplicity to be used for the prediction of chemical equilibrium composition of hydrogen production by biomass gasification in supercritical water(SCW).Applying this method to analyzing the process of glucose gasification in SCW, it was found that the product gas consisted primarily of hydrogen and carbon dioxide as well as a small amount of methane and carbon monoxide.The gas yield was strongly affected by reaction temperature and feedstock concentration and less affected by reaction pressure in the following range:temperature 623—1073 K,pressure 22.5—35 MPa,and concentration 0.1—0.8 mol·L -1 .The hydrogen production in product gas increased with the increase of temperature and decreased with the increase of concentration.
The conversion of biomass into hydrogen-rich gas provides a competitive means for producing clean energy and chemicals from renewable resources. Based on the principle of Gibbs free energy minimization, a new method was presented with better effectiveness and simplicity to be used for the prediction of chemical equilibrium composition of hydrogen production by biomass gasification in supercritical water (SCW). Applying this method to analyzing the process of glucose gasification in SCW, it was found that the product gas consisted primarily of hydrogen and carbon dioxide as well as a small amount of methane and carbon monoxide. The gas yield was strongly affected by reaction temperature and feedstock concentration and less affected by reaction pressure in the following range: temperature 623-1073 K, pressure 22.5-35 MPa, and concentration 0.1-0.8 mol·L-1. The hydrogen production in product gas increased with the increase of temperature and decreased with the increase of concentration.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2004年第11期1916-1920,共5页
CIESC Journal
基金
国家重点基础研究发展规划项目(No 2 0 0 3CB2 14 5 0 0 )资助
关键词
超临界水
制氢
化学平衡
葡萄糖
热力学
Biomass
Carbon dioxide
Carbon monoxide
Composition
Concentration (process)
Gasification
Gibbs free energy
Glucose
Mathematical models
Phase equilibria
Production
Supercritical fluids
Thermodynamics
Water
