可再生能源2017，Vol.35Issue(4)：502-507,6.
不同钙基吸收剂对玉米秸秆热解气化制氢特性的影响
Effects of different calcium-based absorbents on hydrogen production of corn stalk pyrolysis-gasification
摘要
Abstract
The aim of this study is to reveal the influencing mechanism of different calcium-based absorbents on the hydrogen production of biomass pyrolysis-gasification.Using corn stalk as feedstock,the effects of several calcium-based absorbents on the hydrogen production characteristics were investigated in a two-stage fixed-bed biomass pyrolysis-gasification system.The results indicated that the addition of calcined limestone,calcined CaCO3 and calcined dolomite could effectively absorb the CO2 generated during the pyrolysis-gasification of corn stalk,which thus shifted the chemical equilibrium of water gas shift (WGS) reaction to produce more H2.Meanwhile,it was found that the main components CaO in the absorbents could also catalyze the cracking and steam gasification of pyrolytic volatiles as well as the WGS reaction,hence significantly increased the volume concentration and yield of H2 in the product gas.Furthermore,the magnesium component in the calcined dolomite was proved to have further catalytic effect on the gasification process as well as the CO2 absorption reaction to achieve a higher H2 concentration of 71.8％ and yield of 224.5 mL/(g db biomass).关键词
玉米秸秆/热解气化/制氢/煅烧石灰石/煅烧碳酸钙/煅烧白云石Key words
corn stalk/pyrolysis-gasification/H2 production/calcined limestone/calcined CaCO3/calcined dolomite分类
能源科技引用本文复制引用
李斌,韩旭,陈义龙,魏良元,杨海平,陈汉平..不同钙基吸收剂对玉米秸秆热解气化制氢特性的影响[J].可再生能源,2017,35(4):502-507,6.基金项目
生物质热化学技术国家重点实验室开放基金项目 （）
国家自然科学基金项目(51306066). （51306066）
