EXPERIMENTAL STUDY ON METAL-CATALYZED CO2 GASIFICATION OF BIOMASS CHARS
Effects of alkali (K, Na), alkaline earth (Ca, Mg) and transition (Fe) metals on CO2 gasification reactivity of fir char were investigated by temperature-programmed thermogravimetry on a STA409 TGA. It was shown that the char gasification reactivity was improved through the addition of metal catalysts, and the catalytic effect of the five metals on the char gasification reactivity had the same sequence of K> Na>Ca>Fe>Mg. X-ray diffractometry (XRD) and scanning electron microscopy (SEM) were employed to investigate carbonization degree, crystal structure and morphology of char samples. It was indicated by XRD that Na and Ca were easier to form crystal structure compared with other metals, and that Mg enhanced the degree of carbon structure ordering. Results of SEM analysis showed that there were many spots on the surface of the char samples impregnated with metal catalyst, which played a key role in catalytic gasification process. Moreover, loose patch structure was observed on the surfaces of both K-Char and Na-Char.
Fir chars CO2 gasification metal catalysts XRD SEM
Yan-qin HUANG Xiu-li YIN Chuang-zhi WU Jian-jun XIE Cong-wei WANG Long-long MAI
The Renewable Energy and Gas Hydrate Key Laboratory of CAS,Guangzhou Institute of Energy Conversion, The Renewable Energy and Gas Hydrate Key Laboratory of CAS,Guangzhou Institute of Energy Conversion,
国际会议
广州
英文
1004-1009
2008-12-03（万方平台首次上网日期，不代表论文的发表时间）