title: Effects of metal catalysts on CO2 gasification reactivity of biomass char.
abstract: The effects of five metal catalysts (K, Na, Ca, Mg, and Fe) on CO(2) gasification reactivity of fir char were studied using thermal gravimetric analysis. The degree of carbonization, crystal structure and morphology of char samples was characterized by X-ray diffractometry (XRD) and scanning electron microscopy (SEM). The CO(2) gasification reactivity of fir char was improved through the addition of metal catalysts, in the order K>Na>Ca>Fe>Mg. XRD analysis indicated that Na and Ca improved the formation of crystal structure, and that Mg enhanced the degree of carbon structure ordering. SEM analysis showed that spotted activation centers were distributed on the surface of char samples impregnated with catalysts. Moreover, a loose flake structure was observed on the surface of both K-char and Na-char. Finally, the kinetic parameters of CO(2) gasification of char samples were calculated mathematically.
authors.affiliation: The Renewable Energy and Gas Hydrate Key Laboratory of CAS, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, 510640, China.
authors.forename: Yanqin
authors.initials: Y
authors.lastname: Huang
authors.forename: Xiuli
authors.initials: X
authors.lastname: Yin
authors.forename: Chuangzhi
authors.initials: C
authors.lastname: Wu
authors.forename: Congwei
authors.initials: C
authors.lastname: Wang
authors.forename: Jianjun
authors.initials: J
authors.lastname: Xie
authors.forename: Zhaoqiu
authors.initials: Z
authors.lastname: Zhou
authors.forename: Longlong
authors.initials: L
authors.lastname: Ma
authors.forename: Haibin
authors.initials: H
authors.lastname: Li
mesh_terms: D018533:Biomass; D002245:Carbon Dioxide / Q000737:chemistry*; D002384:Catalysis; D032486:Cunninghamia / Q000737:chemistry; D004867:Equipment Design; D005740:Gases / Q000737:chemistry / Q000378:metabolism; D006358:Hot Temperature; D007700:Kinetics; D008670:Metals / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning / Q000379:methods; D014961:X-Ray Diffraction / Q000379:methods
chemical_list: D005740:Gases; D008670:Metals; D002245:Carbon Dioxide