引用本文:
陈建刚, 相宏伟, 董庆年, 王秀芝, 孙予罕. 钴基费-托合成催化剂上CO、H2的吸附行为[J]. 物理化学学报,
2001, 17(02): 161-164.
doi:
10.3866/PKU.WHXB20010214
Citation: Chen Jian-Gang, Xiang Hong-Wei, Dong Qing-Nian, Wang Xiu-Zhi, Sun Yu-Han. H2 or CO Chemsorption on Co-based Catalysts for F-T Synthesis[J]. Acta Physico-Chimica Sinica, 2001, 17(02): 161-164. doi: 10.3866/PKU.WHXB20010214
Citation: Chen Jian-Gang, Xiang Hong-Wei, Dong Qing-Nian, Wang Xiu-Zhi, Sun Yu-Han. H2 or CO Chemsorption on Co-based Catalysts for F-T Synthesis[J]. Acta Physico-Chimica Sinica, 2001, 17(02): 161-164. doi: 10.3866/PKU.WHXB20010214
钴基费-托合成催化剂上CO、H2的吸附行为
摘要:
采用程序升温脱附及FTIR技术考察了CO、H2在钴基催化剂上的吸附行为.H2TPD表明,Co/SiO2催化剂有两类脱附氢,引入锆助剂后,低温脱附氢量明显增加,高温吸附氢量下降.COTPD及吸附态CO的红外光谱表明锆助剂使CO在钴催化剂上的吸附强度减弱,但其吸附量增大.钴基催化剂的费托合成反应性能可以用吸附态物种的变化来解释.
English
H2 or CO Chemsorption on Co-based Catalysts for F-T Synthesis
Abstract:
Both Co/SiO2 and Co/ZrO2/SiO2 catalysts for FT synthesis were characterized by temperature programmed desorption (TPD) and FTIR spectra.H2TPD evidenced that there were two H2 desorption peaks over Co/SiO2 catalyst and that the amount of H2 adsorption decreased upon introduction of ZrO2.COTPD and COIR showed that addition of ZrO2 weakened the intensity of CO adsorption but increased the amount of adsorbed CO.In FT synthesis,ZrO2 promoter enhanced the formation of heavy hydrocarbons in addition to keeping high activity.Such a shift of product array to heavier hydrocarbon was related to the increase of surface H2/CO ratio.
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