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题名	生物质气一步法合成LPG催化剂及工艺研究; Experimental Study on the Catalyst and Techniques for the Direct Synthsis of LPG from Biomass Synthesis Gas
作者	吕永兴
学位类别	硕士
答辩日期	2008-06-03
授予单位	中国科学院广州能源研究所
授予地点	广州能源研究所
导师	王铁军
关键词	生物质 合成气 液化石油气 双功能催化剂 HZSM-5型分子筛
其他题名	Experimental Study on the Catalyst and Techniques for the Direct Synthsis of LPG from Biomass Synthesis Gas
中文摘要	With declining reserves of fossil fuels and the threat of global climate deterioration caused largely by the combustion of fossil fuels, the search for a renewable substitute as raw material to replace petroleum has been intensified all over the world. Since biomass feedstock is clean, cheap and renewable, the developments and utilizations of the biomass resoures are prospective in the future. The process of direct synthsis Liquefied Petroleum Gas (LPG) highly efficient and low-cost, has already been suggested as a way of utilizing biomass and has great economical and social effects. In this paper, for the high conversion of biomass syngas to LPG, the catalyst for the direct LPG synthesis is investigated. Research includes the following three aspects: (1) the effect of HZSM-5 zeolite and USY zeolite on direct synthesis LPG; (2) the effect of Si/Al ratio of HZSM-5 zeolite on the direct LPG synthesis; (3) the effect of MgO modified HZSM-5 zeolite on the direct LPG synthesis. The catalyst test of LPG synthesis from biomass syngas were carried out in an integral micro-reactor and the catalysts were characterized by the means of NH3-TPD and XRD. The major results are: 1. The research results show that HZSM-5 zeolite was significantly better than ultra-stable USY zeolite. In the process of LPG synthesis, the best reaction temperature of HZSM-5 is 325℃，but Ultra-stable USY zeolite is 340℃. It also shows that dehydration and the selectivity to C3+C4 of HZSM-5 zeolite is better than that of ultra-stable USY zeolite. 2. The hybrid catalyst consists of methanol synthesis catalyst and HZSM-5 zeolite, which demonstrated a highly effective formation when the mass ratio of methanol synthesis catalyst and HZSM-5 zeolite is 2:1. The results show that the CO conversion is increased with the decrease of Si/Al ratio. The acidity of the HZSM-5 with Si/Al value is Cat25＞Cat38＞Cat50. The space time yield of C3+C4 with Si/Al value is Cat38＞Cat25＞Cat50. According to our study, with Si/Al ratio of 38, the selectivity to C3+C4 and the space time yield of C3+C4 can reach the best value respectively. 3. NH3-TPD characterization results showed that with the increase in MgO content, HZSM-5 zeolite reduced the amount of B-acid, but the low-temperature peaks almost unchanged. The results showed that the effect of LPG synthesis is the best when containing 0.25%~1% MgO of HZSM-5 zeolite is a dehydration catalyst of LPG snthesis catalyst. It also shows that moderate addition of MgO can improve the stability of catalysts and catalyst life.
语种	中文
公开日期	2011-07-14 ; 2011-07-15
页码	67
内容类型	学位论文
源URL	[http://ir.giec.ac.cn/handle/344007/5820]
专题	中国科学院广州能源研究所
推荐引用方式 GB/T 7714	吕永兴. 生物质气一步法合成LPG催化剂及工艺研究, Experimental Study on the Catalyst and Techniques for the Direct Synthsis of LPG from Biomass Synthesis Gas[D]. 广州能源研究所. 中国科学院广州能源研究所. 2008.

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