TiO_2催化剂上CO水合制低碳醇 |
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引用本文: | 季德春,王清遐,徐龙伢,刘盛林. TiO_2催化剂上CO水合制低碳醇[J]. 天然气化工, 2003, 28(3): 16-20 |
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作者姓名: | 季德春 王清遐 徐龙伢 刘盛林 |
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作者单位: | 中国科学院大连化学物理研究所,大连,116023 |
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摘 要: | 在固定床微反反应器上,研究了TiO2对CO水合制低碳醇反应的催化性能。考察了反应条件如温度、压力、CO流速等对催化剂反应性能的影响,在T=573K,p=0 5MPa,CO进气流速30ml/min的条件下,CO转化率达到7 6%,甲醇、乙醇的总收率达到32mg/g/h。另外考察了反应的溶剂效应,溶剂的作用与其碱性有密切关系,强碱性的有机多胺能够有效促进该反应,相对于非极性溶剂的醇收率2 2mg/g/h,在碱性溶剂中相同催化剂的活性最高可达到32 24mg/g/h。还考察了不同晶型TiO2催化剂与反应性能的关系,实验结果表明,TiO2催化剂的热处理温度对反应的CO转化率影响不明显,甲、乙醇的收率却随热处理温度的上升而明显增加,在1023K时,即锐钛矿与金红石质量比为9/2的混晶催化剂,醇产物达到最高,为1 82mg/m2/h,随后下降
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关 键 词: | CO 水合 TiO2催化剂 甲醇 乙醇 |
文章编号: | 1001-9219(2003)03-16-05 |
修稿时间: | 2002-02-10 |
Studies on the Catalytic Alcohols Synthesis from CO and H2O over TiO2 |
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Abstract: | Catalytic alcohols synthesis from CO and H2O over was investigated over TiO2 catalysts The effects of some reaction parameters such as temperature, CO flow rate and pressure on the activity and STY of alcohols from CO hydration over TiO2 were investigated Only the pressure and temperature attained to a certain value could the reaction take place efficiently CO conversion of 76% and the STY of MeOH (about 24 mgg-1h-1) and EtOH (about 8 mgg-1h-1) are obtained under reaction conditions of T = 573K, p = 05 MPa, CO flow rate of 30 mlmin-1 and CO/H2O= 3/2 The catalytic activity was found to increase with the alkalescence of solvent Moreover, the influence of calcining temperature on the reaction performance of the TiO2 was also investigated It was found that the STY of MeOH and EtOH increased with the calcination temperature while the corresponding conversion of CO did not be effected remarkably |
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Keywords: | carbon monoxide hydration TiO_2 catalyst methanol ethanol |
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