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锌修饰的负载型金催化剂催化醇气相氧化
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作者 周宇恒 《当代化工研究》 CAS 2024年第9期61-63,共3页
以十二烷基硫醇保护的纳米金作为金源,并借助锌修饰的碳纳米管,成功制备了Au/ZnO/C催化剂。通过在固定床反应器中研究该催化剂在苯甲醇气相选择性氧化反应中的影响,建立了相应的动力学模型。实验结果显示,Au/ZnO/C复合结构有助于促进氧... 以十二烷基硫醇保护的纳米金作为金源,并借助锌修饰的碳纳米管,成功制备了Au/ZnO/C催化剂。通过在固定床反应器中研究该催化剂在苯甲醇气相选择性氧化反应中的影响,建立了相应的动力学模型。实验结果显示,Au/ZnO/C复合结构有助于促进氧气的活化。在金锌比例为1:1的条件下,于773 K焙烧得到的催化剂在H_(2)/Ar气氛中展现出高达40000 h^(-1)的活性。动力学研究进一步表明,锌修饰的负载金催化剂提高了氧气的活化程度,提升了催化性能,并在醇氧化反应中降低了活化能。 展开更多
关键词 氧化 金纳米颗粒 复合结构 气相醇氧化
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A review of the direct oxidation of methane to methanol 被引量:7
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作者 韩宝斋 杨扬 +4 位作者 许妍妍 U.J.Etim 乔柯 许本静 阎子峰 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2016年第8期1206-1215,共10页
This article briefly reviewed the advances in the process of the direct oxidation of methane to methanol (DMTM) with both heterogeneous and homogeneous oxidation. Attention was paid to the conversion of methane by t... This article briefly reviewed the advances in the process of the direct oxidation of methane to methanol (DMTM) with both heterogeneous and homogeneous oxidation. Attention was paid to the conversion of methane by the heterogeneous oxidation process with various transition metal ox‐ides. The most widely studied catalysts are based on molybdenum and iron. For the homogeneous gas phase oxidation, several process control parameters were discussed. Reactor design has the most crucial role in determining its commercialization. Compared to the above two systems, aque‐ous homogenous oxidation is an efficient route to get a higher yield of methanol. However, the cor‐rosive medium in this method and its serious environmental pollution hinder its widespread use. The key challenge to the industrial application is to find a green medium and highly efficient cata‐lysts. 展开更多
关键词 METHANE Direct oxidation METHANOL Heterogeneous oxidation Gas-phase homogeneous oxidation Aqueous catalyzed oxidation
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