| 负载型氧化锆催化剂上甲醇脱氢制甲醛 |
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| 引用本文： | 张藩贤,游晨涛,许翩翩,马坚,李庆水.负载型氧化锆催化剂上甲醇脱氢制甲醛[J].催化学报,1993,14(2):139-142. |
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| 作者姓名： | 张藩贤 游晨涛 许翩翩 马坚 李庆水 |
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| 作者单位： | 厦门大学化学系物理化学研究所，厦门大学化学系物理化学研究所，厦门大学化学系物理化学研究所，厦门大学化学系物理化学研究所，厦门大学化学系物理化学研究所 厦门 316005，厦门 316005，厦门 316005，厦门 316005，厦门 316005 |
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| 摘 要： | 甲醇在无氧条件下脱氢,可以制得含水量极低的甲醛。在上述反应中,主要采用以硅胶为载体的负载型氧化物催化剂,其中以周期表ⅠB和ⅡB族金属,如铜、银或锌为主要组分。这些金属的氧化物在高温下易还原、烧结和表面积炭而使催化剂失活。添加P,S,Se或Te等组分作为助催化剂,在一定程度上可以改善催化性能。最近的发展倾向是采用非负载的碱金属盐作为催化剂,如Na_2CO_3,Na_2MoO_4,或Na_xLi_(1-x)AlO_2(0≤x≤1)。这类催化剂要求过高的反应温度,如高于650℃,甚至900℃条件下使用。
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| 关 键 词： | 负载型催化剂 ZrO_2/SiO_2 甲醇 脱氢 甲醛 |
DEHYDROGENATION OF METHANOL TO FORMALDEHYDE OVER SUPPORTED ZIRCON1A CATALYSTS |
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| Zhang,Fan-xian,You,Chen-tao,Xu,Pian-pian, Ma,Jian and Li,Qing-shui.DEHYDROGENATION OF METHANOL TO FORMALDEHYDE OVER SUPPORTED ZIRCON1A CATALYSTS[J].Chinese Journal of Catalysis,1993,14(2):139-142. |
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| Authors: | Zhang Fan-xian You Chen-tao Xu Pian-pian Ma Jian and Li Qing-shui |
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| Abstract: | Novel catalysts of higher selectivity for the dehydrogenalion of me-thanol to formaldehyde were obtained by supporting hardly reducible metal oxide such as zirconia or alumina on silica. The ZrO2/SiO2 and Al2O3/SiO2 catalysts were prepared by impregnation of SiO2 with aqueous solution of zirconium nitrate and aluminium nitrate respectively. The selectivity for the formation of formaldehyde of 2% ZrO2/SiO2 and 0.9% Al2O3/SiO2 was the highest. The catalyst containing 2.0% Zr was characterized by X-ray diffraction, NH3-TPD and XPS. The nature of the active sites for methanol conversion on supported oxide catalyst and the reaction mechanism were also discussed. |
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| Keywords: | Supported catalyst ZrO2/SiO2 meth anol dchydiogenation formaldehyde |
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