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首页> 外文期刊>Journal of industrial and engineering chemistry >Gas phase dehydration of glycerol catalyzed by rutile TiO2-supported heteropolyacids
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Gas phase dehydration of glycerol catalyzed by rutile TiO2-supported heteropolyacids

机译：金红石型TiO2负载杂多酸催化甘油的气相脱水

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摘要

Gas phase dehydration of glycerol catalyzed by the rutile TiO2-supported heteropolyacids was investigated. The TiO2-supported heteropolyacid catalysts were prepared by the incipient wetness impregnation method using silicotungstic, phosphotungstic, and phosphomolybdic acids as active compounds. The as-prepared catalysts were characterized by X-ray diffraction, infrared spectroscopy, temperature programmed desorption of ammonia, and surface area measurement. The heteropolyacids supported by rutile TiO2 were crystallites. The catalytic activity of the catalysts in the gas phase dehydration of glycerol was significantly affected by the type and loading of heteropolyacids. TiO2-supported silicotungstic acid (20 wt.%) catalyst showed the highest catalytic activity with an acrolein selectivity of 80 mol% at a conversion of glycerol of 99% and a reaction temperature of 280 °C under ambient pressure. The possible reaction route in the gas phase dehydration of glycerol catalyzed by the TiO2-supported heteropolyacid catalysts was also discussed briefly.
机译：研究了金红石型TiO2负载杂多酸催化甘油的气相脱水。 TiO 2负载的杂多酸催化剂是通过使用硅钨酸，磷钨酸和磷钼酸作为活性化合物的湿法浸渍法制备的。所制备的催化剂通过X射线衍射，红外光谱，程序升温的氨解吸和表面积测量来表征。金红石型TiO2负载的杂多酸为微晶。甘油气相脱水中催化剂的催化活性受杂多酸的类型和负载量显着影响。 TiO 2负载的硅钨酸（20wt。％）催化剂在甘油的转化率为99％和在环境压力下的反应温度为280℃的情况下显示出最高的催化活性，丙烯醛选择性为80mol％。还简要讨论了TiO2负载杂多酸催化剂催化甘油气相脱水的可能反应路线。

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