Abstract

The latest research results on the specific features of the process of cumene dehydrogenation to α-methylstyrene (AMS) on the porous ceramic catalytic converters were presented. The influence of the method of formation of the mono- and bimetallic rhenium- and tungsten-based components on the activity and selectivity of the synthesized converters was evaluated. It was found that the monometallic tungsten-containing converter obtained by combining self-propagating high-temperature synthesis (SHS) with the sol-gel process has the optimal composition. The experiments showed that, for this converter, the temperature range of effective operation is 550–600°C. In this range the space-time yield of AMS reached 14% at a maximum productivity of 20.57 g h^–1 dm^–3. The degree of carburization of the sample after 6 h of the experiment did not exceed 5 wt %, indicating its high resistance against coking.

中文翻译：

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含铼钨多孔陶瓷转化器的组成及制备方法对异丙苯脱氢制α-甲基苯乙烯工艺特性的影响

摘要

介绍了在多孔陶瓷催化转化器上异丙苯脱氢制α-甲基苯乙烯（AMS）过程的具体特点的最新研究成果。评估了单金属和双金属铼和钨基组分的形成方法对合成转换器的活性和选择性的影响。研究发现，将自蔓延高温合成（SHS）与溶胶-凝胶工艺相结合得到的单金属含钨转化体具有最佳组成。实验表明，对于该转换器，有效工作温度范围为 550–600°C。在此范围内，AMS 的时空产率达到 14%，最大生产率为 20.57 gh ^–1 dm ^–3. 实验 6 h 后样品的渗碳程度不超过 5 wt%，表明其抗结焦能力强。