用钴和钯改性铝硅酸盐的二氧化碳加氢反应

Sh.F.Tagiyeva Sh.F.Tagiyeva
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摘要

研究了含Co和Co- pd的sio_2含量分别为1、10和40 wt.%的sio_2在常压下流动模式下对sio_2的加氢反应。用XRD和EPR对合成的催化剂进行了表征。在只含钴的催化剂上,反应温度≤300℃时,实际上只生成甲烷,反应温度≥300℃时,生成甲烷和不超过1%的CO。结果表明,随着SiO2/Al2O3比的增加,甲烷产率降低。Co,Pd/ sial -10催化剂中钯的加入促进了甲醇的生成,甲醇的产率随着反应温度的升高而增加,Co,Pd/ sial -10催化剂在反应温度为500℃时达到最大值。讨论了CO2加氢制甲醇的反应机理及钯在该反应中的作用。关键词:二氧化碳,加氢,甲烷,甲醇,Siral, Pd, Co
本文章由计算机程序翻译,如有差异,请以英文原文为准。
HYDROGENATION OF CARBON DIOXIDE ON SIRAL ALUMINOSILICATES MODIFIED WITH COBALT AND PALLADIUM
The reaction of hydrogenation of CO2 in flow mode at atmospheric pressure on Siral aluminosilicates with 1, 10, and 40 wt.% SiO2 and containing Co and Co-Pd has been studied. The synthesized catalysts were characterized by XRD and EPR spectroscopy. It has been established that on catalysts containing only cobalt, at a reaction temperature of ≤ 300oC, practically only methane is formed, and at a reaction temperature of T ≥ 300oC, methane and no more than 1% CO are formed. It is shown that with an increase in the SiO2/Al2O3 ratio, a decrease in the methane yield is observed. The introduction of palladium into the composition of the Co/Siral catalyst stimulates the formation of methanol, the yield of which increases with an increase in the reaction temperature and reaches its maximum value at a reaction temperature of 500°C for the Co,Pd/Siral-10 catalyst. The mechanism of the reaction of CO2 hydrogenation to methanol and the role of palladium in this reaction are discussed. Keywords: carbon dioxide, hydrogenation, methane, methanol, Siral, Pd, Co.
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