磷掺杂碳催化剂的制备及其催化环己烷无氧脱氢性能

Preparation of phosphorus doped carbon and its catalytic performance fornon-oxidative dehydrogenation of cyclohexane

采用淀粉作为碳源、磷酸作为磷源,方便经济地制备了高比表面积的微孔磷掺杂淀粉碳催化剂P@C。实验结果表明,磷酸不仅可以实现淀粉碳中磷的有效掺杂,还可以对碳材料比表面积和孔道结构进行有效调控。更为重要的是制备的P@C催化剂样品表面具有丰富的弱酸中心,并对环己烷无氧脱氢制苯产氢反应表现出了良好的催化性能。使用磷含量1.53%的P@C催化剂,当反应温度为525℃时,环己烷转化率达85%以上,苯选择性接近100%。本研究可为有机液体储氢技术的应用设计提供有益参考。

In this paper,the phosphorus doped microporous starch carbon P@C catalyst with high specific surface area was prepared conveniently and economically by using starch as carbon source and phosphoric acid as phosphorus source.The experimental results showed that phosphoric acid not only achieved the doping of phosphorus,but also effectively regulated thespecific surface area and pore structure of carbon materials.More importantly,there were abundant weak acid centers on the surface of the prepared P@C catalyst samples.The catalyst had great catalytic performance for the non-oxygen dehydrogenation of cyclohexane to benzene and hydrogen.P@C with phosphorus content of 1.53%gave over 85%cyclohexane conversion and near 100%benzene selectivity at 525℃.The research of this paper would provide a useful reference for the applied design of organic liquid hydrogen storage.