流化床中甲烷芳构化过程

Methane aromatization in fluidized bed reactor

在石英流化床反应器中研究了无氧条件下甲烷直接催化转化制备芳烃的过程.发现催化剂的诱导期长短、甲烷的总转化率与温度、甲烷分压及甲烷空速相关.在973K下,液体产品中苯的选择性与萘的选择性随着催化剂的失活呈现不同的变化趋势.所得主要技术指标(甲烷转化率、苯的收率与选择性等)与固定床微型反应器中的结果相近.还研究了催化剂上的积炭对甲烷转化率、催化剂失活的影响,为将来的进一步研究提供了基础.

The conversion of methane to aromatics was investigated in a quartz fluidized bed reactor. It was observed that the induction period of catalyst and the conversion of methane were related to the reaction temperature, the partial pressure of methane and the space velocity of methane. The selectivity to benzene and naphthalene in liquid products showed different tendency with the deactivation of catalyst. All the main results （conversion of methane, yield and selectivity of benzene） were similar to the results in the microscale fixed bed. Also the effect of the coke deposited on the catalyst on methane conversion and catalyst deactivation was discussed, providing the basis for the further investigation.