CD_4合成工艺研究

STUDY ON THE SYNTHESIS PROCESS OF CD_4

摘要: 采用自制催化剂Ni Mo/Al2O3催化CO2甲烷化反应,制备了大气示踪剂CD4。考察了反应温度、D2与CO2体积比、催化剂负荷等工艺参数对CD4产率和副产物CO体积分数的影响。结果表明:反应温度为350℃、D2与CO2体积比为6、催化剂负荷为6 4μmol/(gcat.·min)时,CD4产率大于96%,反应混合物中CO体积分数低于2 0×10-3。

Abstract: The atmospheric tracer gas CD4 is synthesized by methanation of CO2, using NiMo/γAl2O3 as catalyst. The effects of reaction conditions, such as temperature, volume ratio of D2 to CO2, and loading of catalyst, on the yield of CD4 and the volume fraction of CO byproduct are investigated experimentally. The results show that when the temperature is 350 ℃, the volume ratio of D2 to CO2 is 6, and the loading of catalyst is controlled less than 6.4 μmol/(gcat·min), the yield of CD4 is more than 96%, and the volume fraction of CO in the reaction mixture is less than 2.0×10-3.