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H2气氛下用反应球磨法制备了镁碳复合储氢材料65Mg35C,在连续操作的固定床反应装置上进行了对CS2的加氢反应,研究了温度对加氢反应的影响。结果表明,材料具有较好的放氢性能,起始放氢温度为267.8℃,储氢密度高达4.95wt.%;加氢反应中生成了H2S和MgS,且反应温度越高,MgS的生成量越多,而氢转化率只有当材料的放氢速率与CS2的加氢速率相匹配时才能达到最大值;材料的放氢反应与CS2的加氢反应存在耦合效应,在一定温度范围内,这种耦合效应既可降低材料的放氢温度,又可提高材料在该温度下的放氢量。
Hydrogenation reaction of CS2 was carried out on a continuously operated fixed bed reactor under H2 atmosphere. The effects of temperature on the hydrogenation reaction were studied. The results show that the material has good hydrogen desorption performance, the initial hydrogen desorption temperature is 267.8 ℃ and the hydrogen storage density is as high as 4.95wt.%. H2S and MgS are formed in the hydrogenation reaction. The higher the reaction temperature, The more the hydrogen conversion rate reaches the maximum value when the hydrogen evolution rate of the material matches the hydrogenation rate of CS2, there is a coupling effect between the hydrogen evolution reaction of the material and the hydrogenation reaction of CS2. In a certain temperature range, The coupling effect can not only reduce the hydrogen release temperature of the material, but also increase the amount of hydrogen released by the material at the temperature.