甲醇脱水制二甲醚的杂多酸/纳米HZSM-5复合固体酸催化剂

• 作 者: 姜春杰 孙胜男 王旭阳 王祥生 郭洪臣 郭新闻 陈立东
• 机 构: 辽宁师范大学功能材料化学研究所,大连理工大学精细化工国家重点实验室,
• 出 处: 化学学报
• 发表日期: 2013年05期
• 关键词: 12-磷钨酸 纳米HZSM-5沸石 甲醇脱水 二甲醚

开发低温、高活性和良好稳定性的催化剂成为甲醇气相脱水制二甲醚乃至合成气一步法制二甲醚反应的核心.在氧化铝挤条成型的纳米HZSM-5沸石上负载Keggin结构12-磷钨酸制备了复合固体酸催化剂,通过FT-IR、UV-Raman、31P MAS-NMR和XRD对所制备的样品进行表征.以甲醇气相脱水制二甲醚为探针反应的研究结果表明,在选定的操作条件下连续运转超过300 h,甲醇摩尔转化率大于87%(理论转化率90.9%),二甲醚摩尔选择性高于99.0%,是目前该反应非常有效的催化剂之一.

Development of low temperature, high activity and good stability of the catalyst as methanol vapor phase dehydration dimethyl ether or syngas synthesis of dimethyl ether one-step reaction of the core. In alumina extrusion molding nano HZSM-5 zeolite load Keggin structure 12-phosphorus The prepared solid samples were characterized by FT-IR, UV-Raman, 31P MAS-NMR and XRD.The results of gas-phase dehydration of methanol with dimethyl ether showed that in the presence of It is one of the most effective catalysts for this reaction since it operates continuously for more than 300 h under the selected operating conditions. The molar conversion of methanol is more than 87% (theoretical conversion 90.9%) and the molar selectivity of dimethyl ether is higher than 99.0%.