摘要
以吗啉 (C4H9NO)为主要模板剂 ,以少量四乙基氢氧化铵 (TEAOH)为辅助模板剂合成了SAPO 34分子筛 ,并用氨吸附红外、核磁共振和氮吸附等手段对合成的SAPO 34分子筛进行了表征 .结果表明 ,与单独以吗啉为模板剂合成的样品相比 ,用复合模板剂合成的分子筛样品的比表面积和孔体积均有所增大 ;由于在分子筛骨架中形成了“硅岛” ,使其B酸量有所增加 ,对甲醇制低碳烯烃反应的催化性能有所改善 .
A composite template tetraethylammonium hydroxide (TEAOH)-morpholine (C 4H 9NO) was used to synthesize SAPO-34 molecular sieve. The SAPO-34 molecular sieve samples were characterized by NH 3-IR, NMR and N 2 adsorption. The characterization results showed that the SAPO-34 molecular sieve sample had larger specific surface area and larger pore volume than those of the molecular sieve sample synthesized with single morpholine as template. Owing to the 'silicon island' structure formed, more Brnsted acid sites came into being in the SAPO-34 sample synthesized with TEAOH-C 4H 9NO, which had better catalytic performance for methanol-to-olefin reaction than the SAPO-34 sample synthesized with morpholine alone.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2004年第9期707-710,共4页
基金
国家重点基础研究发展规划 ( 973计划 )项目 ( 2 0 0 3CB615 80 1)
上海市科委重大基础研究项目 ( 0 3DJ14 0 0 4)
中国石油化工股份有限公司重点科技攻关项目
