石油学报(石油加工) ›› 2019, Vol. 35 ›› Issue (6): 1183-1189.doi: 10.3969/j.issn.1001-8719.2019.06.018

• 研究报道 • 上一篇    下一篇

以尿素为碱源直接合成HZSM-5分子筛

范素兵1,张胜硕1,张建利1,马清祥1,王林2,焦洪桥2,赵天生1   

  1. 1宁夏大学 省部共建煤炭高效利用与绿色化工国家重点实验室 化学化工学院,宁夏 银川 750021; 2神华宁夏煤业集团有限责任公司,宁夏 银川 750001
  • 收稿日期:2018-10-26 修回日期:2019-04-12 出版日期:2019-11-25 发布日期:2020-01-16
  • 通讯作者: 赵天生,男,教授,博士,从事煤基应用催化研究,E-mail:zhaots@nxu.edu.cn E-mail:zhaots@nxu.edu.cn
  • 作者简介:范素兵,男,副研究员,博士,从事分子筛合成及催化应用研究,E-mail:fansb@nxu.edu.cn
  • 基金资助:
    宁夏重点研发计划项目(2015BY014;2017BY063)、国际合作项目(2015DFA40660)、国家自然科学基金(21563024)和宁夏高校科研项目(NGY2017001)资助

Direct Synthesis of HZSM-5 Under Urea Media

FAN Subing1, ZHANG Shengshuo1, ZHANG Jianli1, MA Qingxiang1, WANG Lin2, JIAO Hongqiao2, ZHAO Tiansheng1   

  1. 1College of Chemistry and Chemical Engineering, State Key Laboratory of HighEfficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China; 2Shenhua Ningxia Coal Industry Group, Yinchuan 750001, China
  • Received:2018-10-26 Revised:2019-04-12 Online:2019-11-25 Published:2020-01-16

摘要: 以尿素介质为碱源直接合成HZSM-5分子筛,考察了尿素用量、晶化时间、晶化温度及晶化方式对分子筛合成的影响,并进行了合成工艺放大验证。结果表明:尿素用量对HZSM-5分子筛产品的结晶度和收率均影响明显;晶化时间和晶化温度对产品的结晶度影响明显,但是对产品收率影响较小;动态晶化略优于静态晶化。优化工艺条件下,HZSM-5分子筛在200 mL和2 L晶化釜的单釜质量收率均大于31%,相对结晶度均较高,产品的微观形貌、孔结构、酸性及对甲醇制丙烯反应催化活性基本一致。放大合成产品的结构和性能重现性好、工艺稳定。

关键词: 尿素, HZSM-5, 直接合成, 工艺优化

Abstract: For directly synthesizing HZSM-5 molecular sieve in urea media, the effects of urea amount, crystallization time, temperature and feeding manner were investigated. The synthesis was scaled up. Results show that urea amount obviously affects both the crystallinity and the yield of the target product. Crystallization time and temperature affect mainly the crystallinity. Dynamic crystallization process is slightly better than static one. Under optimal conditions, the single-batch product yield in both 200 mL and 2 L reactors exceed 31% with high crystallinity. The products reveal similar microcosmic appearance, pore structure, acidity and catalytic activity in methanol-to-propylene reaction. The scale-up synthesis was stable with repeatable product property.

Key words: urea, HZSM-5, direct synthesis, process optimization

中图分类号: