化工学报 ›› 2018, Vol. 69 ›› Issue (6): 2496-2502.DOI: 10.11949/j.issn.0438-1157.20171344

• 催化、动力学与反应器 • 上一篇    下一篇

脂肪酸甲酯加氢脱氧和蒸汽裂解两步法制备生物烯烃

孙培永, 王海星, 周玉鹏, 张胜红, 姚志龙   

  1. 北京石油化工学院化学工程学院, 恩泽生物质精细化工北京市重点实验室, 北京 102617
  • 收稿日期:2017-10-09 修回日期:2018-01-05 出版日期:2018-06-05 发布日期:2018-06-05
  • 通讯作者: 张胜红
  • 基金资助:

    国家自然科学基金项目(21703012);北京市教育委员会科技计划项目(KM201610017003)。

Production of bio-olefins from fatty acid methyl esters via hydrodeoxygenation and sequential steam cracking

SUN Peiyong, WANG Haixing, ZHOU Yupeng, ZHANG Shenghong, YAO Zhilong   

  1. Beijing Key Laboratory of Enze Biomass Fine Chemicals, College of Chemical Engineering, Beijing Institute of Petrochemical Technology, Beijing 102617, China
  • Received:2017-10-09 Revised:2018-01-05 Online:2018-06-05 Published:2018-06-05
  • Supported by:

    supported by the National Natural Science Foundation of China (21703012) and the Scientific Research Project of Beijing Municipal Education Commission (KM 201610017003).

摘要:

脂肪酸甲酯经生物烷烃制备轻质烯烃,有望缓解低原油价格导致的生物柴油产业发展困境。采用浸渍法制备了NiMo/Al2O3催化剂,首先考察其催化脂肪酸甲酯加氢脱氧制备生物烷烃的性能,然后进一步分析生物烷烃蒸汽裂解制烯烃的转化规律。结果表明,预硫化的NiMo/Al2O3能够高选择性地催化饱和脂肪酸甲酯加氢制备生物烷烃,并且催化剂的结构在反应1000 h后无明显改变。以上述烷烃为原料,在裂解炉出口温度为810℃,出口压力为0.10 MPa,物料停留时间为0.23 s和水油质量比为0.75的反应条件下进行蒸汽裂解,产物中乙烯、丙烯和丁二烯的收率分别达到36.30%、18.14%和7.46%,显著高于同等条件下石脑油原料得到的27.45%、14.74%和5.31%,表明源于脂肪酸甲酯的生物烷烃可以作为生产轻质烯烃的原料补充。

关键词: 脂肪酸甲酯, 加氢脱氧, 生物烷烃, 蒸汽裂解, 生物烯烃

Abstract:

Conversion of fatty acid methyl esters (FAMEs) to bio-paraffins and further to bio-olefins offers a potential solution to the emerging problems in the biodiesel industry due to the collapse of world oil prices. NiMo/Al2O3 catalyst prepared via an impregnation method was evaluated in the catalytic hydrodeoxygenation of FAMEs to bio-paraffins. The obtained paraffins were used as feedstocks to produce bio-olefins via steam cracking. The presulfided NiMo/Al2O3 converted the saturated FAMEs selectively to paraffins, without observable changes in the catalyst structure after reaction for 1000 h. Under the cracking conditions of coil-out temperature and pressure at 810℃ and 0.10 MPa, residence time at 0.23 s, and mass ratio of water to paraffins at 0.75, the yields of ethylene, propylene and butadiene were 36.30%, 18.14% and 7.46%, respectively. These data were much higher than the values of 27.45%, 14.74% and 5.31% obtained with naphtha as feedstocks under the similar conditions, indicating that bio-paraffins derived from FAMEs are alternative feedstocks for light olefins.

Key words: fatty acid methyl ester, hydrodeoxygenation, bio-paraffin, steam cracking, bio-olefin

中图分类号: