催化学报 ›› 2014, Vol. 35 ›› Issue (5): 748-756.DOI: 10.1016/S1872-2067(12)60710-4

• 研究论文 • 上一篇    下一篇

Ni/SAPO-11催化剂上棕榈油加氢脱氧制异构烃燃料

刘琪英, 左华亮, 张琦, 王铁军, 马隆龙   

  1. 中国科学院广州能源研究所, 中科院可再生能源重点实验室, 广东广州510640
  • 收稿日期:2013-08-22 修回日期:2013-09-12 出版日期:2014-04-18 发布日期:2014-04-24
  • 通讯作者: 王铁军,马隆龙
  • 基金资助:

    国家重点基础研究发展计划(973计划,2012CB215304);广东省自然科学基金(S2012040006992);国家自然科学基金(51376185和51161140331).

Hydrodeoxygenation of palm oil to hydrocarbon fuels over Ni/SAPO-11 catalysts

Qiying Liu, Hualiang Zuo, Qi Zhang, Tiejun Wang, Longlong Ma   

  1. CAS Key Laboratory of Renewable Energy, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, Guangdong, China
  • Received:2013-08-22 Revised:2013-09-12 Online:2014-04-18 Published:2014-04-24
  • Supported by:

    This work was supported by the National Basic Research Program of China (973 Program, 2012CB215304), the Natural Scientific Foundation of Guangdong Province (S2012040006992), and the National Natural Science Foundation of China (51376185 and 51161140331).

摘要:

采用水热法合成了小粒径、具有介孔结构的SAPO-11分子筛. 采用浸渍法制备了不同Ni负载量的Ni/SAPO-11催化剂. 并采用X射线衍射,扫描电镜,N2物理吸附-脱附,NH3程序升温脱附,热重和H2化学吸附技术对该类催化剂的物理化学性质进行了详细表征. 结果表明,SAPO-11较大表面积和介孔结构可分散Ni,使得Ni粒子尺寸较小. 在棕榈油加氢脱氧制备液体烃类燃料反应中,液体烷烃产物由相关脂肪酸中间产物的直接加氢脱氧和脱羰-加氢脱氧两种途径产生. Ni/SAPO-11催化剂的弱/中强酸性质及其匹配的金属-酸双功能可显著抑制积炭反应,提高催化剂的寿命,液体烷烃收率高达70%,异构烷烃选择性超过80%.

关键词: 棕榈油, 加氢脱氧, 烃, 异构化, 协同效应

Abstract:

Small particles of SAPO-11 with large surface area and mesoporosity were synthesized hydrothermally. Ni/SAPO-11 catalysts with different Ni loadings were prepared by incipient wetness impregnation, and their physicochemical properties were characterized by X-ray diffraction, scanning electron microscopy, N2 adsorption-desorption, NH3 temperature-programmed desorption, Thermogravimetric, and H2 chemisorption. In the Ni impregnation of SAPO-11, the mesopores of SAPO-11 accommodated the Ni particles and give good dispersions, but with the partial blocking of some micropores. In the hydrodeoxygenation of palm oil, the production of liquid alkanes depends on the competition between hydrodeoxygenation and decarbonylation pathways via the corresponding carboxylic acid intermediates. The weak and medium acidity of SAPO-11 and a good match of the Ni and SAPO-11 functions in the Ni/SAPO-11 catalysts decreased the cracking of primary long chain alkanes and gave a high liquid alkane yield of 70 wt% and isomerization selectivity of >80 mol%.

Key words: Palm oil, Hydrodeoxygenation, Hydrocarbon, Isomerization, Synergistic effect