物理化学学报 >> 2001, Vol. 17 >> Issue (06): 547-551.doi: 10.3866/PKU.WHXB20010615

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多产低碳烯烃及柴油用分子筛的设计

刘欣梅;阎子峰;王槐平   

  1. 石油大学重质油加工国家重点实验室,东营 257062
  • 收稿日期:2000-10-08 修回日期:2001-12-18 发布日期:2001-06-15
  • 通讯作者: 阎子峰 E-mail:zfyancat@hdpu.edu.cn

Optimization of Zeolite for Producing Lighter Olefin and Diesel in FCC Process

Liu Xin-Mei;Yan Zi-Feng;Wang Huai-Ping   

  1. State Key Laboratory for Heavy Oil Processing, University of Petroleum,Dongying 257062
  • Received:2000-10-08 Revised:2001-12-18 Published:2001-06-15
  • Contact: Yan Zi-Feng E-mail:zfyancat@hdpu.edu.cn

关键词: USY分子筛, 酒石酸, 晶体结构, 孔分布, 低碳烯烃, 柴油

Abstract: A new method to design FCC catalyst for producing lighter olefin and diesel was developed and the USYbased catalyst was synthesized by means of this method. The USY zeolites ultrastablized in the hydrothermal treatment were further modified with tartaric acid in unbuffed system. The crystal structure, surface area and pore distribution,thermal stability and microactivity for catalytic cracking of modified samples were respectively characterized by XRD, N2adsorption,DTA and MAT techniques. The result shows that the Si/Al ratios,crystallinities and thermal stabilities of modified USY samples are effectively improved;simultaneously, the crystal cell size and particle size are obviously decreased. The pore system (micropore and secondary mesopore) is positively developed and the pore distribution is obviously optimized. The optimization of pore and acid sites results in the preferable production of lighter olefins and diesels in FCC process. This means that FCC reaction on modified USY zeolite leads to deep cracking in micropores and partial cracking in mesopores. Optimization of this mo dified USY zeolite might result in a novel FCC catalyst.

Key words: USY zeolite, Tartaric acid, Crystal structure, Pore distribution, Lighter olefins, Diesel