Zeoletic support of HDS catalysts for deep hydrodesulfurization to achieve 10PPM sulfur level

Naoyuki Kunisada, Ki Hyouk Choi, Yozo Korai, Isao Mochida, K. Nakano

研究成果: ジャーナルへの寄稿Conference article

3 引用 (Scopus)

抜粋

A two layer catalyst bed was prepared to achieve desulfurization without H2S (NH3) removal between layers. The functions of the catalysts in each layer were defined as follows. first layer: complete removal of reactive sulfur species and 95% removal of refractory sulfur species. second layers: remaining refractory sulfur species (∼ 400-500 ppm) must be removed to < 10 ppm in the presence of H2S and NH3. Several types of zeolite containing supports for HDS catalysts were prepared to be studied in the first and second layers. Acidity is important to enhance HDS of the refractory sulfur species in the hydrogenation route by moderate H2S inhibition. Zeolite containing CoMo and NiMo showed higher activity in straight run gas oil (SRGO), hydrodesulfurized SRGO + H2S + NH3. On the other hand, zeolite having strong acidity was easily deactivated and could crack and isomerizes hydrocarbons. Alumina-zeolite composite catalyst showed very high activity in HDS of HSRGO, while it did not crack the substrate so much. Thus, modified zeolite alumina catalyst might have longer life time than any other zeolite containing catalyst, with high cracking activity. Appropriate sets of two catalysts with successive layers were very active to achieve regulated sulfur level of gas oil.

元の言語英語
ページ(範囲)502-503
ページ数2
ジャーナルACS Division of Fuel Chemistry, Preprints
48
発行部数2
出版物ステータス出版済み - 9 1 2003

    フィンガープリント

All Science Journal Classification (ASJC) codes

  • Energy(all)

これを引用

Kunisada, N., Choi, K. H., Korai, Y., Mochida, I., & Nakano, K. (2003). Zeoletic support of HDS catalysts for deep hydrodesulfurization to achieve 10PPM sulfur level. ACS Division of Fuel Chemistry, Preprints, 48(2), 502-503.