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Adsorption of thiophene and toluene on NaY zeolites exchanged with Ag(I), Ni(II) and Zn(II)

机译:噻吩和甲苯在与Ag(I),Ni(II)和Zn(II)交换的NaY沸石上的吸附

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摘要

The present study evaluates the adsorption capacity of thiophene and toluene and their competitive behaviour on zeolite NaY exchanged with transition metals (5 wt% Ni, Zn and Ag). The headspace chro-matography technique was used to obtain monocomponent apparent adsorption isotherms of thiophene and toluene with NaY, NiY, ZnY and AgY using isooctane as an inert solvent at 30 and 60℃. Selectivity between toluene and thiophene at saturation capacities were also measured at 30℃. The adsorption capacity for thiophene increased for the studied adsorbents as follows: NaY < ZnY < NiY < AgY at 30℃ and NaY < NiY < ZnY < AgY at 60℃. Toluene is less adsorbed, but within the same order of magnitude as thiophene and following the same sorbent order. All adsorbents were moderately selectivity for toluene. Nevertheless, the sulfur content was successfully reduced in the presence of aromatics and olefins in immersion tests with a model fuel mixture. These results show the importance of inserting transitions metals in the zeolitic structure to enhance the adsorption of both aromatic and sulfur containing compounds in organic liquid mixtures, which shows promise to meet environmental standards in transportation fuels.
机译:本研究评估了噻吩和甲苯的吸附能力以及它们在与过渡金属(5%的Ni,Zn和Ag)交换的NaY沸石上的竞争行为。采用顶空色谱技术,在30和60℃下,以异辛烷为惰性溶剂,分别得到噻吩和甲苯与NaY,NiY,ZnY和AgY的单组分表观吸附等温线。在30℃时也测定了甲苯和噻吩在饱和容量下的选择性。所研究的吸附剂对噻吩的吸附能力增加如下:NaY

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  • 来源
    《Fuel》 |2009年第10期|1885-1892|共8页
  • 作者单位

    GPSA - Crupo de Pesquisa em Separacoes por Adsorcao, Department of Chemical Engineering, Universidade Federal do Ceara, Campus do Pici, Bl.709, 60455-760, Fortaleza, Brazil;

    GPSA - Crupo de Pesquisa em Separacoes por Adsorcao, Department of Chemical Engineering, Universidade Federal do Ceara, Campus do Pici, Bl.709, 60455-760, Fortaleza, Brazil;

    Laboratorio de Processos Cataliticos, Department of Chemical Engineering, Universidade Federal de Pemambuco., Cidade Universitaria, 50740-521 Recife, Brazil;

    GPSA - Crupo de Pesquisa em Separacoes por Adsorcao, Department of Chemical Engineering, Universidade Federal do Ceara, Campus do Pici, Bl.709, 60455-760, Fortaleza, Brazil;

    GPSA - Crupo de Pesquisa em Separacoes por Adsorcao, Department of Chemical Engineering, Universidade Federal do Ceara, Campus do Pici, Bl.709, 60455-760, Fortaleza, Brazil;

    Department of Inorganic Chemistry, Crystallography and Mineralogy (Associated Unit of ICP-CSIC), Facultad de Ciencias, Universidad de Malaga, Campus Teatinos, 29071 Malaga, Spain;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    adsorption; Y zeolite; thiophene; nickel; silver;

    机译:吸附Y型沸石;噻吩镍;银;

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