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首页> 外文期刊>Journal of Hazardous Materials >Effective removal of hydrogen sulfide using 4A molecular sieve zeolite synthesized from attapulgite
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Effective removal of hydrogen sulfide using 4A molecular sieve zeolite synthesized from attapulgite

机译：凹凸棒土合成的4A分子筛分子筛有效去除硫化氢

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摘要

In this work, 4A molecular sieve zeolite was synthesized from attapulgite (ATP) in different conditions and was applied initially for H2S removal. The sorbent was characterized by scanning electron microscopy, X-ray diffraction, Fourier transform infrared spectra and N-2 adsorption/desorption. The effects of the synthesis condition and adsorption temperature were studied by dynamic adsorption experiment. The optimal adsorption temperature is 50 degrees C. The H2S adsorption results have showed that the optimal synthesis conditions are as follows: the ratio of silicon to aluminum and ratio of sodium to silicon are both 1.5, the ratio of water to sodium is 30, crystallization temperature and crystallization time is 90 degrees C, 4h, respectively. The breakthrough and saturation sulfur sorption capacities of zeolite synthesized under optimum conditions are up to nearly 10 and 15 mg/g-sorbent, respectively, and the H2S removal rate is nearly 100%. The adsorption kinetics nonlinear fitting results show that the adsorption system follows Bingham model. These results indicate that 4A molecular sieve zeolite synthesized from attapulgite can be used for H2S removal promisingly. (C) 2016 Elsevier B.V. All rights reserved.
机译：在这项工作中，由凹凸棒石（ATP）在不同条件下合成了4A分子筛沸石，并将其最初用于脱除H2S。通过扫描电子显微镜，X射线衍射，傅立叶变换红外光谱和N-2吸附/解吸对吸附剂进行表征。通过动态吸附实验研究了合成条件和吸附温度的影响。最佳吸附温度为50℃。H2S吸附结果表明，最佳合成条件如下：硅铝比和钠硅比均为1.5，水钠比为30，结晶温度和结晶时间分别为90℃，4h。在最佳条件下合成的沸石的突破和饱和硫吸附能力分别高达近10和15 mg / g吸附剂，并且H2S去除率接近100％。吸附动力学非线性拟合结果表明，吸附系统遵循Bingham模型。这些结果表明，由凹凸棒土合成的4A分子筛沸石有望用于脱除H2S。 （C）2016 Elsevier B.V.保留所有权利。

著录项

  • 来源
    《Journal of Hazardous Materials》 |2017年第15期|157-164|共8页
  • 作者

    Liu Xinpeng; Wang Rui;

  • 作者单位

    Shandong Univ, Sch Environm Sci & Engn, 27 Shanda South Rd, Jinan 250199, Peoples R China;

    Shandong Univ, Sch Environm Sci & Engn, 27 Shanda South Rd, Jinan 250199, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    4A molecular sieve; Zeolite; Attapulgite; H2S; Adsorption;

    机译：4A分子筛;沸石;凹凸棒石;H2S;吸附;

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