改性SAPO-34分子筛对模型油中二氯乙烷的脱除

doi:10.16085/j.issn.1000-6613.2017-0055

摘要/Abstract

摘要： 采用吸附法对模型油中二氯乙烷的脱除进行研究。以SAPO-34分子筛为载体，以Ni²⁺、Cu²⁺、Mg²⁺、Zn²⁺为活性组分，利用等体积浸渍法制得不同金属离子改性的SAPO-34分子筛吸附剂。采用低温氮气吸附-脱附（BET）、X射线衍射（XRD）和氨吸附及程序升温脱附（NH₃-TPD）对吸附剂进行了表征，考察了5种吸附剂对二氯乙烷的吸附脱氯效果及金属负载量对脱氯效果的影响，得到了最优吸附剂，同时考察了脱氯实验的吸附条件对脱氯效果的影响，得到了最佳吸附条件，最后研究了吸附剂的再生能力。结果表明：Ni/SAPO-34分子筛的吸附脱氯效果较好，并且有很好的再生能力，其吸附效果的最佳条件为镍金属离子的负载量为4%，吸附温度为20℃，剂油比为1∶30，吸附时间为50min。这一研究为真实油中有机氯化物的脱除提供了经验和依据。

关键词: 模型油, 二氯乙烷, 吸附剂, SAPO-34分子筛

Abstract: Removal of dichloroethane in the model oil was studied by the means of adsorption. The modified SAPO-34 zeolite adsorbents with different metal ions were prepared by saturated impregnation with SAPO-34 zeolite as carrier,and Ni²⁺,Cu²⁺,Mg²⁺,Zn²⁺ metal ions as the active components. The adsorbents were characterized by means of low temperature nitrogen adsorption-desorption(BET),X-ray diffraction(XRD),ammonia adsorption and temperature-programmed desorption(NH₃-TPD). The adsorption dechlorination effect of the five adsorbents as well as the dechlorination effect of loading amount of the metal ions were investigated,then the optimum adsorbents and the optimum adsorption conditions were obtained. Finally,the regeneration ability of the adsorbent was studied. The results show that Ni/SAPO-34 zeolite has both good adsorption dechlorination and regeneration ability,and the optimum adsorption conditions are as follows:the loading amount of Ni²⁺ is 4%,adsorption temperature is 20℃,the ratio of catalyst to oil is 1∶30,and the adsorption time is 50min. This study provides foundation for the removal of organic chlorides in real oil.

Key words: model oil, dichloroethane, adsorbent, SAPO-34 zeolites

中图分类号:

TE626

李晶晶, 李瑞丽, 蒋善良, 常卫科. 改性SAPO-34分子筛对模型油中二氯乙烷的脱除[J]. 化工进展, 2017, 36(10): 3730-3736.

LI Jingjing, LI Ruili, JIANG Shanliang, CHANG Weike. Removal of dichloroethane in model oil with modified SAPO-34 zeolites[J]. Chemical Industry and Engineering Progress, 2017, 36(10): 3730-3736.

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