非碳基吸附剂高温捕集氯化铅蒸气

doi:10.16085/j.issn.1000-6613.2017-0114

化工进展 ›› 2017, Vol. 36 ›› Issue (09): 3508-3513.DOI: 10.16085/j.issn.1000-6613.2017-0114

非碳基吸附剂高温捕集氯化铅蒸气

夏文青¹, 黄亚继¹, 王昕晔², 查健锐¹, 杨钊¹, 王健¹, 徐力刚¹

1 东南大学能源热转换及其过程测控教育部重点实验室, 江苏南京 210096;
2 南京师范大学江苏省材料循环与污染控制重点实验室, 江苏南京 210042

收稿日期:2017-01-18 修回日期:2017-03-20 出版日期:2017-09-05 发布日期:2017-09-05
通讯作者: 黄亚继,教授,研究方向为大气污染控制和洁净煤燃烧技术。
作者简介:夏文青(1993-),女,硕士研究生,主要研究方向为大气污染控制
基金资助:
国家自然科学基金（51676040，51476031）及江苏省环保科研课题（2015013）。

Experimental study on high temperature adsorption of lead chloride by non-carbon adsorbents

XIA Wenqing¹, HUANG Yaji¹, WANG Xinye², ZHA Jianrui¹, YANG Zhao¹, WANG Jian¹, XU Ligang¹

1 Key Laboratory of Energy Thermal Conversion and Control of Ministry of Education, Southeast University, Nanjing 210096, Jiangsu, China;
2 Jiangsu Provincial Key Laboratory of Materials Cycling and Pollution Control, Nanjing Normal University, Nanjing 210042, Jiangsu, China

Received:2017-01-18 Revised:2017-03-20 Online:2017-09-05 Published:2017-09-05

摘要/Abstract

摘要： 垃圾焚烧技术的局限在于其产生的二次污染会给人类、环境带来危害，焚烧烟气中的铅是污染的源头之一，非碳基吸附剂捕集技术是这一领域的研究热点。本文结合我国垃圾成分中水含量大的特点，利用双温区水平管式炉系统考察4种非碳基吸附剂（高岭土、沸石、氧化钙、二氧化硅）在有水蒸气和无水蒸气条件下对氯化铅蒸气的吸附性能，重点探究了高岭土对氯化铅蒸气的吸附规律及机理。结果表明：在氧气无水蒸气氛围下，4种吸附剂的铅吸附能力依次为高岭土 > 氧化钙 > 沸石 > 二氧化硅，吸附剂的化学组成和结构共同决定其吸附性能；在氧气有水蒸气氛围下，高岭土的吸附能力显著提高，而水对其他3种吸附剂的吸附能力影响不大；对于高岭土而言，利用X射线衍射（XRD）表征发现，两种氛围下的吸附产物均为PbAl₂Si₂O₈；通过对比高岭土吸附前后的扫描电子显微镜及X射线能谱仪（SEM-EDS）图谱，发现有水氛围下样品的整个表面都呈熔融状，与原始高岭土、无水氛围下高岭土的表面形成强烈对比，是水分的影响在其微观形貌上的体现；水分对高岭土铅吸附能力的促进作用可能在于：①水能参与吸附反应，②水的存在促进了高岭土表面共晶融化，使得吸附增强。700~900℃时，在两种氛围中温度升高均有利于吸附，氧气无水氛围中的高岭土吸附效率在20%~40%，氧气有水氛围中的高岭土吸附效率在75%~85%。

关键词: 垃圾焚烧, 吸附剂, 吸附作用, 固定床, 氯化铅

Abstract: The limitation of waste incineration technology is that the secondary pollution it caused will bring harm to human beings and environment. As lead in flue gas is one of the pollution sources,the study of non carbon based adsorbent arises concern in this field. Since the moisture rate of waste is high in China,fixed bed reactor was used to investigate the lead chloride adsorption properties of kaolin,zeolite,calcium oxide and silica in the atmosphere with and without moisture. Then the adsorption behavior of kaolin was further discussed. The results showed that kaolin has the highest adsorption capacity,followed by calcium oxide,zeolite and silicon dioxide in pure oxygen without moisture. Both chemical composition and structure determine the adsorption efficiency. In the atmosphere of oxygen and moisture,the capacity of kaolin is improved significantly. Moisture has great effects on kaolin,but has little effects on the other three adsorbents. The X-ray diffraction(XRD) results of kaolin showed that the adsorption products in two kinds of atmosphere were both PbAl₂Si₂O₈. By comparing the scanning electron microscope and energy dispersive spectrometer(SEM-EDS) results of kaolin,it was found that the whole surface of the kaolin after adsorption is in a molten state at the atmosphere of oxygen and moisture,which is in sharp contrast to the surface of kaolin in another atmosphere. The role moisture plays in the adsorption of kaolin could be explained as follows:① moisture can participate in the adsorption reaction;② moisture promotes the melting of kaolin,which makes adsorption easier. When the temperature at 700-900℃,higher temperature is beneficial to kaolin adsorption,the efficiency ranges from 20% to 40% in oxygen atmosphere without moisture,and ranges from 70% to 85% in oxygen atmosphere with moisture.

Key words: waste incineration, adsorbent, adsorption, fixed-bed, lead chloride

中图分类号:

X511

夏文青, 黄亚继, 王昕晔, 查健锐, 杨钊, 王健, 徐力刚. 非碳基吸附剂高温捕集氯化铅蒸气[J]. 化工进展, 2017, 36(09): 3508-3513.

XIA Wenqing, HUANG Yaji, WANG Xinye, ZHA Jianrui, YANG Zhao, WANG Jian, XU Ligang. Experimental study on high temperature adsorption of lead chloride by non-carbon adsorbents[J]. Chemical Industry and Engineering Progress, 2017, 36(09): 3508-3513.

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非碳基吸附剂高温捕集氯化铅蒸气

Experimental study on high temperature adsorption of lead chloride by non-carbon adsorbents

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