Characteristics of using layered double hydroxides to reduce the VOCs from bituminous materials
Characteristics of using layered double hydroxides to reduce the VOCs from bituminous materials
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使用层状双氢氧化物降低沥青材料VOCs的特点
DOI：
10.1016/j.conbuildmat.2016.06.117
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发表时间：
2016-10-01
影响因子：
7.4
通讯作者：
Xiao, Y.
中科院分区：
文献类型：
--
作者：
Cui, P. Q.;Zhou, H. G.;Xiao, Y.
采用热重-质谱仪(TG-MS)对沥青原料挥发性有机化合物(VOCs)中的各种分子进行了检测和分析。研究了层状双氢氧化物(LDHs)添加剂作为VOCs缓蚀剂的效果。通过TG-MS分析，得到了沥青粘结剂挥发性成分的离子直方图。分析结果表明，环境温度只对纯沥青粘结剂中小分子的挥发特性有显著影响。环境温度对大分子和LDHs改性沥青粘结剂的挥发速度影响不大。对纯沥青和LDHs改性沥青的研究结果表明，LDHs改性剂具有降低VOC排放的潜力。不同的分子或组分的还原效果各不相同。对于较小的分子，这种对挥发速度的影响是显著的。与正辛烷相比，LDHs对更多致癌挥发性成分的挥发速度影响更大，对二氯乙烷和萘的挥发速度降低更明显。研究结果表明，对于所选择的粘结剂，LDH含量为4%是实现VOCs最佳减排效果的最佳选择，VOCs的减排效果为40%~60%。(C)2016爱思唯尔有限公司。保留所有权利。
Various types of molecules in the volatile organic compounds (VOCs) from bituminous materials were detected and analyzed by means of thermogravimetric-mass spectrometry (TG-MS) analysis. The effect of layered double hydroxides (LDHs) additives as VOCs inhibitor was also studied. The ion histogram of volatile components from bituminous binder was obtained through TG-MS analysis. Analysis results show that the environmental temperature has significant influence only on the volatile characteristics of smaller molecules in the pure bituminous binder. The effect of environmental temperature has been found marginal for the volatile speed of bigger molecules and LDHs modified bitumen binder. The obtained results regarding the pure bitumen and LDHs-modified bitumen demonstrate that LDHs modifiers have the potential to reduce VOC emissions. The reduction effect on different molecules or components varies. For smaller molecules, this effect on volatile speed is significant. LDHs affect the volatile speed of more carcinogenic volatile components to reduce more significantly for dichloroethane and naphthalene, compared with normal octane. The study findings indicate that a LDH percentage of 4% is an optimum for achieving the best emission reduction effect of VOCs for the selected binder, which is 40-60% percent reduction in VOCs. (C) 2016 Elsevier Ltd. All rights reserved.