林产化学与工业2017，Vol.37Issue(6)：19-27,9.DOI:10.3969/j.issn.0253-2417.2017.06.003
活性炭上挥发性有机化合物的真空脱附
Vacuum Desorption of Volatile Organic Compounds from Activated Carbons
摘要
Abstract
In order to elucidate the patterns of vacuum desorption of volatile organic compounds( VOCs) from activated carbons, the vacuum desorption curves of the VOCs as a function of the temperature were investigated in a fixed bed by choosing 11 types of VOCs (including alkanes, aromatics, alcohols and ketones, and so on) of different chemical structures and molecular sizes. The results showed that vacuum desorption was a highly potential technology for recovering VOCs. Compared with conventional thermal desorption methods, vacuum desorption significantly reduced VOCs desorption temperatures, and allowed high desorption efficiency of greater than 99% and more reuse of activated carbons. The polar surfaces of activated carbon significantly weakened the desorption of alcohols while the non-polar surface was conducive. The surface property of activated carbons barely affected the desorption of the non-polar VOCs. Further, adsorbed alcohols molecules such as methanol and ethanol were arranged perpendicular to the surface of activated carbon in a way that hydroxyls of alcohols directly contacted with the carbon surface. This arrangement led to carboxyl groups of activated carbons prone to be removed or be changed into lactone in the vacuum thermal desorption process.关键词
活性炭/挥发性有机化合物/真空脱附/表面改性Key words
activated carbon/volatile organic compounds/vacuum desorption/surface modification分类
化学化工引用本文复制引用
左宋林,张杰,刘军利,孙康..活性炭上挥发性有机化合物的真空脱附[J].林产化学与工业,2017,37(6):19-27,9.基金项目
"十二五"国家科技支撑计划资助(2015BAD14B0601) （2015BAD14B0601）
