含油污泥在ZSM-5沸石上催化热解产物特性  

Products obtained from catalytic pyrolysis of oily sludge over ZSM-5 zeolite

作　　者：林炳丞 王君[1] 黄群星[1] 池涌[1] LIN Bingcheng, WANG Jun, HUANG Qunxing, CHI Yong(State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, Zhejiang, Chin)

机构地区：[1]浙江大学热能工程研究所能源清洁利用国家重点实验室,浙江杭州310027

出　　处：《化工学报》2018年第6期2681-2687,共7页CIESC Journal

基　　金：国家自然科学基金项目(51576172);国家自然科学基金创新研究群体项目(51621005)~~

摘　　要：采用U型固定床管式炉研究了含油污泥在ZSM-5分子筛催化剂上的热解产物特性。发现在450℃下未使用催化剂热解时,GC-MS和GC测得的油泥热解油产物中的主要成分为烷烃和烯烃,芳烃含量较低;气体产物中主要为短链烃类,氢气产量较少。而在ZSM-5分子筛的催化作用下,热解油中芳香烃产量达到88.4%,气体产物中的氢气产量和短链烃类产量均明显增加。研究了400~550℃之间分子筛对含油污泥的催化效果,发现ZSM-5在500℃时催化效果最佳,油相产率达到65.6%,油相中的沥青质和胶质含量较低,芳香烃产量达到90.9%。通过热重和XPS分析发现分子筛上的积炭主要以多环芳烃焦炭的形式存在。Catalytic pyrolysis of oily sludge over ZSM-5 zeolite was carried out in a U type fixed-bed tubular reactor. Gas chromatography-mass spectrometry and gas chromatography were employed to investigate the properties of the pyrolysis oil and gas product, respectively. When pyrolysis was conducted without ZSM-5, the main components in the oil product were alkanes and alkenes, and the gas product was composed of short-chain hydrocarbons with little H2. The addition of ZSM-5 significantly increased the aromatics yield（88.4%） in the oil product. Meanwhile, the content of H2 and short-chain hydrocarbons increased as well. The effects of temperature on the catalytic effects of ZSM-5 were studied under 400—550 ℃. The results showed that 65.6% of oil can be recovered at 500 ℃ and the aromatics yield reached up to 90.9%. Moreover, the contents of resins and asphaltenes in the oil products were relatively low at this temperature. It can be deduced that the optimum catalytic temperature with ZSM-5 in this study was 500 ℃. The coke deposited on the catalyst was detected by thermogravimetric and X-ray photoelectron spectroscopy analysis. It was found that the main type of coke was polyaromatics coke due to the polycondensation reaction over ZSM-5.

关 键 词：含油污泥 分子筛 催化热解 芳香烃 积炭 

分 类 号：TE992.3[石油与天然气工程—石油机械设备]