Investigation of waste metalworking fluids sludge pyrolysis for characterization of pyrolysis oil and char properties
文献类型： 外文期刊
作者： Zuo, Wu 1 ; Jin, Baosheng 2 ; Huang, Yaji 2 ; Xie, Zhikai 3 ;
作者机构： 1.Jiangsu Prov Acad Environm Sci, Jiangsu Key Lab Environm Engn, Nanjing 210036, Jiangsu, Peoples R China
2.Southeast Univ, Sch Energy & Environm, Minist Educ, Key Lab Energy Thermal Convers & Control, Nanjing 210036, Jiangsu, Peoples R China
3.Chongqing Liyang Haas Environm Engn Co Ltd, Chongqing 404100, Peoples R China
关键词： Waste metalworking fluids;Industrial sludge;Pyrolysis;Products yield;Component distribution;Pore parameters
期刊名称：JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS （ 影响因子：5.541； 五年影响因子：5.259 ）
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收录情况： SCI
摘要： Widespread use of metalworking fluids has hindered the treatment of sludge discharged from waste metalworking fluid (WMF) treatment plants. Here, a fixed-bed reactor was used to investigate the product distribution, pyrolysis oil, and char properties of biochemical sludge (BS) and physicochemical sludge (PCS) from a WMF treating plant after pyrolization at 300-700 degrees C. Thermogravimetric analyses (TGA) showed that the main pyrolytic decomposition stage of BS and PCS was 200-600 degrees C. Moreover, TGA, Fourier infrared spectrometry, and X-ray fluorescence spectroscopy revealed abundant CaO in PCS. The obtained pyrolysis oil could be separated into bottom phase oil (BPO) and top phase oil (TPO) for both BS and PCS. The maximum TPO yield of 18.78 wt% and TPO calorific value of 45.4 MJ kg(-1) were obtained at 500 degrees C for BS pyrolysis, while they were 18.93 wt% and 46.3 MJ kg(-1) at 600 degrees C for PCS pyrolysis. Gas chromatography/Mass spectrometry revealed that aromatic compounds (AOC) and hydrocarbons (HC) were the dominant groups of TPO of both BS and PCS pyrolysis. The highest Brunauer, Emmett and Teller (BET) surface area of char from BS and PCS was 155.8 and 165 m(2)/g at 500 degrees C, respectively. The differences in HC and AOC apparent yield variation of TPO and the residual char pore characteristics obtained from BS and PCS at 500-700 degrees C may reflect the lower fixed carbon content and higher CaO content of PCS. Overall, pyrolysis BS and PCS have the potential to recover a considerable amount of bio-oil and residual char from wastewater, which could be used as alternative fuel and activated carbon, respectively. (C) 2015 Elsevier B.V. All rights reserved.
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