以气化渣为原料制备浮选精炭

Q3 Energy
Peng ZHAO , Gang WANG , Li-hong KOU , Hao WANG , Min LIU , Peng HUANG , Zhen CUI
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引用次数: 0

摘要

煤气化渣的高效环保利用是目前煤化工领域的研究热点。以气化渣浮选精制炭、长焰煤、含70%沥青的高温煤焦油和适当比例的活性剂为原料制备活性炭。在管式炉上研究了活化温度和活化时间对活性炭表面性能和抗压强度的影响。采用红外光谱(FT-IR)、氮气吸附-解吸、扫描电镜(SEM)和碘吸附等手段对活性炭的氧官能团、孔隙结构和吸附性能进行了表征。验证了所制活性炭对生化废水中COD的去除效果。结果表明,以气化渣浮选精炭为原料的活化温度和活化时间是孔隙有效形成和膨胀的关键因素。经550℃炭化30 min, 950℃蒸汽活化2 h制备的活性炭具有有机碳组分和矿物的纵横交错形态。比表面积为566 m2/g,孔容量为0.5611 mL/g,平均孔径为5.1 nm,具有孔隙分布集中和一定量中孔的特点。碘值(650 mg/g)和亚甲基蓝值(128 mg/g)均符合中国标准《工业废水净化用活性炭技术规范及试验方法》的要求。在料液比为0.6 g/L的条件下,活性炭处理生化废水60 min后,COD可降至30 mg/L以下,达到国家标准《水污染物综合排放标准》(DB11/307-2013) B类水质标准。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Preparation of flotation refined carbon from gasification slag

Highly efficient and environmentally friendly utilization of coal gasification slag is a hot research subject in the coal chemical industry at present. The preparation of activated carbon with a flotation refined carbon from gasification slag, a long flame coal, a high temperature coal tar containing 70% asphalt and an active agent in proper proportion was carried out. The influence of activation temperature and time on the surface properties and compressive strength of the produced activated carbon was investigated in a tube furnace. The oxygen functional group, pore structure and absorption performance of the produced activated carbon were characterized by FT-IR, N2 adsorption-desorption, SEM and iodine adsorption. The COD removal from biochemical waste water by the produced activated carbon was verified. The results show that the key factors for the effective formation and expansion of pore are the suitable activation temperature and time for the floatation refined carbon from gasification slag as the feedstock. The activated carbon prepared by carbonization at 550 °C for 30 min and steam activation at 950 °C for 2 h exhibits a crisscross morphology of organic carbon components and minerals. The surface area, pore capacity and average pore diameter are 566 m2/g, 0.5611 mL/g and 5.1 nm, respectively, with the characteristics of a concentrated pore distribution and a certain quantity of mesopore. Both iodine value (650 mg/g) and methylene blue value (128 mg/g) meet the requirements of the Chinese standard “Technical Specifications and Test Methods of Activated Carbon for Purification of Industrial Wastewater”. The COD in biochemical waste water treated by the activated carbon for 60 min with a solid-to-liquid ratio of 0.6 g/L can be reduced to lower than 30 mg/L, meeting the B class water quality of the Chinese standard “Integrated Discharge Standard of Water Pollutants” (DB11/307—2013).

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来源期刊
燃料化学学报
燃料化学学报 Chemical Engineering-Chemical Engineering (all)
CiteScore
2.80
自引率
0.00%
发文量
5825
期刊介绍: Journal of Fuel Chemistry and Technology (Ranliao Huaxue Xuebao) is a Chinese Academy of Sciences(CAS) journal started in 1956, sponsored by the Chinese Chemical Society and the Institute of Coal Chemistry, Chinese Academy of Sciences(CAS). The journal is published bimonthly by Science Press in China and widely distributed in about 20 countries. Journal of Fuel Chemistry and Technology publishes reports of both basic and applied research in the chemistry and chemical engineering of many energy sources, including that involved in the nature, processing and utilization of coal, petroleum, oil shale, natural gas, biomass and synfuels, as well as related subjects of increasing interest such as C1 chemistry, pollutions control and new catalytic materials. Types of publications include original research articles, short communications, research notes and reviews. Both domestic and international contributors are welcome. Manuscripts written in Chinese or English will be accepted. Additional English titles, abstracts and key words should be included in Chinese manuscripts. All manuscripts are subject to critical review by the editorial committee, which is composed of about 10 foreign and 50 Chinese experts in fuel science. Journal of Fuel Chemistry and Technology has been a source of primary research work in fuel chemistry as a Chinese core scientific periodical.
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