原料灰分及脱灰工艺对KOH活化法制备活性炭的影响

发布时间：2018-05-21 16:27

本文选题：活性炭 + 煤直接液化残渣　；参考：《炭素技术》2016年02期

【摘要】：以煤直接液化残渣为原料,采用KOH化学活化法,考察了原料灰分及脱灰工艺对制备活性炭结构性能的影响。实验发现:煤直接液化残渣经脱灰预处理后,进行炭化活化,最后酸洗制备出的活性炭产品性能,相对直接用煤直接液化残渣为原料制得的活性炭,其碘吸附值减少了49.82 mg/g,炭收率提高了14.55%,灰分增加了0.38%;以脱灰残渣为原料,加入10%的Fe_2O_3,不仅能有效提高活性炭产品的吸附性能,而且在一定程度上能起到脱灰作用;用质量浓度5%的稀盐酸对煤液化残渣活化物进行脱灰处理,能得到灰分1.39%、碘吸附值1762.49 mg/g的高性能活性炭,如果用HF作进一步酸洗脱灰处理,能使活性炭碘吸附值提高73.27 mg/g,灰分降至0.72%。
[Abstract]:The influence of ash content and ash removal process on the structure and properties of activated carbon was investigated by KOH chemical activation method using coal liquefaction residue as raw material. The experimental results show that the activated carbon product which is prepared by acid pickling after the coal direct liquefaction residue has been decalcified and activated, compared with the activated carbon prepared by direct coal liquefaction residue as raw material. The adsorption value of iodine decreased by 49.82 mg / g, the yield of carbon increased by 14.55 and the ash content increased by 0.38. With the addition of 10% Fe _ 2O _ 2O _ 3 as raw material, the adsorption performance of activated carbon products was improved effectively, and to some extent the ash removal effect was also achieved. High performance activated carbon with ash content of 1.39 and iodine adsorption value of 1762.49 mg/g can be obtained by deashing coal liquefaction residue activator with 5% dilute hydrochloric acid by mass concentration. If HF is used as further acid pickling and deashing treatment, The iodine adsorption value of activated carbon was increased by 73.27 mg / g, and the ash content was decreased to 0.722%.
【作者单位】：中国神华煤制油化工有限公司上海研究院;大连理工大学炭素材料研究室;
【基金】：国家科技部863基金资助项目(No.2009AA05Z318)
【分类号】：TQ424.11

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