共查询到20条相似文献,搜索用时 62 毫秒
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论述了以炼厂石油焦为原料,采用以KOH为活化剂的化学活化法制备活性炭的成孔机理,同时根据成孔机理,对影响活性炭孔结构的因素进行了分析。 相似文献
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采用水蒸汽活化法制备了具有不同比表面积的PAN基活性炭纤维,并对其孔结构进行了较为详细的分析,结果表明,PAN基活性炭纤维孔结构以直径小于10A的微孔为主,孔径分布窄,D-R,D-A方程对其有良好的适用性。H-K法分析结果与D-R,D-A方程结果相一致。 相似文献
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A one-step steam pyrolysis scheme was applied, in the range 600–700°C, for the production of activated carbons from five lignocellulosic materials. The products were characterized by N2/77 K adsorption for evaluating their surface area and pore volume. Simple carbonization at 700 C resulted in poor adsorbing carbons whereas porosity was remarkably enhanced under action of steam. Carbon precursors derived from date palm wastes (branches, leaves and date pits) proved feasible raw materials that produced good adsorbing carbons. Rice husks and barbecue charcoal developed porosity to a lower extent, due to the inherent ash content. All obtained carbons were essentially microporous due to the limited gasification. Steam is suggested to play a double role: it promotes both the release of volatiles with partial devolatalization, and enhances carbon formation. 相似文献
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城市生活垃圾的优化处理技术 总被引:1,自引:0,他引:1
分析了城市生活垃圾的处理现状,运用循环经济、可持续发展的观点,对填埋、焚烧、堆肥、综合利用等城市生活垃圾主要处理技术进行比较,得出结论:综合利用处理技术是城市生活垃圾优化处理的有效措施。 相似文献
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A novel two-step procedure was used to manufacture microporous activated carbon from raw coconut shell. In this process, the raw coconut shell was (1) heated in an inert environment to temperatures between 450℃ and 850℃, and reacted with oxygen ( PO2=1.1-5.3kPa) for some time, and (2) heated again in inert environment to activation temperature(850℃) to produce an activated carbon. Activated carbons with specific surface area greater than 700m^2.g^-1 were manufactured with a yield between 24% and 28%. It was shown that the carbon had a narrow distribution of pore size, possibly less than lnm, which was calculated by a simple method based on local density function theory. 相似文献
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上海城市生活垃圾分类与垃圾产业 总被引:1,自引:0,他引:1
上海作为一个发展迅速的国际大都市,在各行各业高速发展的同时,却面对日益增多的城市生活垃圾无 法有效处理的难题。如何改变这种现状,并实现垃圾资源的可重复利用,就成为一个亟待解决的问题。有 效实行城市生活垃圾分类收集是实现垃圾产业化的基础。垃圾产业化不仅能够有效解决垃圾的处理问 题,而且资源的回收和利用亦将成为垃圾产业的一大亮点。在垃圾产业发展的同时也为缓解社会就业压 力提供了可能。 相似文献
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研究了污水处理厂污泥在制备泥质活性炭过程中的热解机理,利用热重(TG)分析仪和非等温技术对活化污泥的热解动力学进行了系统研究,分别对活化污泥低温热解段和中温热解段热失重微分(DTG)曲线峰值前后求解极限动力学参数和热解机理函数,结合Flynn-Wall-Ozawa法和Coats-Redfern法,采用双外推法确定了活化污泥的最概然热解机理函数. 结果表明,低温热解段DTG曲线峰值前后两部分的极限动力学参数反应活化能E和频率因子A分别为Ea?0=32.53 kJ/mol, lnAb?0=4.37;Ea?0=39.7 kJ/mol, lnAb?0=3.94(a为样品转化率,b为升温速率);中温热解段DTG峰值前后两部分的极限动力学参数分别为Ea?0=130.24 kJ/mol, lnAb?0=19.10;Ea?0=150.14 kJ/mol, lnAb?0=17.13. 活化污泥热解机理满足四阶段热解机理模型,热解机理依次为Mampel-Power法则(n=1/3)、3级化学反应、2级化学反应、Mampel-Power法则(n=3/2). 相似文献
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不同变质程度的煤制活性炭孔隙结构分析 总被引:5,自引:0,他引:5
在Autosorb—lC全自动物理化学吸附仪上使用N2和CO2对宁夏太西、山西大同和内蒙古准格尔3种不同变质程度的煤为原料制备的活性炭进行孔隙结构分析,用BET方程处理N2等温吸附数据,计算比表面积;用DFT法处理CO2等温吸附数据,进行微孔分析:用BJH法计算中孔孔径分布。从得出的结果可以看出,随着原料煤变质程度的加深,所制备的活性炭微孔和比表面积增大,超微孔、中孔体积变小,平均孔径变窄。分析结果表明。原料煤的性质是影响活性炭孔隙结构的主要因素。 相似文献
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