摘要
采用氯化锌作为活化剂制备生物质活性炭,在不同的氯化锌质量分数、活化时间、活化温度条件下,对不同的生物质原料进行活化、碳化,以制备所得活性炭对亚甲基蓝的脱色量为指标,进行正交设计优化.利用吸附性能较好的生物质活性炭,对其进行汞吸附实验.结果表明,生物质活性炭制备的优化工艺条件为:氯化锌质量分数50%,活化时间1.5h,活化温度600℃.在此条件下,毛豆杆活性炭对亚甲基蓝的脱色量为0.15mg/g,对汞4h的吸附量为0.015mg,穿透率为5.30%.由此得出,受原料、活化剂质量分数、活化时间和活化温度等影响,各种活性炭对亚甲基蓝的吸附效率都不同,毛豆杆活性炭对模拟烟气中汞的吸附效果最好,这与其微孔极发达有关.
The conditions for preparation of biomass carbon were studied with zinc chloride as an activating agent.Orthogonal optimization design was carried out considering different zinc chloride concentration,carbonizing temperature and time as influential factors,using various biomass material to prepare activated carbon and taking the value of methylene blue adsorption as an optimization index.Then,the biomass activated carbon with better performance was adopted to implement mercury adsorption experiments.The results show that the methylene blue adsorption value of soybean stem activated carbon is 0.15 mg/g,the mercury adsorption capacity in 4 hours is 0.015 mg and the penetration rate is 5.30%,at an optimal condition of 600℃ activation temperature,1.5 hours activation time and 50% zinc chloride concentration.Therefore,the methylene blue adsorption efficiency by activated carbon is different because of the effect of raw materials,the activator concentration,activation time,activation temperature and so on.The mercury adsorption efficiency of soybean straw activated carbon is the highest because of its porosity.
出处
《上海理工大学学报》
CAS
北大核心
2013年第5期435-438,共4页
Journal of University of Shanghai For Science and Technology
基金
国家自然科学基金资助项目(50806041)
上海市科技创新行动计划资助项目(11dz1203402
12dz1201702
11dz1203400
12dz1201700)
上海市联盟计划资助项目(LM201251)
关键词
氯化锌
生物质
活性炭
吸附
zinc chloride
biomass
activated carbon
adsorption
