摘要
以甘蔗渣为原料,通过直接炭化、CO 2活化、H 3PO 4活化的方法制备3种不同的甘蔗基生物炭作为吸附材料,并通过扫描电镜(SEM)、孔径比表面积分析仪(BET)等进行表征,在固定吸附床上测试了不同甘蔗基生物炭对硫化氢(H 2S)和氨气(NH 3)吸附性能,并考察吸附温度、进气浓度、进气流量对甘蔗基生物炭吸附H 2S和NH 3的影响。结果表明,H 3PO 4活化制备的甘蔗基生物炭比表面积和总孔容最大,分别达到1181.038 m^(2)·g^(-1)和1.174 cm^(3)·g^(-1),提高吸附温度、进气浓度和进气流量均不利于甘蔗基生物炭对H 2S和NH 3的吸附去除。最佳的吸附工艺条件为吸附温度25℃,H 2S和NH 3进气浓度分别为30×10-6,进气流量为1000 mL·min^(-1),在此条件下甘蔗基生物炭对H 2S和NH 3的动态平衡吸附时间最长,动态平衡吸附量分别达到5.96、5.11 mg·g^(-1)。H 3PO 4活化制备的甘蔗基生物炭可应用于H 2S和NH 3的吸附,具有较好的应用前景。
Three different sugarcane-based biochars were prepared as adsorption materials by the methods of direct carbonization,CO 2 activation,and H 3PO 4 activation methods based on bagasse.The surface structure of sugarcane-based biochar was characterized by scanning electron microscopy(SEM)and pore size surface area analyzer(BET).The adsorption performance of different sugarcane-based biochars on hydrogen sulfide(H 2S)and ammonia(NH 3)was tested on a fixed adsorption bed,and the effects of the adsorption temperature,the pollutant concentration,and the intake flow rate on the adsorption of H 2S and NH 3 on sugarcane-based biochar were investigated.The results showed that the he sugarcane-based biochar prepared by the H 3PO 4 activation had the largest specific surface area and total pore volume,reaching 1181.038 m^(2)·g^(-1) and 1.174 cm^(3)·g^(-1),respectively.Increasing the adsorption temperature,intake air concentration and intake air flow rate were not conducive to the adsorption of H 2S and NH 3 by sugarcane-based biochar.The optimum adsorption process conditions were an adsorption temperature of 25℃,H 2S and NH 3 inlet concdntrations of 30×10-6,and an inlet gas flow rate of 1000 mL·min^(-1).Under these conditions,the sugarcane-based biochar had the longest dynamic equilibrium adsorption time for H 2S and NH 3,and the dynamic equilibrium adsorption amounts reached 5.96,5.11 mg·g^(-1),respectively.The sugarcane-based biochar prepared by H 3PO 4 activation can be applied to the adsorption of H 2S and NH 3,and had a good application prospect.
作者
刘明辉
唐子君
饶梓凌
方平
胡春华
LIU Minghui;TANG Zijun;Rao Ziling;FANG Ping;HU Chunhua(School of Resources and Environment,Nanchang University,Key Laboratory of Poyang Lake Environment and Resource Utilization,Ministry of Education,Nanchang 330031,China;South China Institute of Environmental Science,Ministry of Ecology and Environment,Guangdong Key Laboratory of Water and Air Pollution Prevention and Control,Guangzhou 510655,China;China Jiliang University,School of Quality and Safety Engineering,Hangzhou 310000,China)
出处
《南昌大学学报（理科版）》
CAS
北大核心
2023年第4期374-382,共9页
Journal of Nanchang University(Natural Science)
基金
中央级公益性科研院所基本科研业务专项(PM-zx703-202204-142)
生态环境部华南环境科学研究所优秀青年科技人才支持项目(PM-zx421-202104-104)。
