林业工程学报2018，Vol.3Issue(2)：40-46,7.DOI:10.13360/j.issn.2096-1359.2018.02.007
水蒸气活化制备竹质成型活性炭及其对二硫化碳的吸附性能
Preparation of bamboo molding activated carbon by steam activation and its adsorption performance on carbon disulfide
摘要
Abstract
As one of the important forestry renewable resources,bamboo is grown without pesticides or chemical fertil?izers,and plays a critical role in the balance of oxygen and carbon dioxide in the atmosphere. It grows rapidly and can be harvested in 3-5 years,which produces 35% more oxygen than an equivalent volume of trees.Bamboo can be used to prepare activated carbon instead of wood,which would save precious wood resources. In this study, the activated carbon with high adsorption performance was prepared from bamboo flour by the phosphoric acid activation and mold?ing before the steam activation. The properties of the activated carbon were characterized by the iodine adsorption val?ue,methylene blue adsorption value,N2adsorption?desorption isotherm,carbon disulfide dynamic adsorption capaci?ty,et al. The results showed that the optimum preparation condition was the phosphoric acid impregnation ratio of 1.2:1,activation time of 20 min,activation temperature of 450℃,steam activation temperature of 875℃,activation time of 1 h and flow rate of 3.0 mL/min. Under these conditions, the activated carbon had the BET specific surface area of 1 264.60 m2/g,total pore volume of 1.227 cm3/g,average pore size of 3.88 nm,iodine adsorption value of 1 452.96 mg/g,methylene blue adsorption value of 307.5 mg/g,strength of 91.76% and yield of 30.42%. Under the dynamic drying and 30% relative humidity conditions,the unit mass adsorption of activated carbon on carbon disulfide were 0.416 g/g and 0.390 g/g,respectively. The adsorption capacity of the activated carbon on carbon disulfide was mainly related to the pore structure of the activated carbon. The activated carbon with high micropores,small average pore diameter and high iodine adsorption value were more favorable for the adsorption of carbon disulfide. Due to the relatively low apparent density of bamboo, the strength of the prepared activated carbon was inferior to the coconut shell activated carbon.关键词
活性炭/竹质成型活性炭/水蒸气二次活化/吸附性能Key words
activated carbon/bamboo molding activated carbon/steam reactivation/adsorption performance分类
农业科技引用本文复制引用
许伟,孙康,缪存标,王傲,宋曜光,刘军利..水蒸气活化制备竹质成型活性炭及其对二硫化碳的吸附性能[J].林业工程学报,2018,3(2):40-46,7.基金项目
"十二五"国家科技支撑计划(2015BAD14B06). （2015BAD14B06）
