摘要
针对新疆大量的生物质秸秆资源,尤其是棉花秸秆,在外热式炭化炉中炭化后比表面积不高、利用率低的问题,利用二次炭化的方法提高炭的比表面积。将干燥的棉秸秆在外热式炭化炉中以500℃炭化,再将炭化产物粉碎后分别在800℃和900℃的高温下,进行二次炭化,制得高活性生物质炭。同时,比较一次炭化产物、二次炭化不同温度产物的比表面积和吸附能力得出:温度越高,保温时间越长,制得炭的比表面积越大,吸附效果越好。实验结果表明:二次炭化有利于制得活性炭,提高生物质炭的经济价值。
The dry cotton straw carbonized in external heating carbonization furnace at 500℃followed by another step of carbonization respectively at 800 and 900 to obtain highly activated Biomass charcoal .Compared with the adsorptive prop-erties and carbon surface area of two different the carbonized product in different temperature .The main parameters tem-perature were studied .It was found that holding time ,adsorption capacities and Carbon surface area of carbonized prod-uct increased with increased temperature .The results indicate that this two-step carbonization process can obtain the acti-vated carbon beneficial .
出处
《农机化研究》
北大核心
2015年第9期176-179,共4页
Journal of Agricultural Mechanization Research
基金
国家自然科学基金项目(51365050)
关键词
棉花秸秆
二次炭化
生物质炭
炭比表面积
cotton stalk
secondary carbonization
biomass charcoal
carbon surface area
