标题：Harvesting Capacitive Carbon by Carbonization of Waste Biomass in Molten Salts

作者：Yin, Huayi; Lu, Beihu; Xu, Yin; Tang, Diyong; Mao, Xuhui; Xiao, Wei;Wang, Dihua; Alshawabkeh, Akram N.

来源出版物：ENVIRONMENTAL SCIENCE & TECHNOLOGY 卷：48 期：14 页：8101-8108 DOI：10.1021/es501739v 出版年：JUL 15 2014

摘要：Conversion of waste biomass to value-added carbon is an environmentally benign utilization of waste biomass to reduce greenhouse gas emissions and air pollution caused by open burning. In this study, various waste biomasses are converted to capacitive carbon by a single-step molten salt carbonization (MSC) process. The as-prepared carbon materials are amorphous with oxygen-containing functional groups on the surface. For the same type of waste biomass, the carbon materials obtained in Na2CO3-K2CO3 melt have the highest Brunauer-Emmett-Teller (BET) surface area and specific capacitance. The carbon yield decreases with increasing reaction temperature, while the surface area increases with increasing carbonization temperature. A working temperature above 700 degrees C is required for producing capacitive carbon. The good dissolving ability of alkaline carbonate molten decreases the yield of carbon from waste biomasses, but helps to produce high surface area carbon. The specific capacitance data confirm that Na2CO3-K2CO3 melt is the best for producing capacitive carbon. The specific capacitance of carbon derived from peanut shell is as high as 160 F g(-1) and 40 mu F cm(-2), and retains 95% after 10000 cycles at a rate of 1 A g(-1). MSC offers a simple and environmentally sound way for transforming waste biomass to highly capacitive carbon as well as an effective carbon sequestration method.

入藏号：WOS:000339227500053

文献类型：Article

语种：English

扩展关键词：ACTIVATED CARBON; PARTICULATE MATTER; RENEWABLE FUELS; SUPERCAPACITORS; ENERGY; CHINA;

PYROLYSIS; PERFORMANCE; CONVERSION; CHEMICALS

通讯作者地址：Mao, Xuhui;Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

电子邮件地址：clab@whu.edu.cn; wangdh@whu.edu.cn

地址：

[Yin, Huayi; Lu, Beihu; Xu, Yin; Tang, Diyong; Mao, Xuhui; Xiao, Wei; Wang, Dihua] Wuhan Univ, Sch Resource & Environm Sci, Wuhan 430072, Peoples R China.

[Alshawabkeh, Akram N.] Northeastern Univ, Civil & Environm Engn Dept, Boston, MA02115 USA.

研究方向：Engineering; Environmental Sciences & Ecology

ISSN：0013-936X