%0 Journal Article
%T Surface Characteristics of Alkali Modified Activated Carbon and the Adsorption Capacity of Methane<br>碱改性活性炭表面特征及其吸附甲烷的研究
%A ZHANG Meng-zhu
%A LI Lin
%A LIU Jun-xin
%A SUN Yong-jun
%A LI Guo-bin
%A <br>张梦竹
%A 李琳
%A 刘俊新
%A 孙永军
%A 李国滨
%J 环境科学
%D 2013
%I 
%X Coconut shell based activated carbon was modified by alkali with different concentrations. The surface structures of tested carbons were observed and analyzed by SEM and BET methods. Boehm's titration and SEM/EDS methods were applied to assay the functional groups and elements on the carbon surface. The adsorption of methane on tested carbons was investigated and adsorption behavior was described by the adsorption isotherms. Results showed that surface area and pore volume of modified carbon increased and surface oxygen groups decreased as the concentration of the alkali used increased, with no obvious change in pore size. When concentration of alkali was higher than 3.3 mol·L-1, the specific surface area and pore volume of modified carbon was larger than that of original carbon. Methane adsorption capacity of alkali modified carbon increased 24%. Enlargement of surface area and pore volume, reduction of surface oxygen groups will benefit to enhance the methane adsorption ability on activated carbon. Adsorption behavior of methane followed the Langmuir isotherm and the adsorption coefficient was 163.7 m3·mg-1.
%K activated carbon
%K methane
%K surface modification
%K adsorption
%K surface characterization<br>活性炭
%K 甲烷
%K 表面改性
%K 吸附性能
%K 表面特性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=64CD0AA99DD39F69401C615B85F123EF&aid=9C65539B20E123FCF2BCCF4CB1A5B8A7&yid=FF7AA908D58E97FA&vid=339D79302DF62549&iid=CA4FD0336C81A37A&sid=7C3A4C1EE6A45749&eid=1AE5323881A5ECDC&journal_id=0250-3301&journal_name=环境科学&referenced_num=0&reference_num=26