文献类型：期刊文献

英文题名：A carbon silica composite prepared from water slurry coal gasification slag

作者：Gu, Yu-yan[1];Qiao, Xiu-chen[1]

机构：[1]East China Univ Sci & Technol, Sch Resource & Environm Engn, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2019

卷号：276

起止页码：303

外文期刊名：MICROPOROUS AND MESOPOROUS MATERIALS

收录：;EI(收录号：20185106282610);WOS:【SCI-EXPANDED(收录号:WOS:000456639300033)】；

基金：The work described in this paper was funded by the National High Technology Research and Development Program (863 Program) (2011AA06A102) and Changshu Science and Technology Development Program (CR201706).

语种：英文

外文关键词：Micropore; Mesopore; Orthogonal experiment; Acid leaching

摘要：A large number of coal water slurry gasification slag (CWSGS) was discarded annually in China due to the promotion of clean coal technology. The fine slag (F-CWSGS) is abundant of silicates and unburned carbon. This research investigated the preparation of a porous carbon-silica composite (CSC) from F-CWSGS using KOH activation followed by hydrochloric acid leaching. The orthogonal experiments showed that optimum parameters for preparing CSC were: activating at 1173 K for 1 h, hydrochloric acid concentration of 20%, leaching at 363 K for 30 min. The acid concentration was remarkable for total surface area and acid leaching temperature was remarkable for both total surface area and total pore volume while had few effect on micropore formation. The formation of micropore is a diffusion controlled process and the formation of mesopore is a chemical reaction controlled process. When the KOH/F-CWSGS was 3, the prepared CSC had a BET surface area of 1347m(2)/g, a total pore volume of 0.69 cm(3)/g, the mesoporosity of 81% and an average slit-liked pore diameter of 3.44 nm.