De-intercalation of the intercalated potassium in the preparation of activated carbons by KOH activation

被引：24

作者：

Wang, Wenwen ^{[1
]}

Xu, Shaoping ^{[1
]}

Wang, Kechao ^{[1
]}

Liang, Jia ^{[1
]}

Zhang, Wei ^{[1
]}

机构：

[1] Dalian Univ Technol, State Key Lab Fine Chem, Inst Coal Chem Engn, Sch Chem Engn, 2 Linggong Rd, Dalian 116024, Peoples R China

来源：

FUEL PROCESSING TECHNOLOGY | 2019年 / 189卷

基金：

中国国家自然科学基金;

关键词：

Activated carbon; Potassium; De-intercalation; Pore structure; Surface properties; CHEMICAL ACTIVATION; HYDROGEN; NAOH;

D O I：

10.1016/j.fuproc.2019.03.001

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

In this study, the potassium formed during the activation of petroleum coke with KOH as activation agent was quantified, and three de-intercalation reagents (acetic acid, water vapor, methanol) with different flow and at different temperature were used to de-intercalate the potassium. It is suggested that the activation process yields almost the same amount potassium in the free state as that in the potassium-graphite intercalation compounds. The results also indicated that the introduction of acetic acid (250 degrees C, 0.4ml/min), water vapor (200 degrees C, 0.4ml/min), methanol (150 degrees C, 0.4ml/min) could furthest improve the porosity and decrease the microcrystalline size as well as increase graphite layer spacing d(002.) Moreover, the de-intercalation reagents could accelerate the formation of oxygen-containing groups on the surface of the activated carbons. Based on these results, the deintercalation mechanism has been proposed.

引用

页码：74 / 79

页数：6

共 22 条

[1] Synthesis of activated carbons by chemical activation of new anthracene oil-based pitches and their optimization by response surface methodology [J].