Search | Engineering

订阅投稿

首页工程期刊工程焦点工程成就工程前沿关于我们 English

资源类型

期刊论文 2

年份

2020 1

2008 1

关键词

检索范围：

排序：展示方式：

Preparation and adsorption performances of mesopore-enriched bamboo activated carbon

WANG Yuxin, LIU Congmin, ZHOU Yaping

《化学科学与工程前沿（英文）》 2008年第2卷第4期页码 473-477 doi: 10.1007/s11705-008-0081-5

摘要： Activated carbon with high specific surface area and considerable mesopores was prepared from bamboo scraps by phosphoric acid activation. The effect of activation conditions was studied. Under the conditions of impregnating bamboo with 80% HPO at 80°C for 9 days and activation at 500°C for 4 h, the prepared activated carbon had the highest mesopore volume of 0.67 cm/g, a specific surface area of 1567 m/g, and the mesopore ratio reached 47.18%. The study on adsorption isotherms of CH, CO, N and O on the activated carbon were carried out at 298 K. The considerable difference in the adsorption capacity between CO and the other gases was observed, which would be of interest for the adsorptive separation/purification of gaseous CO from its mixtures, especially from mixtures with N and/or O.

关键词： mesopore volume gaseous considerable difference adsorption capacity activation

HTML PDF 收藏

Postsynthesis of hierarchical core/shell ZSM-5 as an efficient catalyst in ketalation and acetalization reactions

Peng Luo, Yejun Guan, Hao Xu, Mingyuan He, Peng Wu

《化学科学与工程前沿（英文）》 2020年第14卷第2期页码 258-266 doi: 10.1007/s11705-019-1878-0

摘要： Hierarchical core/shell Zeolite Socony Mobil-five (ZSM-5) zeolite was hydrothermally postsythesized in the solution of NaOH and diammonium surfactant via a dissolution-reassembly strategy. The silica and alumina species were firstly dissolved partially from the bulky ZSM-5 crystals and then were reassembled into the MFI-type nanosheets with the structure-directing effect of diammonium surfactant, attaching to the out-surface of ZSM-5 core crystals. The mesopores thus were generated in both the core and shell part, giving rise to a micropore/mesopore composite material. The micropore volume and the acidity of the resultant hybrid were well-preserved during this recrystallization process. Possessing the multiple mesopores and enlarged external surface area, the core/shell ZSM-5 zeolite exhibited higher activity in the ketalation and acetalization reactions involving bulky molecules in comparison to the pristine ZSM-5.

关键词： core/shell ZSM-5 in situ recrystallization mesopore ketalation and acetalization reactions