Synthesis, characterization and high temperature CO2 capture capacity of nanoscale Ca-based layered double hydroxides via reverse microemulsion

被引：10

作者：

Chang, Po-Hsueh ^{[1
]}

Chang, Yen-Po ^{[1
]}

Lai, Yen-Ho ^{[1
]}

Chen, San-Yuan ^{[1
]}

Yu, Ching-Tsung ^{[2
]}

Chyou, Yau-Pin ^{[2
]}

机构：

[1] Natl Chiao Tung Univ, Dept Mat Sci & Engn, Hsinchu 300, Taiwan

[2] Inst Nucl Energy Res, Longtan 325, Taiwan

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 586卷

关键词：

Coprecipitation; CO2; absorption; Carbonation-calcination; Layered double hydroxide; NANOPARTICLES; SORBENTS;

D O I：

10.1016/j.jallcom.2013.05.213

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

In this study, we report a reverse microemulsion method to prepare stable homogeneous suspensions containing dispersed Ca-Al layered double hydroxide (LDH) nanoparticles. By changing the concentration, reaction time and temperature, the nano-particles with different structural morphology was developed from amorphous aggregation to platelet, regular hexagon and hydrangea-like hierarchical structure. The crystallization and growth of Ca-Al LDH nanoparticles were involved with a nucleation and growth process under nonaqueous polar solvent/surfactant system. After calcination at 700 degrees C, the calcined nano-sized Cal-Al LDH powders synthesized from the reverse microemulsion display remarkable CO2 capture behavior at 600 degrees C, which is strongly dependent on the reaction conditions (concentration, time and temperature). The calcined powder synthesized at 80 degrees C exhibits a faster rate of CO2 absorption and higher CO2 capture capacity of 44 wt% CO2 without apparent degradation under multiple cycles of carbonation-calcination. (C) 2013 Elsevier B. V. All rights reserved.

引用

页码：S498 / S505

页数：8

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