Markedly Improved CO2 Capture Efficiency and Stability of Gallium Substituted Hydrotalcites at Elevated Temperatures

被引：75

作者：

Yavuz, Cafer T. ^{[1
]}

Shinall, Brian D. ^{[2
]}

Iretskii, Alexei V. ^{[1
,2
,3
]}

White, Mark G. ^{[2
,4
]}

Golden, Tim ^{[5
]}

Atilhan, Mert ^{[1
,6
]}

Ford, Peter C. ^{[1
]}

Stucky, Galen D. ^{[1
]}

机构：

[1] Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA

[2] Georgia Inst Technol, Sch Chem & Biochem Engn, Atlanta, GA 30332 USA

[3] Lake Super State Univ, Div Chem Environm Sci Geol & Phys, Sault Ste Marie, MI 49783 USA

[4] Mississippi State Univ, Dave C Swalm Sch Chem Engn, Starkville, MS 39762 USA

[5] Air Prod & Chem Inc, Allentown, PA 18195 USA

[6] Qatar Univ, Dept Chem Engn, Doha, Qatar

来源：

CHEMISTRY OF MATERIALS | 2009年 / 21卷 / 15期

基金：

美国国家科学基金会;

关键词：

CARBON-DIOXIDE SEPARATION; HYDROXIDE MINERALS; ANION-EXCHANGE; REACTIVITY; ADSORPTION; SYSTEMS;

D O I：

10.1021/cm900834g

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：

A study was conducted to investigate improved CO2 capture efficiency and stability of gallium substituted hydrotalcites at elevated temperatures. Gallium substituted hydrotalcites (Ga-SHT) were prepared by a procedure slightly modified from the conventional hydrotalcite synthesis. Ga-SHT were customized by stirring a 1 g portion of the material in 50 mL of water containing 2.0 M potassium carbonate for 2 hours before removing the water at 70 °C under a slight vacuum. The SHTs were also converted into the CO2 adsorbents by calcining at 400 °C in an inert gas atmosphere. The CO2 experiments were conducted at 200 °C and the CO2 partial pressure was 0.7 atm. The CO2 adsorption capacities were obtained using a thermal gravimetric apparatus (TGA) to measure weight gain under a dry gas stream containing CO2 and an inert gas.

引用

页码：3473 / 3475

页数：3

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