Homogeneous hydrogenation of carbon dioxide and bicarbonate in aqueous solution catalyzed by water-soluble ruthenium(II) phosphine complexes

被引：142

作者：

Elek, J

Nádasdi, L

Papp, G

Laurenczy, G

Joó, F

机构：

[1] Hungarian Acad Sci, Res Grp Homogeneous Catalysis, H-4010 Debrecen, Hungary

[2] Univ Debrecen, Inst Chem Phys, H-4010 Debrecen, Hungary

[3] Ecole Polytech Fed Lausanne, Inst Chim Mol & Biol, CH-1015 Lausanne, Switzerland

来源：

APPLIED CATALYSIS A-GENERAL | 2003年 / 255卷 / 01期

基金：

匈牙利科学研究基金会;

关键词：

carbon dioxide; hydrogenation; phosphine complexes; ruthenium; water-soluble;

D O I：

10.1016/S0926-860X(03)00644-6

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：

The water-soluble Ru(II)-phosphine complex, [{RuCl2(mTPPMS)(2)}(2)] was found a suitable catalyst for the hydrogenation of NaHCO3 to NaHCO2 in aqueous solution under mild conditions with catalyst turnover frequencies (TOFs) in the range of 35-50 h(-1) at 50degreesC and 10 bar total pressure. The suggested reaction mechanism involves the formation of Ru(II)-hydrides of the general formula [RuHX(mTPPMS)(4)] where X = H-, HCO3- or HCO2-. At 80degreesC and 95 bar total pressure, the reduction of NaHCO3 proceeded with high reaction rate (9600 h(-1)) hitherto unobserved in purely aqueous solutions. The reactions do not require the presence of organic amine additives, however, the addition of quinoline increased the rate considerably. Aqueous suspensions of calcium carbonate could also be hydrogenated with CO2/H-2 gas mixtures. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：59 / 67

页数：9

共 53 条

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