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001-es BibID:	BIBFORM019259
Első szerző:	Jószai István (vegyész)
Cím:	Hydrogenation of aqueous mixtures of calcium carbonate and carbon dioxide using a water-soluble rhodium(I)-tertiary phosphine complex catalyst / Jószai István, Joó Ferenc
Dátum:	2004
ISSN:	1381-1169
Megjegyzések:	Aqueous suspensions of calcium carbonate were hydrogenated to yield calcium formate under a gas phase containing both H-2 and CO2. A rhodium(I)-complex of monosulforated tripherylphosphine (mtppms), RhCl(mtppms)(3) was used as catalyst. Reaction temperatures were in the range of 20-70degreesC, total pressure 10-100 bar with an optimum p(CO2):p(H-2) ratio of 1:4. Due to the mobile bicarbonate-formate equilibrium. the highest available formate concentration is decreased with increasing temperature but increased with increasing pressure. Interestingly. at 50degreesC and 100 bar total pressure the yield of formate was 143% (based on CaCO3) which implies the formation of free formic acid in the reaction of CO2 from the gas phase. The dependence of the hydrogenation rate on the catalyst and ligand concentrations, as well as that of the decomposition of formate as a function of temperature were also studied. (C) 2004 Elsevier B.V. All rights reserved.
Tárgyszavak:	Természettudományok Kémiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban
Megjelenés:	Journal Of Molecular Catalysis A-Chemical. - 224 : 1-2 (2004), p. 87-91. -
További szerzők:	Joó Ferenc (1949-) (vegyész)
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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