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Titolo:
Influence of precursors of Li2O and MgO on surface and catalytic properties of Li-promoted MgO in oxidative coupling of methane
Autore:
Choudhary, VR; Mulla, SAR; Pandit, MY; Chaudhari, ST; Rane, VH;
Indirizzi:
Natl Chem Lab, Div Chem Engn, Poona 411008, Maharashtra, India Natl Chem Lab Poona Maharashtra India 411008 a 411008, Maharashtra, India
Titolo Testata:
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY
fascicolo: 9, volume: 75, anno: 2000,
pagine: 828 - 834
SICI:
0268-2575(200009)75:9<828:IOPOLA>2.0.ZU;2-1
Fonte:
ISI
Lingua:
ENG
Soggetto:
MAGNESIUM-OXIDE CATALYST; LITHIUM; C2-HYDROCARBONS; DIMERIZATION; CONVERSION; ACTIVATION; BASICITY; ETHANE;
Keywords:
oxidative coupling of methane; Li-promoted MgO; precursors of Li2O; precursors of MgO; influence of catalyst precursors;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Engineering, Computing & Technology
Citazioni:
29
Recensione:
Indirizzi per estratti:
Indirizzo: Choudhary, VR Natl Chem Lab, Div Chem Engn, Poona 411008, Maharashtra, India Natl Chem Lab Poona Maharashtra India 411008 rashtra, India
Citazione:
V.R. Choudhary et al., "Influence of precursors of Li2O and MgO on surface and catalytic properties of Li-promoted MgO in oxidative coupling of methane", J CHEM TECH, 75(9), 2000, pp. 828-834

Abstract

The influence of the catalyst precursors (for Li2O and MgO) used in the preparation of Li-doped MgO (Li/Mg=0.1) on its surface properties (viz basicity, CO2 content and surface area) and activity/selectivity in the oxidativecoupling of methane (OCM) process at 650-750 degrees C (CH4/O-2 feed ratio=3.0-8.0 and space velocity 5140-20550 cm(3) g(-1) h(-1)) has been investigated. The surface and catalytic properties are found to be strongly affected by the precursor for Li2O (viz Lithium nitrate, Lithium ethanoate and lithium carbonate) and MgO (viz magnesium nitrate, magnesium hydroxide prepared by different methods, magnesium carbonate, magnesium oxide and magnesium ethanoate). Among the Li-MgO (Li/MgO=0.1) catalysts, the Li-MgO catalyst prepared using lithium carbonate and magnesium hydroxide (prepared by the precipitation ti om magnesium sulfate by ammonia solution) and lithium ethanoate and magnesium acetate shows high surface area and basicity, respectively. The catalysts prepared using lithium ethanoate and magnesium ethanoate, and lithium nitrate and magnesium nitrate have very high and almost no CO2 contents, respectively. The catalysts prepared using Lithium ethanoate or carbonate as precursor for Li2O, and magnesium carbonate or ethanoate, as precursor for MgO, showed a good and comparable performance in the OCM process. The performance of the other catalysts was inferior. No direct relationship between the basicity of Li-doped MgO or surface area and its catalytic activity/selectivity in the OCM process was, however, observed. (C) 2000 Society of Chemical Industry.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 10:19:57