When does molybdenum oxide equal molybdenum hexacarbonyl?: Relations between heterogeneous and homogeneous molybdenum catalysts in syngas catalysis

Sapienza, R.S.; Slegeir, W.; Mahajan, Devinder

doi:10.1016/s0277-5387(00)84918-9

Cited by 13 publications

(5 citation statements)

References 21 publications

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“…Thus, if a catalyst which is highly active at low temperatures is available and the heat of reaction is efficiently removed, methanol production with high per-pass conversion could be achieved. Slurry-phase methanol synthesis using alkali metal alkoxide and copper-based compound as a catalyst has been investigated by several researchers [184][185][186][187][188]. In this system, methanol is considered to be formed through the formation of methyl formate by the following two reactions (eqns.…”

Section: Ch3oh → Ch3och3 + H2omentioning

confidence: 99%

Applications and Preparation Methods of Copper Chromite Catalysts: A Review

Прасад

2011

Bull. Chem. React. Eng. Catal.

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In this review article various applications and preparation methods of copper chromite catalysts have been discussed. While discussing it is concluded that copper chromite is a versatile catalyst which not only catalyses numerous processes of commercial importance and national program related to defence and space research but also finds applications in the most concerned problem worldwide i.e. environmental pollution control. Several other very useful applications of copper chromite catalysts are in production of clean energy, drugs and agro chemicals, etc. Various preparation methods about 15 have been discussed which depicts clear idea about the dependence of catalytic activity and selectivity on way of preparation of catalyst. In view of the globally increasing interest towards copper chromite catalysis, reexamination on the important applications of such catalysts and their useful preparation methods is thus the need of the time. This review paper encloses 369 references including a well-conceivable tabulation of the newer state of the art.

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Section: Ch3oh → Ch3och3 + H2omentioning

confidence: 99%

Applications and Preparation Methods of Copper Chromite Catalysts: A Review

Прасад

2011

Bull. Chem. React. Eng. Catal.

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“…The catalyst for step (2.5) is often modified copper solid catalyst. The BNL method is an effective route for low temperature methanol synthesis from syngas and its reaction path is also similar to the steps mentioned above [25][26][27][28][29], assigned to Brookhaven National Laboratory. The BNL catalyst is derived from coexisting nickel acetate, tertamyl alcohol, and sodium hydride.…”

Section: Methanol Synthesis From Different Feed Gasmentioning

confidence: 99%

A New Method of Low Temperature Methanol Synthesis

Yang

Meng

et al. 2009

Catal Surv Asia

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Low temperature methanol synthesis is a promising technique for the practical methanol industry. New developments of a new kind of low temperature methanol synthesis were reviewed, including the effects of feed gas, reaction solvent, supercritical media and catalyst modification. The reaction mechanism and kinetics were also summarized primarily. Carbon dioxide played an important role in this new kind of low temperature methanol synthesis. It reacted with hydrogen adsorbed on catalyst surface to form HCOOM, an important reaction intermediate. Alcohol solvent in the low temperature methanol synthesis performed not only a media, but also a homogeneous catalyst. The reaction of the adsorbed formate species with alcohol on Cu/ZnO catalyst surface proceeded according to the Rideal mechanism rather than Langmuir-Hinshelwood mechanism to form alkyl formate. The formation of alkyl formate from alcohol solvent and hydrogenation of such an alkyl formate were the key steps in low temperature methanol synthesis reaction. These results provided new insights into low temperature methanol synthesis.

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“…The low temperature methanol synthesis concept has been the subject of research by several groups [9][10][11][12][13][14][15] since our initial reports on slurry-phase Ni and Ni-Mo bimetallic systems appeared [18]. We subsequently designed the Ni(CO) 4 /KOMe homogeneous system and developed its kinetic model shown in section 3.2.…”

Section: Mechanistic Considerationsmentioning

confidence: 99%

Atom-economical reduction of carbon monoxide to methanol catalyzed by soluble transition metal complexes at low temperatures

Mahajan

2005

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Hydrocarbons and methanol are considered the preferred products of catalytic reduction of carbon monoxide derived from clean natural gas. In this paper, we focus on atom-economical synthesis of methanol catalyzed by soluble transition metal complexes as single-site catalyst precursors under mild reaction conditions. Of the metal systems reported in the literature, Ni complexes activated by alkoxide bases affected homogeneous CO reduction to methanol at low temperatures (80°-130°C) and low pressures (2000-5000 kPa) to achieve CO conversion and methanol selectivity of >90% and >95%, respectively. The involvement of mono-and multi-nuclear Ni species that readily interconvert under methanol producing conditions is invoked. A process based on such an active catalyst system would position methanol to be considered an inexpensive feedstock for the synthesis of other derivatives.

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When does molybdenum oxide equal molybdenum hexacarbonyl?: Relations between heterogeneous and homogeneous molybdenum catalysts in syngas catalysis

Cited by 13 publications

References 21 publications

Applications and Preparation Methods of Copper Chromite Catalysts: A Review

Applications and Preparation Methods of Copper Chromite Catalysts: A Review

A New Method of Low Temperature Methanol Synthesis

Atom-economical reduction of carbon monoxide to methanol catalyzed by soluble transition metal complexes at low temperatures

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