Theoretical studies on reactions of transition-metal complexes.

Increased demand for liquid transportation fuels coupled with gradual depletion of oil reserves and volatile petroleum prices have recently renewed interest in coal-to-liquids (CTL) technologies. Large recoverable global coal reserves can provide liquid fuels and significantly reduce dependence on oil imports. Direct coal liquefaction (DCL) converts solid coal (H/C ratio ≈ 0.8) to liquid fuels (H/C ratio ≈ 2) by adding hydrogen at high temperature and pressures in the presence or absence of catalyst. This review provides a comprehensive literature survey of the coal structure, chemistry and catalysis involved in direct liquefaction of coal. This report also touches briefly on the historical development and current status of DCL technologies. Key issues, challenges involved in DCL process and directions for the future research are also addressed.

Clean liquid fuels from direct coal liquefaction: chemistry, catalysis, technological status and challenges

We know of three routes that organisms have evolved to synthesize complex organic molecules from CO2: the Calvin cycle. the reverse tricarboxylic acid cycle, and the reductive acetyl-CoA pathway. This review describes the enzymatic steps involved in the acetyl-CoA pathway, also called the Wood pathway, which is the major mechanism of CO2 fixation under anaerobic conditions. The acetyl-CoA pathway is also able to form acetyl-CoA from carbon monoxide.There are two parts to the acetyl-CoA pathway: (1) reduction of CO2 to methyltetrahydrofolate (methyl-H4folate) and (2) synthesis of acetyl-CoA from methyl-H, folate, a carboxyl donor such as CO or CO2, and CoA. This pathway is unique in that the major intermediates are enzyme-bound and are often organometallic complexes. Our current understanding of the pathway is based on radioactive and stable isotope tracer studies, purification of the component enzymes (some extremely oxygen sensitive), and identification of the enzyme-bound intcrmediates by chroma...

Enzymology of the acetyl-CoA pathway of CO2 fixation.

Reagent and catalyst induced substitution reactions of metal carbonyl complexes

Erven J. Kuhlmann

Papers

Carbon monoxide insertion into transition metal-carbon sigma-bonds

Solubilization of Illinois bituminous coal: the critical importance of methylene group cleavage

Decarbonylation of acyliron compounds by group VIII metal complexes

Studies on the abstraction of small molecules from organometallic compounds by Rh(PPh3)3Cl

13C nuclear magnetic resonance study of Cyclopentadienyl iron acyls