Reactions of small molecules with transition metal nanoparticles have attracted considerable interest over the past decades since they can provide a conceptual framework for applications such as heterogeneous catalysis and hydrogen storage . The reaction of H2 and CO with Fe and Co nanoparticles has been widely studied due to the relevance to the Fischer-Tropsch process in which a mixture of H2...

Upgrading C1 chemicals (for example, CO, CO/H2, MeOH and CO2) with C-C bond formation is essential for the synthesis of bulk chemicals. In general, these industrially important processes (for example, Fischer Tropsch) proceed at drastic reaction conditions (>250 °C; high pressure) and suffer from low selectivity, which makes high capital investment necessary and requires additional purification...

Large-scale biofuel production plants require an efficient gasification process that generates syngas of high quality (with minimal gas contaminants and inert gases) to minimize the extent cleaning processes required for liquid production. This work presents modeling chemical looping (CLG) The CLG is integrated with a Fischer–Tropsch synthesis (FTS) produce (FT) crude net-negative CO2 emissions...

A series of x(Co, Mn)/TiO2 catalysts (x=2–12wt.%) containing 25%Co and 75%Mn were prepared by the co-impregnation method. All prepared catalysts have been tested in Fischer-Tropsch synthesis for production of C2-C4 olefins. It was found that the catalyst containing 8wt.%(Co,Mn)/TiO2 is an optimal catalyst for production of C...

The role of lanthanides as promoters on cobalt-based catalysts for Fischer-Tropsch synthesis was evaluated under relevant biomass-derived syngas mixtures. Cerium, lanthanum and a combination them were impregnated an industrial micro-catalyst. Lanthanide incorporation did not affect significantly the morphology catalyst, although it reduced available surface cobalt. Catalytic tests revealed that...

Multiplicity of steady states was experimentally obser®ed, somewhat sporadically, for ( ) Fischer Tropsch FT synthesis in stirred tank slurry reactors in the reactor originally ( ) at the wax-producing normal steady state suddenly jumping to a high-temperature ( ) methane-producing steady state for some time and e®entually returning to the normal steady state. A diagnostic nonlinear analysis sh...

The widespread use of fossil fuels has caused high CO2 concentrations in the atmosphere, which have had a great impact on climate and environment. Methods for efficiently utilizing to produce value-added chemicals received increasing attention. Among products hydrogenation, olefins, an important petrochemical feedstock, are one essential target products. Therefore, hydrogenation olefins been ex...