Recent advances in the investigation of nanoeffects of Fischer-Tropsch catalysts

Morphology Evolution of Hcp Cobalt Nanoparticles Induced by Ru Promoter

“…Obviously, the surface morphologies and exposed facets of hcp Co nanoparticles undergo dynamic changes in response to Ru adsorption, and higher Ru content helps to promote the exposure of the high Miller index facets. The higher activity of hcp Co than fcc Co stems from the more favorable active facets with significantly higher reaction rates than the most active fcc Co(100) facet . Among all the exposed facets, the hcp Co(11‐21) facet has the highest reaction rate for CO dissociation, followed by (10‐11), (10‐12), (11‐20), and (10‐10) .…”

“…The higher activity of hcp Co than fcc Co stems from the more favorable active facets with significantly higher reaction rates than the most active fcc Co(100) facet. [55] Among all the exposed facets, the hcp Co (11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21) facet has the highest reaction rate for CO dissociation, followed by (10-11), (10)(11)(12), (11)(12)(13)(14)(15)(16)(17)(18)(19)(20), and (10-10). [17] Moreover, the calculated potential energy for CO activation of Co (11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21) facet is also the lowest.…”

Tuning the Facet Proportion of Co2C Nanoprisms for Fischer‐Tropsch Synthesis to Olefins

“…The goal in the traditional FTS reaction using Fe, Co and Ru based catalysts is to develop a suitable catalyst with high activity and high selectivity toward C 5+ hydrocarbons . It is generally believed that Fischer‐Tropsch synthesis is a surface catalyzed structure‐sensitive reaction, and the catalytic performance is strongly influenced by the morphology and exposed facets of the active phase . For Fe‐based catalysts, iron carbide (FeC x ) is easily formed under FT reaction conditions, and different exposed facets of FeC x possess different energy barriers for CO or H 2 activation.…”

“…[2] It is generally believed that Fischer-Tropsch synthesis is a surface catalyzed structure-sensitive reaction, and the catalytic performance is strongly influenced by the morphology and exposed facets of the active phase. [3] For Febased catalysts, iron carbide (FeC x ) is easily formed under FT reaction conditions, and different exposed facets of FeC x possess different energy barriers for CO or H 2 activation. It was found that direct CO dissociation was the preferred pathway for CO activation on the terrace-like χ-Fe 5 C 2 (510) facet, while Hassisted CO dissociation was the preferred one on the step-like χ-Fe 5 C 2 (010) and (001) surfaces.…”

Direct production of olefins via syngas conversion over Co2C-based catalyst in slurry bed reactor

“…Olens including lower olens (C 2-4 ¼ ) and longer-chain olens (C 5+ ¼ ), are extensively used to synthesize a wide range of products such as polymers, solvents, drugs, cosmetics and detergents. [1][2][3][4][5] Traditionally, they are produced by thermal or catalytic cracking of a broad range of petroleum products, such as naphtha, gas oil, condensates and light alkanes. Due to the depletion of the limited petroleum reserves, it is necessary to develop new processes for the production of olens from alternative feedstocks.…”