摘要:
The present invention relates to a process of preparing of a phosphorus-containing phosphorus-alumina support by a sol-gel method and a cobalt/phosphorus-alumina catalyst where cobalt is supported onto the phosphorus-alumina support as an active ingredient. The phosphorus-alumina support is prepared by a sol-gel method and has wide specific surface area with bimodal pore size distribution and high cobalt dispersion, thereby enabling to increase heat and mass transfer, stabilize the structure by modifying the surface property of alumina and decrease the deactivation rate due to the reduced oxidation of cobalt component during the F-T reaction. When Fischer-Tropsch reaction (F-T) is conducted on the catalyst, the catalyst maintains a superior thermal stability, inhibits the deactivation due to water generation during the F-T reaction and also causes relatively high conversion of carbon monoxide and stable selectivity of liquid hydrocarbons.
摘要:
The present invention relates to a cobalt/zirconium-phosphorus/silica catalyst in which cobalt, as an active ingredient, is impregnated on a zirconium-phosphorus/silica support prepared by treating the surface of silica with zirconium and phosphorus, and a method of preparing the catalyst. The catalyst has excellent reactivity since it has excellent heat and mass transfer properties due to a large pore structure of silica and increased reducibility of cobalt; excellent dispersion of cobalt and other activation substances during Fischer-Tropsch (F-T) reaction; and reduced sintering of cobalt particles during the reaction, and thus high CO conversion and stable selectivity for liquid hydrocarbon can be obtained during the F-T reaction.
摘要:
The present invention relates to a cobalt/phosphorus-alumina catalyst in which cobalt is supported as an active component on a phosphorus-alumina support wherein phosphorus is supported on alumina surface. With a bimodal pore structure of pores of relatively different pore sizes, the catalyst provides superior heat- and matter-transfer performance and excellent catalytic reactivity. Especially, when Fischer-Tropsch (F-T) reaction is performed using the catalyst, deactivation by the water produced during the F-T reaction is inhibited and, at the same time, the dispersion and reducing property of cobalt and other active component are improved. Therefore, the cobalt/phosphorus-alumina catalyst for F-T reaction in accordance with the present invention provides good carbon monoxide conversion and stable selectivity for liquid hydrocarbons.
摘要:
The present invention relates to an alumina- silica support having a double-layered, bimodal pore structure with different pore sizes in which alumina is dispersed on silica surface, a catalyst using the support and a method for preparing liquid hydrocarbons in high yield by Fischer- Tropsch reaction of a syngas (CO/H2/CO2) in the presence of the catalyst.
摘要:
The present invention relates to a method for preparing liquid hydrocarbons via a slurry phase Fischer-Tropsch (F-T) synthesis. In particular, the present invention relates to a method for preparing liquid hydrocarbons from syngas via slurry phase F-T synthesis using a catalyst, which can prevent the decrease in catalyst activity and filter clogging due to catalyst aggregation, simultaneously with improving selectivity for C 5 or higher hydrocarbons by using C 7 -C 12 alcohols having a high boiling point as an additive for a slurry reaction solvent or recycling the same alcohol separated from by-products that are generated during the F-T reaction. Since t he method of the present invention is more carbon-effective and shows improved long-term stability of a reactor, it can be effectively used in the preparation of liquid hydrocarbons.
摘要:
The present invention relates to a method of direct synthesis of light hydrocarbons from natural gas and carbon dioxide capable of improving production yield of light hydrocarbons and carbon utilization efficiency through a series of process of preparing synthesis gas with a predetermined molar ratio of carbon monoxide and hydrogen by a combined steam reforming of natural gas and carbon dioxide reforming of methane, performing Fischer-Tropsch reaction of the prepared synthesis gas in the presence of a specific catalyst, and recycling the byproducts of methane and carbon dioxide as the source material of the combined reforming.