摘要:
Disclosed herein is a novel F-T catalyst system suitable for the selective production of light olefins from syngas produced from natural gas (syngas to olefins; STO), which contains an iron-based catalyst and a calcium oxide (CaOx) prepared by a sol-gel process and shows an increased yield of C 2 -C 4 light olefins and improved catalyst stability.
摘要:
The present invention relates to a process for producing light olefins from a synthesis gas with significantly improved conversion and selectivity for C2-C4 light olefins in general and propylene in particular, as compared to a conventional process, through a sequential two-step process comprising preparing olefin compounds from a synthesis gas in the presence of an iron catalyst by the Fischer- Tropsch reaction followed by cracking the olefin compounds in the presence of a zeolite catalyst.
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.
摘要:
The present invention relates to a cobalt/zirconia-alumina catalyst, in which cobalt is supported as an active ingredient on zirconia-alumina prepared by co-precipitation, having a bimodal pore structure with different pore sizes and maintaining a specific pore volume ratio and a method for preparing liquid hydrocarbons with high yield from the Fischer- Tropsch of a syngas (CO/H2/CO2 ) in the presence of the cobalt/zirconia-alumina 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 continuous separation and discharge apparatus and method of solid catalysts and liquid products for Fischer-Tropsch synthesis reactions, and more particularly, to a continuous separation and discharge apparatus and method of solid catalysts and products for Fischer-Tropsch synthesis reactions involving the conversion of synthetic gas into synthetic oil, by which products of the Fischer-Tropsch synthesis including wax, as a long-chain hydrocarbon, can be stably obtained by continuously separating the products from a slurry comprising solid catalyst particles and the products using periodic pulses of a feeding gas and discharging the products through a lower portion of a reactor. Provided is a continuous separation and discharge apparatus of solid catalysts and products for Fischer-Tropsch synthesis reactions including: a level sensing device which is installed at an upper portion of a reactor and detects the slurry-level of reactants; a solid catalyst/ product separation device and a discharge device which are installed at a lower portion of the reactor and separate and discharge liquid products from a mixed slurry in the reactor; and a control unit which receives a signal from the level sensing device to open and close the discharge device, wherein the separation device filters the solid catalysts, and the discharge device continuously discharges the products separated from the solid catalysts through the lower portion of the reactor by the amount of the synthesized products measured by a level sensing device.
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.