摘要:
Provided are the preparation of a metal lattice-doping catalyst in an amorphous molten state, and the process of catalyzing methane to prepare olefins, aromatics, and hydrogen using the catalyst under oxygen-free, continuous flowing conditions. Such a process has little coke deposition and realizes atom-economic conversion. Under the conditions encountered in a fixed bed reactor (i.e. reaction temperature: 750-1200 °C; reaction pressure: atmospheric pressure; the weight hourly space velocity of feed gas: 1000-30000 ml/g/h; and fixed bed), the conversion of methane is 8-50%. The selectivity of olefins is 30-90%. And the selectivity of aromatics is 10-70%.
摘要:
The inventive concepts disclosed and/or claimed herein relate generally to catalysts and, more particularly, but not by way of limitation, to a heterogeneous, metal-free hydrogenation catalyst containing frustrated Lewis pairs. In one non-limiting embodiment, the heterogeneous, metal-free catalyst comprises hexagonal boron nitride (h-BN) having frustrated Lewis pairs therein.
摘要:
Catalysts comprising the mixed oxides of ruthenium, copper, at least one alkali metal and at least one of rhodium, iridium, palladium, and platinum are disclosed which are useful in the upgrading of synthesis gas, particularly for obtaining alkanes and alcohols.
摘要:
Aprocess is disclosed for producing alkylbenzenes by the alkylation of aromatic hydrocarbons with olefins. High reactivity and selectivity are provided by the use of a catalyst comprising sodium and/or sodium amide deposited on a carrier represented by the formula K 2 O. x Al 2 O 3 where x is 0.5 ≤x≤11.
摘要:
Aprocess is disclosed for producing alkylbenzenes by the alkylation of aromatic hydrocarbons with olefins. High reactivity and selectivity are provided by the use of a catalyst comprising sodium and/or sodium amide deposited on a carrier represented by the formula K 2 O. x Al 2 O 3 where x is 0.5 ≤x≤11.
摘要:
A process of upgrading synthesis gas to hydrocarbons and oxygenated hydrocarbons, particularly olefins and carboxylic acids, comprises contacting synthesis gas with catalysts comprising the mixed oxides of ruthenium, copper, an alkali or alkaline earth metal, and optionally a metal selected from Ce, Cr, Fe, Mn, Mo, Th, Zn or mixtures thereof. The synthesis gas upgrading product may be contacted with a hydrogenation catalyst to provide alkanes, alcohols and esters, useful for fuels. Catalysts comprising the mixed oxides of ruthenium, copper, at least one alkali metal and at least one of rhodium, iridium, palladium, and platinum are further disclosed which are useful in the upgrading of synthesis gas, particularly for obtaining alkanes and alcohols.
摘要:
The present invention provides a heteroatom-containing nano-carbon material, a preparation process and use thereof, based on the total weight of said heteroatom-containing nano-carbon material and calculated as the elements, the oxygen content is 1-6wt%, the nitrogen content is 0-2wt%, the carbon content is 92-99wt%; in the XPS, the ratio of the oxygen content as determined with the peak(s) in the range of 531.0-532.5eV to the oxygen content as determined with the peak(s) in the range of 532.6-533.5eV is 0.2-0.8; the ratio of the carbon content as determined with the peak(s) in the range of 288.6-288.8eV to the carbon content as determined with the peak(s) in the range of 286.0-286.2eV is 0.2-1; the ratio of the nitrogen content as determined with the peak(s) in the range of 398.5-400.1eV to the total nitrogen content is 0.7-1. Said heteroatom-containing nano-carbon material shows a good catalytic capability in dehydrogenation of hydrocarbons, and can notably increase the conversion of the starting material and the selectivity for the target product
摘要:
The inventive concepts disclosed and/or claimed herein relate generally to catalysts and, more particularly, but not by way of limitation, to a heterogeneous, metal-free hydrogenation catalyst containing frustrated Lewis pairs. In one non-limiting embodiment, the heterogeneous, metal-free catalyst comprises hexagonal boron nitride (h-BN) having frustrated Lewis pairs therein.