Abstract:
The invention relates to a process for the parallel preparation of hydrogen, carbon monoxide and a carbon-comprising product, wherein one or more hydrocarbons are thermally decomposed and at least part of the pyrolysis gas formed is taken off from the reaction zone of the decomposition reactor at a temperature of from 800 to 1400°C and reacted with carbon dioxide to form a gas mixture comprising carbon monoxide and hydrogen (synthesis gas).
Abstract:
A catalyst for the reforming of hydrocarbon-comprising compounds with CO2, water and/or hydrogen, a process for producing the same, and a process using the same for the reforming of the hydrocarbon-comprising compounds are provided. The production of the catalyst is based on contacting, intimately mixing and thermal treating of a hydrotalcite-comprising starting material with a fusible metal salt, which more preferably comprises nickel nitrate hexahydrate, to result in the metal salt melt. After molding and shaping, the compounds are subjected to high-temperature calcination step. In addition, the process using the catalyst for the reforming of the hydrocarbon-comprising compounds is carried out in a temperature range from 500 to 1100 °C at a pressure in the range from 2 to 70 bar. The catalyst is distinguished from the prior art by physicochemical properties.
Abstract:
The invention relates to a method for producing aluminates of general formula (I): A1BxAl12-xO19-y, wherein A means at least one element from the group consisting of Sr, Ba, and La, B means at least one element from the group consisting of Mn, Fe Co, Ni, Rh, Cu, and Zn, x means 0.05 to 1.0, and y means a value that is determined by the oxidation states of the other elements, comprising the following steps: (i) providing one or more solutions or suspensions containing precursor compounds of elements A and B and a precursor compound of aluminum in a solvent, (ii) converting the solutions or suspensions or the suspensions into an aerosol, (iii) introducing the aerosol into a directly or indirectly heated pyrolysis zone, (iv) performing the pyrolysis, and (v) separating the formed particles containing hexaaluminate of general formula (I) from the pyrolysis gas.
Abstract:
The invention relates to a process for the parallel preparation of hydrogen, carbon monoxide and a carbon-comprising product, wherein one or more hydrocarbons are thermally decomposed and at least part of the pyrolysis gas formed is taken off from the reaction zone of the decomposition reactor at a temperature of from 800 to 1400°C and reacted with carbon dioxide to form a gas mixture comprising carbon monoxide and hydrogen (synthesis gas).
Abstract:
The invention relates to a process for the parallel preparation of hydrogen, carbon monoxide and a carbon-comprising product, wherein one or more hydrocarbons are thermally decomposed and at least part of the pyrolysis gas formed is taken off from the reaction zone of the decomposition reactor at a temperature of from 800 to 1400°C and reacted with carbon dioxide to form a gas mixture comprising carbon monoxide and hydrogen (synthesis gas).
Abstract:
The present invention relates to a hexaaluminate-containing catalyst, which comprises a hexaaluminate-containing phase that includes cobalt and at least one additional element from the group La, Ba, Sr. The Co content of the hexaaluminate-containing catalyst is in the range of 2-15 mol%, preferably 3-10 mol% and further preferably in the range of 4-8 mol%, the content of the at least one additional element from the group La, Ba, Sr is in the range of 2-25 mol%, preferably 3-15 mol%, further preferably 4-10 mol% and the content of Al is in the range of 70-90 mol%. In addition to the hexaaluminate-containing phase, the catalyst can include a 0-50 wt% oxide secondary phase, the portion of oxide secondary phase preferably in the range of 3-40 wt% and further preferably in the range of 5-30 wt%. The method according to the invention for producing the catalyst is based on initially bringing a source of aluminium oxide, preferably, a boehmite, into contact with cobalt species and at least one element from the group La, Ba, Sr. The moulded and dried material is preferably calcined at a temperature greater than or equal to 800°C. The reforming method for converting hydrocarbons, preferably methane, in the presence of CO2 is characterised in that the catalyst is used at a process temperature greater than 700°C, preferably greater than 800°C and further preferably greater than 900°C, the process pressure being greater than 5 bar, preferably greater than 10 bar and further preferably greater than 15 bar.