| 摘要 |
Synthesis gas is prepared by adiabatic reforming of the reaction mixture of hydrocarbon and steam and/or carbon dioxide by contact with a solid reforming catalyst, and feeding the reaction mixture to a fired tubular reformer. The adiabatic reforming step is conducted in a piping system having adiabatic zones (22, 24, 26) outside a heating section, and containing solid reforming catalyst comprising catalyzed structured elements. Preparation of synthesis gas by catalytic stream and/or carbon dioxide reforming of hydrocarbon feedstock (1), involves heating the reaction mixture of hydrocarbon and steam (2) and/or carbon dioxide (3) in a flue gas containing waste heat section (27) from fired tubular reformer (29), adiabatic reforming of the reaction mixture outside the waste heat section by contact with a solid reforming catalyst, repeating the first and second steps until the desired reaction mixture composition and temperature is reached, and feeding the reaction mixture to the fired tubular reformer and further reforming the mixture to the desired composition and temperature. The adiabatic reforming of the reaction mixture is conducted in the process gas piping system in the flue gas-containing waste heat section. The piping system has adiabatic zones outside the heating section and containing solid reforming catalyst comprising catalyzed structured elements. An independent claim is also included for an apparatus for the preparation of synthesis gas comprising an adiabatic pre-reformer (20) for optional pre-reforming of a mixture of hydrocarbon and steam and/or carbon dioxide, a fired tubular reformer with a flue gas-containing waste heat section, a process gas heating coil (21, 23, 25) integrated in the flue gas-containing waste heat section, and a steam reforming unit outside the waste heat section. |
