| 摘要 |
<p>Process to prepare a mixture of hydrogen and carbon monoxide from a gaseous mixture of hydrocarbons comprising methane, ethane and optional higher carbon number hydrocarbons by performing the following steps: (a) pre-reforming the hydrocarbon / steam mixture in the presence of a suitable reforming catalyst to convert ethane, and the optional higher carbon number hydrocarbons to methane, carbon dioxide and hydrogen, (b) heating the gaseous mixture obtained in step (a) to a temperature greater than 600 °C, (c) performing a partial oxidation by contacting the heated mixture of step (b) with a source of oxygen in a reactor burner yielding a reactor effluent having a temperature of between 1100 and 1500 °C, and (d) reducing the temperature of the reactor effluent by indirect heat exchange against evaporating water to a temperature between 750 and 900 °C, and wherein the heating in step (b) is effected by indirect heat exchange between the effluent of step (d) and the pre-reformed gaseous mixture obtained in step (a) using a printed circuit heat exchanger by feeding the effluent of step (d) through a first set of numerous microchannels as present in the printed circuit heat exchanger and feeding the pre-reformed gaseous mixture through a second set of numerous microchannels as present in the printed circuit heat exchanger, wherein the first and second set of microchannels are oriented such that convective heat exchange takes place between said first and second set of microchannels.</p> |
