Abstract:
The invention is directed to a process for the preparation of a syngas comprising hydrogen and carbon monoxide from a methane comprising gas, which process comprises the steps of: (a) reacting the methane comprising gas with an oxidising gas to obtain a hot raw syngas comprising carbon monoxide and hydrogen; (b) adding carbon dioxide to the hot raw syngas under such conditions that at least part of the carbon dioxide added reacts with hydrogen present in the hot raw syngas; and (c) cooling the gas mixture resulting from step (b) to obtain the syngas. The invention also relates to a process for the preparation of hydrocarbon products in which a feed syngas is prepared in the process as described above and is subsequently converted into hydrocarbon products in a Fischer-Tropsch process.
Abstract:
Process for the preparation of a syngas comprising hydrogen and carbon monoxide from a methane comprising gas, which process comprises the steps of: (a) reacting the methane comprising gas with an oxidising gas at an operating temperature in the range of 1150 to 1370 °C by means of non-catalytic partial oxidation resulting in a hot raw syngas mixture comprising carbon monoxide and hydrogen and having a methane content higher than the methane content in a state of thermodynamic equilibrium at the operating temperature applied; (b) passing the hot raw syngas mixture resulting from step (a) through a bed of methane oxidation catalyst for oxidising methane with steam formed in the non-catalytic POX into carbon monoxide and hydrogen, which methane oxidation catalyst comprises at least one catalytically active metal supported on a refractory oxide support material where soot particles present in the hot raw syngas mixture resulting from step (a) are retained; (c) converting the soot particles retained in the refractory oxide support material to carbon monoxide; and (d) recovering soot-depleted syngas in a state of thermodynamic equilibrium.
Abstract:
The invention relates to a process for the preparation of a syngas comprising hydrogen and carbon monoxide comprising the steps of: (a) reacting a preheated methane comprising gas with an oxidising gas to obtain a hot raw syngas comprising carbon monoxide and hydrogen; (b) cooling the hot raw syngas resulting from step (a) to obtain the syngas by indirect heat exchange against water to produce saturated steam; (c) further cooling the raw syngas obtained in step (b) by indirect heat exchange against a methane comprising gas to obtain a cooled raw syngas and the preheated methane comprising gas for use in step (a), wherein: (i) steps (b) and (c) take place in a single cooling device for combined indirect heat exchange against water and against the methane comprising gas; and (ii) the preheated methane comprising gas obtained in step (c) has a temperature between 400 and 650°C. The invention also relates to a cooling device which can be used as the single cooling device in the above process. The cooling device comprises an evaporation section for producing saturated steam, a gas heat exchange section for preheating the methane comprising feed used in step (a) against the raw syngas and a dry steam collection space. This dry steam collection space is separated from the evaporation section where wet saturated steam is formed.
Abstract:
The invention is directed to a process for the preparation of a syngas comprising hydrogen and carbon monoxide from a methane comprising gas, which process comprises the steps of: (a) reacting the methane comprising gas with an oxidising gas in an autothermal reformer to obtain a hot raw syngas comprising carbon monoxide and hydrogen; (b) cooling the hot raw syngas resulting from step (a) to obtain the syngas, wherein step (b) comprises cooling the hot raw syngas by indirect heat exchange against the methane comprising gas used in step (a) and wherein sulphur is added upstream of cooling step (b). The invention also relates to a process for the preparation of hydrocarbon products in which a feed syngas is prepared in the process as described above followed by a desulphurisation treatment and the desulphurised syngas is subsequently converted into hydrocarbon products in a Fischer-Tropsch process.
Abstract:
The invention is directed to a process for the preparation of a syngas comprising hydrogen and carbon monoxide from a methane comprising gas, wherein a preheated, desulphurised methane comprising gas is subjected to prereforming in a prereformer and oxidation in an autothermal reformer, after which the resulting hot raw syngas is cooled. In this process: (i) the methane comprising gas is preheated to a temperature not exceeding 400°C; (ii) preheating and cooling are combined in that cooling of the hot raw syngas comprises indirect heat exchange against the methane comprising gas that is preheated, and (iii) steam is added to the preheated, desulphurised methane comprising gas before it enters the prereformer in such amount that the steam to carbon (as hydrocarbon) molar ratio of this preheated, desulphurised methane comprising gas is in the range of from 0.3 to 1.5 when it enters the prereformer. The invention also relates to a process for the preparation of hydrocarbon products in which a feed syngas is prepared in the process as described above followed by a a Fischer-Tropsch synthesis process.
Abstract:
The present invention relates to a saturator. The present invention further relates to a method for reusing a waste water stream from a Fischer-Tropsch reactor. The invention further relates to system for recycling waste water from a Fischer-Tropsch reactor preferably within a gas-to-liquids (GTL) plant.