TH35579A - Gas conversion using hydrogen from syngas, and tail gas from hydrogen conversion. - Google Patents

Abstract

DC60 (23/03/42) One gas conversion process that includes catalytic hydrocarbon synthesis from syngas, which contains a mixture of H2 and CO, produces hydrogen from syngas, and upgrades the synthesized hydrocarbons by hydrogen conversion operation, which uses this hydrogen. Hydrogen conversion also produces a large amount of hydrogen-containing tail gas, which is used in the process for (i) revitalizing hydrocarbon synthesis catalysts, (ii) hydrocarbon synthesis, and (iii) hydrogen production. At least one of the models uses the tail gas to desulfurize - hydrogen from sulfur-containing liquid hydrocarbons separated from natural gas used to produce syngas. Hydrogen production is achieved by physical separation such as PSA, with or without chemical methods such as water gas equilibrium shift reactions. One gas conversion process that includes catalytic hydrocarbon synthesis from syngas that... It consists of a mixture of H2 and CO, producing hydrogen from synthesized gas and upgrading synthesized hydrocarbons through hydrogen conversion operations. This hydrogen is then used in processes for (i) revitalizing hydrocarbon synthesis catalysts, (ii) hydrocarbon synthesis, and (iii) hydrogen production. At least one of these methods uses the tail gas to hydrogenate the desulfurization of sulfur-containing liquid hydrocarbons extracted from natural gas used to produce synthesized gas. Hydrogen production is achieved through physical separation, such as PSA, with or without chemical methods such as water-gas equilibrium shift reactions.

Claims (11)

1. Gas conversion processes that include hydrocarbon synthesis, hydrogen conversion of synthesized hydrocarbons, and hydrogen production from synthesized hydrocarbons containing a mixture of H2 and CO, which involves the exposure of such synthesized gas to a hydrocarbon synthesis catalyst and the reaction of such H2 and CO with the catalyst present at reaction conditions that result in the formation of hydrocarbons. At least part of these hydrocarbons are then upgraded by hydrogenation with the presence of a hydrogen conversion catalyst to alter the molecular structure of the hydrocarbons and to produce a large amount of hydrogen-rich tail gas. This hydrogen-rich tail gas is used for (I) the synthesis of the hydrocarbons, (ii) the production of the hydrogen, (iii) the reactivation of the hydrocarbon synthesis catalyst, and (iv) the desulfurization of at least one of the hydrogen-rich liquid hydrocarbons, and the production of the hydrogen used for the hydrogen conversion of the hydrocarbons from the synthesized gas. 2. The process under claim 1 that produces the said hydrogen from the said syngas by (I) a physical separation method and (ii) at least one chemical method. 3. The process under claim 2 for the production of such hydrogen from the aforementioned syngas using a method involving physical separation. 4. The process under claim 2, which describes the method for producing hydrogen, includes a change in the equilibrium point of water gas. 5. The procedure under claim 3 involves the synthesis of the aforementioned hydrocarbons through the reaction of a mixture of H2 and CO, in the presence of a Fischer-Tropsch hydrocarbon synthesis catalyst, under reaction conditions that yield at least a portion of it as a solid hydrocarbon at standard room temperature and pressure. 6. The process under claim 5, in which the hydrocarbon synthesis catalyst contains a cobalt-containing catalyst. 7. The process under claim 6 involves the synthesis of the aforementioned hydrocarbon catalyst occurring in a viscous liquid containing the said hydrocarbon catalyst, and the release of H2 and CO₂- through the viscous liquid containing the synthesized hydrocarbon, which is the liquid under the aforementioned reaction conditions. 8. The process under claim 5, in which the synthesis of such hydrocarbons has reversible activity reduction during the synthesis reaction and contains a large amount of hydrogen for the application of the catalyst. 9. The process under claim 5, which produces synthesized hydrocarbon gas, exhibits reversible degradation during the synthesis reaction and utilizes a large amount of hydrogen-containing tail gas to revitalize the catalyst. 10. The process stipulated in claim 7, which produces the aforementioned synthesis gas from natural gas from which sulfurous liquid hydrocarbons have been separated and which sulfur is removed from the liquid using hydrogen by reacting it with hydrogen in the presence of a hydrogenation catalyst. 11. The process under claim 10 involves the synthesis of such hydrocarbons with reversible reactivation during the reaction and the use of a large amount of hydrogen-containing tail gas to revive the catalyst. (Clause 11, page 2, figure 4)