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Process for the removal of contaminants

A logistics, iron oxide technology, applied in the field of pollutant removal, can solve problems such as reducing catalyst efficiency

Inactive Publication Date: 2008-05-07
SHELL INT RES MAATSCHAPPIJ BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is generally desirable to remove these impurities before using the synthesis gas in a Fischer-Tropsch reactor vessel, since at least hydrogen sulfide and COS generally reduce the efficiency of catalysts typically used in Fischer-Tropsch processes by poisoning the catalyst

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0020] Examples of the invention are now limited by way of example only.

[0021] Fischer-Tropsch synthesis is well known to those skilled in the art and involves the synthesis of hydrocarbons from a gaseous mixture of hydrogen and carbon monoxide by contacting this mixture with a Fischer-Tropsch synthesis catalyst under reaction conditions.

[0022] Fischer-Tropsch catalysts are known in the art and generally comprise a Group VIII metal component, preferably cobalt, iron and / or ruthenium, more preferably cobalt. Typically the porous catalyst element and each porous catalyst element comprises a support material such as a porous inorganic refractory oxide, preferably alumina, silica, titania, zirconia or mixtures thereof.

[0023] The catalytically active material may be present with one or more metal promoters or cocatalysts. Depending on the particular promoter involved, the promoter may be present as a metal or metal oxide. Suitable promoters include oxides of metals of Gr...

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PUM

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Abstract

A method of reducing carbonyl sulfide (COS) in a gas stream is described. The method includes contacting a gas stream with an iron oxide-based material. The present invention relates to a process for the removal of COS from any type of gas stream, especially a gas stream comprising one or more of ethane, methane, hydrogen, carbon dioxide, hydrogen cyanide, ammonia, hydrogen sulfide and inert gases. They include natural gas, and especially synthesis gas. Syngas can be used in the Fischer-Tropsch process. The present invention provides a simple and effective method of reducing COS, especially with materials that can be easily placed in existing shelter beds, thus avoiding any rebuilding time and costs. The iron oxide-based material can also be used for other impurities, providing a single bed solution.

Description

technical field [0001] The present invention relates to a process for the removal of hydrogen sulphide, hydrogen cyanide and carbonyl sulphide (COS) from synthesis gas streams, especially those used in Fischer-Tropsch reactions. Background technique [0002] The Fischer-Tropsch process can be used to convert hydrocarbonaceous feedstocks to liquid and / or solid hydrocarbons. Feedstocks such as natural gas, associated gas and / or coal bed methane, (residual) crude oil fractions, biomass or coal are converted in a first step to a mixture of hydrogen and carbon monoxide (this mixture is often called synthesis gas or synthesis gas). Then in a second step, the synthesis gas is converted over a suitable catalyst, especially an iron or cobalt catalyst, under conditions of high temperature and pressure into paraffinic compounds ranging from methane up to 200 carbon atoms or In special cases even more high molecular weight molecules. [0003] In the case of synthesis gas produced from...

Claims

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Application Information

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IPC IPC(8): B01D53/02B01D53/48B01D53/86C07C7/12C07C9/04C01B3/56
CPCB01D53/02C01B2203/0485C01B3/56C10K1/32B01D53/8606C01B2203/042B01D2257/308C01B2203/062B01D53/485
Inventor R·R·古曼R·H·M·赫罗尔德T·拉斯特B·J·M·曼尚德C·J·史密特
Owner SHELL INT RES MAATSCHAPPIJ BV
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