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Process for a reduction in the amount of sulphur compounds, hydrogen cyanide and formic acid in synthesis gas

A synthesis gas and compound technology, applied in the field of producing other compounds such as methanol, dimethyl ether or hydrocarbon gas, can solve the problem of harmful execution

Inactive Publication Date: 2010-12-15
HALDOR TOPSOE AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Furthermore, the presence of sulfur-containing compounds in the feed to the process would be detrimental to the performance of the process itself, since sulfur is poisonous to the catalysts used in the process

Method used

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  • Process for a reduction in the amount of sulphur compounds, hydrogen cyanide and formic acid in synthesis gas
  • Process for a reduction in the amount of sulphur compounds, hydrogen cyanide and formic acid in synthesis gas
  • Process for a reduction in the amount of sulphur compounds, hydrogen cyanide and formic acid in synthesis gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] Make containing 10 volume ppm H 2 A gas of S and 20% by volume steam is contacted with zinc oxide at 200°C. The concentration of S-compounds obtained in the synthesis gas in the dry gas was 3.2 ppb by volume.

Embodiment 2

[0087] Make containing 10 volume ppm H 2 A gas of S and 50% steam by volume is contacted with zinc oxide at 200°C. The concentration of S-compounds obtained in the syngas in the dry gas was 10 ppb by volume.

[0088] Operation of Embodiment 3-12

[0089] Experiments with different catalysts were carried out using synthesis gas mainly composed of hydrogen, carbon monoxide, carbon dioxide, the composition of which corresponds to that of the synthesis gas from the autothermal reforming unit.

[0090] The impurity was prepared as follows: Hydrogen cyanide was prepared by acid distillation of sodium cyanide. The formic acid used was analytical grade 32% formic acid solution. The ammonia used was 25% ammonia solution (analytical grade).

[0091] The impurities hydrogen cyanide, ammonia and formic acid were then added to the feed water to the test unit evaporator. The amount of impurities in the synthesis gas corresponds to the amount expected in the synthesis gas from the autot...

Embodiment 3

[0110] 7% by weight silver on titania was prepared by impregnating porous 3 mm titania particles with an aqueous solution containing 22.1 g of silver nitrate per 100 ml of solution. The impregnated titanium oxide was dried at 110°C, followed by silver nitrate decomposition at 500°C for 1 hour. Catalysts were tested at low and high space velocities. The results are shown in Table 2.

[0111] Table 2

[0112]

[0113] As shown in Table 2, silver added to TiO 2 Reduce the concentration of formic acid and derivatives by more than 60%.

[0114] There are some water gas shift reactions that take place over the catalyst.

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Abstract

A process for a reduction in the amount of sulphur compounds, hydrogen cyanide, formic acid and formic acid derivatives in synthesis gas comprising these compounds, the process comprising contacting the synthesis gas with a sulphur absorbent comprising material and thereafter with a catalyst comprising one or more metals selected from the group consisting of silver, gold, copper, palladium, platinum and their mixtures and supported on a carrier comprising at least one of the oxides of scandium, yttrium, lanthanum, cerium, titanium, zirconium, aluminium, zinc, chromium and molybdenum.

Description

[0001] The present invention relates to reducing the amount of sulfur-containing compounds, hydrogen cyanide and formic acid and its derivatives present in synthesis gas to produce a gas suitable for the production of other compounds such as methanol, dimethyl ether or hydrocarbons. In particular, the present invention relates to the reduction of these impurities via the absorption of sulfur-containing compounds followed by catalytic treatment of the synthesis gas. Background of the invention [0002] Syngas such as methanol, dimethyl ether (DME) or liquid hydrocarbons are produced via, for example, the Fischer-Tropsch synthesis, from carbonaceous feedstocks such as natural gas, LPG, liquid hydrocarbons including heavy hydrocarbons, or solid feedstocks such as coal. The carbonaceous feedstock is reacted with steam and / or air, enriched air, or oxygen at high temperature during steam reforming, autothermal reforming, catalytic partial oxidation, or combinations thereof. [0003]...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86C01B3/58
CPCB01D2253/112C01B2203/0475B01D2253/104C01B2203/0485C01B2203/0425C01B3/58B01D2255/1021C01B2203/048C01B2203/0435B01D53/8603C01B3/56C01B2203/0465B01D53/04B01D2255/1023B01D2257/30B01D2255/106B01D2255/104
Inventor K·阿斯伯格-彼得森I·迪布克耶尔P·E·H·尼尔森
Owner HALDOR TOPSOE AS
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