Haldor Topsoe A/s

Haldor Topse A/s

Rasmus Trane-Restrup

Niklas Bengt Jakobsson

Jacob Hjerrild Zeuthen

Kresten Egeblad

Christian Wix

Ib Dybkjær

Troels Dahlgaard Stummann

Hans Qiongxiao Wu

Tommy Bian Xiang

Souheil Saadi

Oxygen is removed from a gas feed such as a landfill gas, a digester gas or an industrial COoff-gas by heating the feed gas, optionally removing siloxanes and silanols from the heated feed gas, optionally removing part of the sulfur-containing compounds in the heated feed gas, injecting one or more reactants for oxygen conversion into the heated feed gas, carrying out a selective catalytic conversion of any or all of the volatile organic compounds (VOCs) present in the gas, including sulfur-containing compounds, chlorine-containing compounds and any of the reactants injected, in at least one suitable reactor, and cleaning the resulting oxygen-depleted gas. The reactants to be injected comprise one or more of H, CO, ammonia, urea, methanol, ethanol and dimethyl ether (DME).

Method for the removal of oxygen from an industrial gas feed

The present invention relates to a method and a system for catalytic oxidation of a lean HS stream. More specifically, the invention concerns a novel way of removing sulfur dioxide (SO) formed by catalytic oxidation of hydrogen sulfide (HS) with the purpose of removing HS from a gas. This catalytic oxidation of HS yields sulfur dioxide (SO) through the use of known catalysts, so-called SMC catalysts.

Method and system for catalytic oxidation of a lean HS stream

Oxygen is removed from a gas feed such as a landfill gas, a digester gas or an industrial COoff-gas by removing sulfur-containing compounds and siloxanes from the feed gas, heating the feed gas, injecting one or more reactants for oxygen conversion into the heated feed gas, carrying out a selective catalytic oxygen conversion in at least onesuitable reactor and cleaning the resulting oxygen-depleted gas. The reactants to be injected comprise one or more of H, CO, ammonia, urea, methanol, ethanol and dimethylether (DME).

Method for the removal of oxygen from an industrial gas

A method for the purification of a raw gas stream by selective catalytic oxidation, in which organic and inorganic sulfur compounds, halogenated and non-halogenated volatile organic compounds are selectively oxidized without substantially oxidizing the lower hydrocarbons and the sulfur containing compounds present in the gas to sulfur trioxide and excess of oxygen is removed by oxidation of lower alcohols, ethers or hydrogen added to the raw gas stream upstream the catalytic oxidation.

Process for the purifying of a raw gas stream containing mainly C1-C5 hydrocarbons and carbon dioxide, and impurities of organic and inorganic sulfur compounds, halogenated and non-halogenated volatile organic compounds and oxygen

The present disclosure relates to a process plant and a process for production of a hydrogen rich gas, comprising the steps of (a) directing an amount of a synthesis gas comprising at least 15%, 50% or 80% on dry basis of CO and Hin combination, a gas comprising steam, and a recycled intermediate product gas to be combined into a first reactor feed gas, (b) directing said first reactor feed gas to contact a first material catalytically active in water gas shift reaction, producing an intermediate product gas, (c) splitting said intermediate product gas in the recycled intermediate product gas and a remaining intermediate product gas, (d) combining said remaining intermediate product gas with a further amount of synthesis gas forming a second reactor feed gas, (e) directing said second reactor feed gas to contact a second material catalytically active in the water gas shift reaction, producing a product gas, characterized in the HO:CO ratio in said first reactor feed gas being from 0.5 to 2.0 and the HO:CO ratio in said second reactor feed gas being from 0.5 to 2.0. with the associated benefit of distributing the heat development and thus reducing the maximum temperature in the reactors by limiting the extent of reaction of the reacting mixture, and thereby reducing the amount of steam required for limiting methanation.

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Roskilde, Denmark

Rasmus Trane-Restrup