Abstract: A method for removing a first and a second minor component from a gas mixture comprising the first and second minor components and one or more major components. The method comprises providing a first adsorbent zone containing a first adsorbent material and a second adsorbent zone containing a second adsorbent material wherein the selectivity of the first adsorbent material for the first minor component relative to the second minor component is greater than the selectivity of the second adsorbent material for the first minor component relative to the second minor component. The average particle diameter of the first adsorbent material and the average particle diameter of the second adsorbent material preferably are substantially the same. The gas mixture is passed through the first adsorbent zone and subsequently through the second adsorbent zone. A purified gas containing the one or more major components and depleted in the first and second minor component is withdrawn from the second adsorbent zone.

Abstract: The present invention relates to a process and apparatus for the removal of nitrous oxide from a feed gas stream using an adsorbent having a nitrogen diffusion parameter of 0.12 sec−1 or higher and a nitrous oxide capacity of 79 mmol/g/atm or higher at 30° C.

Abstract: A process for removing at least water and carbon dioxide from a feed gas stream of air, synthesis gas or natural gas is described, comprising the steps of: contacting the feed gas stream with a composite adsorbent comprising silica and metal oxide, wherein the composite adsorbent contains at least 50 wt % silica, to form a first purified gas stream, and regenerating the composite adsorbent at a temperature of 0 to 200° C. The process optionally further comprises contacting the first purified gas stream with a carbon dioxide adsorbent and/or a nitrous oxide or hydrocarbon adsorbent.

Abstract: A process for removing at least water and carbon dioxide from a feed gas stream of air, synthesis gas or natural gas is described, comprising the steps of:

Abstract: A method for removing a first and a second minor component from a gas mixture comprising the first and second minor components and one or more major components. The method comprises providing a first adsorbent zone containing a first adsorbent material and a second adsorbent zone containing a second adsorbent material wherein the selectivity of the first adsorbent material for the first minor component relative to the second minor component is greater than the selectivity of the second adsorbent material for the first minor component relative to the second minor component. The average particle diameter of the first adsorbent material and the average particle diameter of the second adsorbent material preferably are substantially the same. The gas mixture is passed through the first adsorbent zone and subsequently through the second adsorbent zone. A purified gas containing the one or more major components and depleted in the first and second minor component is withdrawn from the second adsorbent zone.

Abstract: The present invention relates to a process and apparatus for the removal of nitrous oxide from a feed gas stream using an adsorbent having a nitrogen diffusion parameter of 0.12 sec−1 or higher and a nitrous oxide capacity of 79 mmol/g/atm or higher at 30° C.

Abstract: A binderless X-type zeolite is used in a process for the reduction of the level of carbon dioxide and/or N2O in a gaseous mixture, the zeolite being obtained by converting the binder in a bound zeolite to zeolite such that the ratio of the adsorption capacity for carbon dioxide of the binderless zeolite to the adsorption capacity of the bound zeolite is greater than the weight ratio of the level of zeolite in the binderless zeolite to the level in the bound zeolite.

Abstract: A binderless X-type zeolite is used in a process for the reduction of the level of carbon dioxide and/or N2O in a gaseous mixture, the zeolite being obtained by converting the binder in a bound zeolite to zeolite such that the ratio of the adsorption capacity for carbon dioxide of the binderless zeolite to the adsorption capacity of the bound zeolite is greater than the weight ratio of the level of zeolite in the binderless zeolite to the level of zeolite in the bound zeolite.