Shell Oil Comapny

Ewout Martijn Van Jarwaarde

Zaida Diaz

Cornelis Jacobus Smit

Gijsbert Jan Van Heeringen

Eric Johannes Puik

Arian Nijmeijer

Hendrik Jan Van Der Ploeg

Henricus Abraham Geers

The invention concerns a process for the removal of gaseous acidic contaminants, especially carbon dioxide and/or hydrogen sulphide, in two or more stages from a gaseous hydrocarbonaceous feedstream () comprising hydrocarbons and said acidic contaminants, using one or more membranes in each separation stages. The gaseous hydrocarbonaceous feedstream is especially a natural gas stream. The process is especially suitable for feedstreams comprising very high amounts of acidic contaminants, especially carbon dioxide, e.g. more than 25 vol. %, or even more than 45 vol. %. In a first stage () a pure or almost pure stream of acidic contaminants is separated from the feedstream, the acidic contaminants () stream suitably containing less than 5 vol % of hydrocarbons. The remaining stream () comprises the hydrocarbons and still a certain amount of gaseous acidic contaminants. In a second stage () a pure or almost pure stream of hydrocarbons () is separated from the remaining stream, where after the then remaining stream () is combined with the feed for the first stage (), the hydrocarbon stream suitably containing less than 5 vol % of acidic contaminants.

Multi-stage membrane separation process

A process to prepare elemental iron by contacting an iron ore feed with a reducing gas at a pressure of between 1 and 10 bar to obtain iron and an off-gas includes preparing the reducing gas by performing the following steps: (a) partially oxidizing a mixture comprising a solid or liquid carbonaceous fuel and oxygen at a pressure of between 10 and 80 bar, thereby obtaining a gas comprising Hand CO; (b) removing COand HS from the gas obtained in step (a) to obtain an intermediate gas comprising Hand CO; (c) supplying the intermediate gas obtained in step (b) to a H-selective membrane to obtain a H-rich permeate gas and a CO-rich retentate; and (d) heating H-rich permeate to obtain a heated H-rich permeate as the reducing gas.

Process for production of elemental iron

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Amsterdam, Netherlands

Ewout Martijn Van Jarwaarde