L'air Liquide, Soci&#xe9;t&#xe9; Anonyme Pour L'etude Et L'exploitation Des Proc&#xe9;d&#xe9;s Georges Claude

Lurgi Gmbh

Air Liquide Global E&c Solutions Germany Gmbh

Theis Ohlhaver

Frank Castillo-Welter

Veronika Gronemann

Martin Rothaemel

Stephane Haag

Hermann Bach

Harald Koempel

Thomas Renner

Roberta Olindo

Harald Kömpel

Martin Gorny

Jorg Ott

Paul Manfred Krimlowski

Peter Trabold

Holger Dropsch

Stéphane Haag

Andreas Ochs

Paul Krimlowski

Martin ROTHÄMEL

Jörg Ott

There is proposed a method for starting up a pre-reforming stage in an integrated reforming plant in which a hydrocarbonaceous feed stream, in particular natural gas, is converted into a reformation product containing carbon oxides, hydrogen and hydrocarbons. Before carrying out the start-up method, the catalyst contained in the pre-reforming stage is in an oxidized or passivated state. For its activation, the pre-reforming catalyst is charged with a methanol/steam mixture, from which by steam reformation of methanol in situ the hydrogen required for the activation of the catalyst is produced. Excess hydrogen is used for the hydrogen supply of the desulfurization stage arranged upstream of the pre-reforming stage.

Method for starting up a pre-reforming stage

A process for producing short-chain olefins by conversion of oxygenates in a multi-stage fixed-bed reactor, in which the individual stages for reaction zones are covered with beds of a granular, form-selective zeolite catalyst and the feed mixture containing oxygenates is added distributed over the reaction stages. An increase of the availability of the fixed-bed reactor for the olefin production with the same or an increased yield of short-chain olefins is achieved in that one or more reaction zones are charged with a distinctly reduced mass flow of the feed mixture containing oxygenates, wherein the reduced mass flow fraction is distributed over other reaction zones.

Process for producing short-chain olefins with prolonged cycle time

For producing synthetic fuels, an educt mixture containing steam and oxygenates, such as methanol and/or dimethyl ether, is converted to olefins on a catalyst in a first process stage, and this olefin mixture then is divided in a separating means into a stream rich in C-Chydrocarbons and a stream rich in Chydrocarbons. The stream rich in Chydrocarbons is divided into a stream rich in Cand Chydrocarbons and a stream rich in Chydrocarbons, wherein the stream rich in Cand Chydrocarbons is at least partly subjected to an etherification with methanol. The ethers thus obtained are admixed to the gasoline product stream.

Method and apparatus for producing synthetic fuels

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Frankfurt am Main, Germany

Theis Ohlhaver