Exxonmobil Research and Engineering Company

Ronald Suryo

Jihad Mohammed Dakka

Michel A Daage

Chuansheng Bai

Jonathan Miller

Preeti Kamakoti

Anastasios I Skoulidas

Arun K Sharma

Anita S Lee

Clay R Sutton

Timothy M Healy

Alvin U Chen

David Lee Vannauker

John T Wyatt, Jr

J Timothy Cullinane

Len Lampert

E Nicholas Jones

John Theodore Wyatt

Integrated methods and systems are disclosed for the production of dimethyl ether. The method may include reforming natural gas to syngas in a first reactor; contacting the syngas produced in the first reactor with a catalyst system in a second reactor to produce dimethyl ether and carbon dioxide; and supplying steam as a cofeed to at least one of the first reactor and the second reactor in an amount sufficient to achieve a Mvalue of 1.4 to 1.8 or to improve the hydrocarbon or oxygenate selectivity.

Systems and methods for producing dimethyl ether from natural gas

Structures and methods are provided for improving the distribution of fluids between exit flows from a split junction, such as a tee-junction. The improved distribution of fluids can result in a more equal distribution of both gases and liquids between the exits of the junction. The improvement can be provided by using a baffle structure, such as an annular baffle structure, upstream from the desired junction. The baffle structures can improve the distribution of fluids in the exit flows in various manners, such as by reducing the amount of vorticity or 'swirl' in the input flow to the junction or by reducing the separation of gases from liquids within a flow.

Piping internals to control gas-liquid flow split

A circulating fluid bed reactor such as that used in fluid coking processes has a circular dense bed reaction section above the reactor base where the fluidizing gas is injected and a plurality of frusto-conical baffles in the dense bed reaction section, each of which depends downwardly and radially inwards from the reactor wall to a lower, inner edge defining a central aperture. The baffles are preferably provided with downcomers which permit downward flow of solids and upward flow of gas through the baffles.

Circulating fluid bed reactor with improved circulation

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Fairfax Station, VA, United States of America

Ronald Suryo