Hitachi Zosen Corporation

Jx Nippon Oil Energy Corporation

Ken-ichi Sawamura

Suguru Fujita

Masanobu Aizawa

Masashi Okada

Yoshinobu Takaki

Takehiro Shimizu

Yoshihiro Asari

Kentaro Shinoya

Mai Tani

The carbon dioxide membrane separation system in a coal gasification process contains introduction of a mixed gas of hydrogen (H) and carbon dioxide (CO) in a high temperature and high pressure condition generated through water gas shift reaction from a water gas shift reaction furnace, while maintaining the temperature and pressure condition, to a zeolite membrane module containing a zeolite membrane for removing carbon dioxide, thereby removing carbon dioxide and generating a fuel gas rich in hydrogen. The fuel gas rich in hydrogen in a high temperature and high pressure condition discharged from the zeolite membrane module is fed to a gas turbine of the power generation facility while maintaining the temperature and pressure condition.

Carbon dioxide membrane separation system in coal gasification process, and integrated coal gasification combined cycle power generation facility using same

In a carbon dioxide recovery method including a carbon dioxide absorption step of bringing a gas to be treated containing carbon dioxide into contact with a carbon dioxide absorbing liquid, thereby removing carbon dioxide from the gas to be treated, and a regeneration step of removing carbon dioxide from a rich solution that has absorbed carbon dioxide in the carbon dioxide absorption step, thereby achieving regeneration, the rich solution that has absorbed carbon dioxide is guided in liquid form to a membrane separation apparatus () that is selectively permeable to carbon dioxide and equipped with a zeolite membrane for carbon dioxide separation, carbon dioxide is separated and removed by a pervaporation method, and the carbon dioxide absorbing liquid is thus regenerated.

Method for regenerating carbon dioxide absorbing liquid in carbon dioxide recovery method

The invention provides a process for separation and recovery of an olefin from a mixture of a paraffin and an olefin, contains a separation membrane containing a porous substrate and a zeolite layer that is formed on a surface and/or in a surface layer of the substrate, the zeolite layer being a hydrophilic zeolite layer that has an Si/Al ratio of 1.3 Si/Al 3.5 and a separation factor &#x3b1;, which is expressed by a value of a water/IPA weight ratio of a permeated component divided by that of a feed component in a pervaporation test at a temperature of from 40 to 75&#xb0; C. of a water-isopropanol mixture containing from 15 to 30% by weight of water, of 10 a 4,000.

Process for separation and recovery of olefin from mixture of paraffin and olefin

To provide a COmembrane separation and recovery system that is excellent in COpermeability and COseparation selectivity on recovery of COin a hydrogen production process and the like. The COmembrane separation and recovery system of the present invention comprises a dehydration treatment module () preliminary to a COmembrane separation module (), the COmembrane separation module () comprises a hydrophilic zeolite membrane () that exhibits COselective permeability and is formed on a porous substrate, and the hydrophilic zeolite membrane () is subjected to a dehydration treatment by a heat treatment at from 100 to 800&#xb0; C.

[object Object]

In the carbon dioxide separation system, a mixed gas having a carbon dioxide concentration of 3 to 75% is introduced into a primary carbon dioxide separation device equipped with a zeolite membrane for carbon dioxide separation to produce a primary permeated gas having a carbon dioxide concentration of 80% or more on the permeate side of the zeolite membrane and also reduce the carbon dioxide concentration of a primary gas on the non-permeate side of the zeolite membrane to 3 to 15%. Next, the primary gas on the non-permeate side is introduced into a secondary carbon dioxide separation device that employs an amine absorption method or a pressure swing adsorption (PSA) method to produce a secondary separated gas having a carbon dioxide concentration of 80% or more separated by the separation device and also produce a carbon-dioxide-removed gas having a carbon dioxide concentration of 2% or less.

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Osaka, Japan

Ken-ichi Sawamura