Kubota Corporation

Other

The Japan Steel Works, Ltd.

Jun Funakoshi

Akira Kosaka

Takashi Nishi

Ryutaro Motoki

Shigeru Tanaka

Takashige Ishida

Akira Shinosaki

Shuzo Matsumura

Takahiro Kaba

Hideo Fujita

Masaji Yoneta

Hiroyuki Araragi

Masao Hattori

Satoshi Hagi

Rokuro Denda

Yoshito Umeda

Tetsuo Kimura

A hydrocarbon gas to be decomposed, optionally mixed with water vapor, is allowed to flow through the gap between various porous tubesconstituting a group of porous tubes provided extending vertically in a decomposition reaction columnwhile air or oxygen is jetted homogeneously from the interior to the exterior of the porous tubes in the direction perpendicular to the stream of the hydrocarbon gas to be decomposed, optionally mixed with water vapor. The mixture is then ignited to form a diffusion flame layer B on the outer surface of the porous tubes. With the diffusion flame layer as a heat source, the hydrocarbon gas to be decomposed, optionally mixed with water vapor, undergoes pyrolysis.

Process and apparatus for the pyrolysis of hydrocarbon gas

A sintered porous metal filter permitting passage of gases therethrough comprises a filter portion having specified pores for trapping dust as separated from the gas to be treated, and a support portion for supporting the filter portion, the support portion having pores greater than the pores of the filter portion to diminish the pressure loss of the gas to be treated, the filter portion comprising metal particles of small diameter, the support portion comprising metal particles having a greater diameter than the filter portion forming metal particles, the filter portion and the support portion being formed to provide an outer side and an inner side integral therewith by sintering the two kinds of metal particles by hot isostatic pressing. A catalyst reaction portion for rendering noxious components of the gas to be treated harmless is formed in the filter portion or the support portion, or as an independent catalyst layer.

Sintered metal filters

A sintered porous metal filter permitting passage of gases therethrough includes a filter portion having specified pores for trapping and separatin dust from the gas to be treated, and a support portion for supporting the filter portion. The support portion has pores greater than the pores of the filter portion to diminish the pressure loss of the gas to be treated. The filter portion includes metal particles of small diameter, and the support portion includes metal particles having a greater diameter than the filter portion forming metal particles. The filter portion and the support portion are formed by sintering the two kinds of metal particles by hot isostatic pressing to provide an outer side and an inner side integrally. A catalyst reaction portion is formed in the filter portion or the support portion, or as an independent catalyst layer to make noxious components of the gas harmless.

The porous metal body of the inventtion has a porosity of 7 to 50%, pore sizes of 1 to 500 .mu.m and a pore distribution satisfying the relationship of:

Porous metal body and process for producing same

A heat-resistant material having excellent high-temperature strength and high oxidation resistance at temperatures exceeding 1300.degree. C. The material is a heat-resistant Cr-Fe alloy including at least 60% of Cr and at least 5% of Fe, and having a mean grain size of at least 50 .mu.m and having a melting point of at least 1600 .degree. C., or a composite material composed of the said heat-resistant alloy serving as a metal matrix and a ceramic, and containing up to 40% by volume of a dispersed ceramic phase in the metal matrix.

Heat-resistant materials

Growing community of inventors

Suita, Japan

Jun Funakoshi