Ngk Insulators, Inc.

Other

Nkk Corporation

Yuichi Murakami

Hiraoka, Masakatsu

Katsuhiro Tokura

Masakatsu Hiraoka

Kazuyuki Oshita

Yasuo Suzuki

Takashi Yokoyama

Makoto Miyahara

Kenji Yajima

Makiko Ichikawa

Toshihiko Iwasaki

Haruhito Tsuboi

Tadashi Hattori

Miki Yamagishi

Takashi Noto

Yoshinori Imoto

Osamu Ishikawa

Atsushi Satsuma

Takayuki Mori

Hideaki Muramatsu

A package comprises an airtight container having an oxygen permeability of less than or equal to 15 ml/mdMPa and water vapor permeability of less than or equal to 2 g/md, and a sub-nano membrane structure accommodated in the airtight container. The sub-nano membrane structure having a porous support and a sub-nano membrane. The sub-nano membrane formed on the porous support and having an average pore diameter of less than or equal to 1 nm.

Package, method for storing or transporting sub-nano membrane structure, and sub-nano membrane structure

An organic halogen compound-decomposing catalyst is provided, which affords excellent decomposing percentages even at low temperatures, and reduces the possibility of re-synthesizing dioxins and brominated dioxins. An organic halogen compound-decomposing catalyst is obtained by reacting a Pt salt and/or a Pd salt, an alkoxide derivative of Ti compound and an amino acid as an organic binder in a solvent, thereby synthesizing an organic metal precursor containing Pt and/or Pd and Ti in molecules thereof, and heating the organic metal precursor. This catalyst may be carried on a surface of a clean side of a ceramic filter. Since active points can be increased by uniformly dispersing the Pt and/or Pd particles in Ti particles, the catalyst has higher activity as compared with conventional catalysts, and exhibits excellent decomposing effects even at temperatures lower than 200&deg; C.

Process for producing organic halogen compound-decomposing catalysts, and a process for producing organic halogen compound-decomposing filters

An adsorbent and process for producing an absorbent capable of decomposing an organic halogen compound, is provided. The adsorbent can adsorb organic halogen compounds contained in waste gases and can assuredly decompose them without synthesizing them. A salt of Pt and/or Pd, an organic titanium compound and an organic binder are reacted in a solvent, to thereby synthesize a dispersion of an organic metal compound precursor containing Pt and/or Pd and Ti in molecules thereof, a sol of TiO is added to the dispersion to prepare a catalyst-coating solution, an activated carbon is impregnated with the catalyst-coating solution, and the resulting mixture is heated, thereby allowing the activated carbon to carry thereon an organic halogen compound-decomposing catalyst comprising TiO and, dispersed therein, fine particles of Pt and/or Pd. In a low temperature range of to &deg; C. in which the activated carbon is usable, organic halogen compounds in the exhaust gases can be decomposed, and SOx, NOx, HCl and heavy metals can be removed through adsorption.

Adsorbent having capability of decomposing organic halogen compounds and method for producing the same

Process for removing nitrous oxide (N.sub.2 O)

A method for removing nitrogen oxides and organic chlorine compounds from a combustion waste gas, which comprises the steps of: adding ammonia (NH.sub.3) as a reducing agent to a combustion waste gas containing nitrogen oxides and organic chlorine compounds; causing the combustion waste gas added with ammonia to contact with, while keeping the temperature of the combustion waste gas within a prescribed range, with a catalyst comprising at least one selected from the group consisting of platinum (Pt), palladium (Pd), ruthenium (Ru), manganese (Mn), copper (Cu), chromium (Cr) and iron (Fe) and oxides thereof, supported on the surface of a carrier comprising at least one selected from the group consisting of titanium oxide (TiO.sub.2), silicon oxide (SiO.sub.2), aluminum oxide (Al.sub.2 O.sub.3) and zirconium oxide (ZrO.sub.2), thereby removing nitrogen oxides and organic chlorine compounds from the combustion waste gas.

Method for removing nitrogen oxides and organic chlorine compounds from

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Nagoya, Japan

Katsuhiro Tokura