Ngk Insulators, Inc.

Other

Nkk Corporation

Nippon Shokubai Kagaku Kogyo Co., Ltd.

Katsunosuke Hara

Masakatsu Hiraoka

Yoshinori Imoto

Yasuo Suzuki

Takashi Yokoyama

Akira Inoue

Kunio Sano

Toshihiko Iwasaki

Haruhito Tsuboi

Miki Yamagishi

Takashi Noto

Osamu Ishikawa

Tsuyoshi Majima

Method for removing organic chlorine compounds from combustion waste gas

A catalyst composition including component A and component B, the component A being a carrier, preferably having a honeycomb structure, and being a single-component oxide or a multi-component composite oxide of at least one metal of titanium, silicon and zirconium, and the component B being a catalyst component deposited on the carrier of component A and being at least one member selected from the group of noble metals and other specifically limited metals and their oxides, is very effective for decomposing and removing poisonous organic chlorine compounds, such as dioxin and the like, or poisonous organic chlorine compound-forming substances contained in an exhaust gas exhausted from an incinerator of an incineration plant provided with the incinerator and a dust collector. In addition, and the generation of the poisonous organic chlorine compound from the incineration plant can be prevented.

Method of treating exhaust gas

An excellent method of decomposing flon is provided which can decompose flon economically with high decomposition efficiency without necessitating high temperature and high pressure by contacting a gas containing a flon with a catalyst at a condition of a temperature of not less than 200.degree. C. and space velocity of not over than 50,000 (hr.sup.-1).

Method of decomposing flow

A pyrolysis process for treating sewage sludge containing chromium by burning combustible gas produced by thermal decomposition of the sewage sludge in a pyrolysis furnace by supplying oxygen of less than the theoretical amount necessary for burning the sewage sludge and keeping a partial pressure of oxygen in the furnace substantially at zero reduces the amount of hexavalent chromium remaining in the pyrolyzed residue to a harmless degree, and does not pollute the environment, has a large treating capacity, and is small in the necessary amount of fuel.

Pyrolysis process for treating sewage sludge containing chromium

Growing community of inventors

Kariya, Japan

Katsunosuke Hara