Koken Ltd.

N.e. Chemcat Corporation

Shingo Ishikawa

Takashi Yamada

Takeshi Honda

Yoshinori Takahashi

Gaku Sasaki

Hironobu Takeuchi

Kazuhiro Sekiyama

Seiji Taguchi

Mask

A honeycomb structure prevents catalyst slurry from leaching out when applying a wash coat for making a catalyst supported, ensuring air permeability of the outer portion and in which there is no occurrence of cracking when used as a gasoline particulate filter. The honeycomb structure having: a honeycomb substrate composed of porous partition walls forming a plurality of cells and a porous outer portion; and a resin composition on the outer portion of the honeycomb substrate, wherein the outer portion and the partition walls of the honeycomb substrate are formed of the same material; a porosity of the honeycomb structure is 50% or more; and the resin composition is impregnated into pores of the whole outer portion; and the impregnation depth is equal to the outer portion thickness or a part of the resin composition is impregnated deeper than the outer portion and reaches the cell partition walls.

Honeycomb structure, honeycomb structure type catalyst and production methods therefor

An air cleaning apparatus capable of predicting a breakthrough time of a filtering portion is provided. Regarding a maskas one example of the air cleaning apparatus, data on concentration of the poisonous gas element with which in ambient air () is contaminated on the upstream side of a filtering portion (), a flow rate of the air () passing through the filtering portion (), a temperature of the air (), and relative humidity of the air () are input to an arithmetic processing unit (). A breakthrough-time prediction formula in which the concentration, the flow rate, the temperature, and the relative humidity are provided as variables is programmed in the arithmetic processing unit (), and the breakthrough time of the filtering portion () is calculated through the prediction formula, based on the data on the concentration and the like.

Air cleaning apparatus and method for predicting breakthrough time for the same

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Tokyo, Japan

Shingo Ishikawa