日本ゼオライト学会　刊行物 Publication of Japan Zeolite Association

Zeolites are used as crystalyst and catalyst supports because of their unique crystal structure, and it is necessary to form to honeycomb structure in most cases. However there are mainly two problems when zeolite powder is formed to honeycomb structure. One of the problem of forming, zeolite powder has no plasticity, so it is very difficult to mold. Another problem is that the molded articles of zeolites must be calcined at low temperature to maintain the crystal structure of zeolites, so it is hard to obtain the calcined article of zeolite honeycomb having sufficient strength for an effective use. We have made investigations in the methods of plastic molding of zeolite powder. And we have solved such problems as above discribed by the use of Biopolymer (BIOPOLY™P), produced by soil microorganisms, as plasticizers and mixture of 1 : 1 layer-type clay minerals and 2 : 1 layer-type ones as inorganic sintering agents. In this report, the result of this investigation is discrived, and then the results of study on the selective catalytic reduction of nitrogen monoxide (NO) on Cu-MFI zeolite honeycomb catalysts as an applied example of zeolite honeycomb is described.