“Trapless” Trap – A Catalytic Combustion System of Diesel Particulates Using Ceramic Foam

Yoji Watabe; Koichi Irako; Toshiyuki Miyajima; Toshio Yoshimoto; Yuichi Murakami

doi:10.4271/830082

1983-02-01

“Trapless” Trap – A Catalytic Combustion System of Diesel Particulates Using Ceramic Foam 830082

“Trapless” Trap, which makes possible the effective collecting of particulates in diesel exhaust gas and their simultaneous combustion has been developed by use of a ceramic foam in combination with catalysts containing copper salt. From a TEM photograph, it was observed that the particulate was rapidly oxidized by mobile copper ion, showing worm-eaten like spots. Screening of various base metal salts by TGA presented CUCl₂-KCl-NH₄VO₃ and CuCl₂-KCl-(NH₄)₆Mo₇O₂₄ as very active catalysts for diesel particulate oxidation. They had thermal stability up to 900°C when they were supported on titania. The results obtained by measuring the back pressure using 1.8L diesel engine suggest the above trap to be a self-cleaning trapless trap.

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“Trapless” Trap – A Catalytic Combustion System of Diesel Particulates Using Ceramic Foam 830082

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