FIELD: process engineering.
SUBSTANCE: invention relates to automotive industry, particularly, to diesel offgas carbon-black filter with ceramic filter element with permeable channel walls and refractory coating applied thereon. Said coating 6 allows shutting off of the flow of carbon-black particles 7 on inlet side of pores 5 communicating inlet channels 1 and outlet channels in channels walls 4 but does no inhibit passage of offgas gaseous components there through. Such coating can be made from one or several refractory oxides or refractory fibrous material. This coating decreases deep filtration notably to reduce back pressure build up.
EFFECT: higher efficiency of filtration.
12 cl, 12 dwg
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