| 摘要 |
<p>[Problem] To provide a method for processing (an) edge(s) of a catalyst-supporting honeycomb structure in an exhaust gas denitration apparatus, the method being capable of filling fine cracks on a surface of the catalyst layer which will become a cause of abrasion of an edge of the catalyst-supporting honeycomb structure by solid particles such as dust particles, coal ashes, etc. in an exhaust gas and sufficiently compensating abrasion resistant strength of the edge of the honeycomb structure. [Solution] In a catalyst-carrying honeycomb structure in an exhaust gas denitration apparatus, a corrugated plate-like inorganic fiber sheet and a flat plate-like inorganic fiber sheet, each supporting thereon a denitration catalyst containing a silica sol, titania particles, and ammonium metavanadate as a whole primary denitration catalyst layer, are alternately laminated. In a method for processing (an) edge(s) of a catalyst-supporting honeycomb structure, at least the edge of gas inlet side among the gas inlet side and the gas outlet side of the denitration catalyst-supporting honeycomb structure having the whole primary denitration catalyst layer is(are) dipped in a denitration catalyst-containing slurry for edge processing composed of a silica sol, titania particles or kaolin particles, and ammonium metatungstate to form (a) coating layer(s) of the denitration catalyst-containing slurry in the edge(s) of the honeycomb structure, and this(these) is(are) dried and then calcinated to form (an) edge secondary denitration catalyst layer(s).</p> |
