WO 2022/021928 A1

Thallium poisoning-resistant core-shell honeycomb catalyst for cement kiln flue gas denitration and preparation method therefor

(22) 07.04.2021

(43) 03.02.2022

(57) Disclosed are a thallium poisoning-resistant core-shell honeycomb catalyst for cement kiln flue gas denitration and a preparation method therefor. Said catalyst is a core-shell catalyst, V-W/TiO2 added with an anti-thallium additive is used as the core structure, and a metal oxide thin film is used as the shell structure. The thallium-resistant additive includes elemental gallium and/or elemental indium. The denitration catalyst prepared in the present invention has an anti-thallium poisoning capability which is 2 to 3 times higher than that of the existing catalyst, and the denitration efficiency is stably maintained at 90% or more, thereby achieving the breakthrough of denitration catalyst technology under the condition of cement kiln thallium-containing flue gas. By means of the catalyst of the present invention, the service life of an SCR denitration catalyst can be prolonged, the use costs of a denitration system are reduced, the adaptability of the SCR denitration catalyst in a thallium-containing flue gas condition is improved, and the production costs of denitration operation and management are reduced, and thus the catalyst has great economic value.

(71) Jiangsit Longkingcotech Co., Ltd., Jiangsu 224000 (CN)

(84) ARIPO (BW, GH, GM, KE, LR, LS, MW, MZ, NA, RW, SD, SL, ST, SZ, TZ, UG, ZM, ZW), Eurasian (AM, AZ. BY, KG, KZ, RU, TJ, TM), European (AL, AT, BE, BG, CH, CY, CZ, DE, DK, EE, ES, FI, FR, GB, GR, HR, HU, IE, IS, IT, LT, LU, LV, MC, MK, MT, NL, NO, PL, PT, RO, RS, SE, SI, SK, SM, TR), OAPI (BF, BJ, CF, CG, CI, CM, GA, GN, GQ, GW, KM, ML, MR, NE, SN, TD, TG)

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