Anti-arsenic-poisoning SCR denitration catalyst and preparation method thereof
A denitrification catalyst and arsenic poisoning technology, applied in chemical instruments and methods, physical/chemical process catalysts, separation methods, etc., can solve the problems of rapid reduction in denitrification efficiency, poor activity, short life, etc., and improve the ability to resist arsenic poisoning , prolong life, inhibit the effect of deep poisoning
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[0027] Example 1
[0028] A preparation method of an arsenic-resistant SCR denitration catalyst, comprising the following steps:
[0029] (1) Mix ammonium metavanadate, ammonium molybdate and bismuth nitrate to obtain active raw materials; the mass ratio of vanadium element, molybdenum element and bismuth element in the active raw material is 0.83:6.66:3.59;
[0030] (2) Mixing the active raw material obtained in step (1) with citric acid in a mass ratio of 1:2, grinding for 30 min, then drying at 80 °C for 8 h, and calcining at 400 °C for 6 h to obtain active powder;
[0031] (3) Preparation of mixed mud, which is formed by mixing the following raw materials according to mass percentage: 15 parts of active powder obtained in step (2), 10 parts of structural aids, 0.1 part of tung oil, 2 parts of silica sol, 0.1 part of methyl cellulose, 2 parts of glass fiber, 73 parts of titanium dioxide and 45 parts of deionized water; wherein, the structural aid is obtained by mixing calc...
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[0035] Example 2
[0036] A preparation method of an arsenic-resistant SCR denitration catalyst, comprising the following steps:
[0037] (1) Mixing ammonium metavanadate, ammonium molybdate and bismuth nitrate to obtain active raw materials; the mass ratio of vanadium element, molybdenum element and bismuth element in the active raw material is 0.056:3.33:4.48;
[0038](2) Mixing the active raw material obtained in step (1) with citric acid in a mass ratio of 1:4, grinding for 90 min, then drying at 100 °C for 6 h, and calcining at 600 °C for 4 h to obtain active powder;
[0039] (3) Preparation of mixed mud, which is made by mixing the following raw materials according to mass percentage: 10 parts of active powder obtained in step (1), 18 parts of structural aids, 0.5 parts of tung oil, 3 parts of silica sol, 0.05 part of methyl cellulose, 6 parts of glass fiber, 66 parts of titanium dioxide and 55 parts of deionized water; wherein, the structural aid is obtained by mixing ...
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[0043] Example 3
[0044] A preparation method of an arsenic-resistant SCR denitration catalyst, comprising the following steps:
[0045] (1) Mix ammonium metavanadate, ammonium molybdate and indium chloride to obtain active raw materials; the mass ratio of vanadium element, molybdenum element and indium element in the active raw material is 0.056:3.33:1.65;
[0046] (2) Mixing the active raw material obtained in step (1) with citric acid in a mass ratio of 1:3, grinding for 30 min, then drying at 80 °C for 8 h, and calcining at 400 °C for 6 h to obtain active powder;
[0047] (3) Preparation of mixed mud, which is formed by mixing the following raw materials according to mass percentage: 7 parts of active powder obtained in step (1), 18 parts of structural aids, 0.1 part of tung oil, 1 part of silica sol, 0.05 part of methyl cellulose, 2 parts of glass fiber, 73 parts of titanium dioxide and 50 parts of deionized water; wherein, the structural aid is obtained by mixing calci...
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