钇掺杂三氧化二铁催化剂的脱硝性能研究

doi:10.19964/j.issn.1006-4990.2022-0090

Abstract

Abstract:

In order to improve the denitration performance of Fe₂O₃ catalyst and expand the active temperature window of the catalyst，the co-precipitation method was used to introduce the promoter Y to modify the Fe₂O₃ catalyst.The samples were characterized by X-ray diffraction（XRD），N₂ isothermal adsorption desorption（N₂-BET），X-ray photoelectron spectroscopy（XPS），NH₃ temperature programmed desorption（NH₃-TPD） and H₂ temperature programmed reduction（H₂-TPR）.The XRD and N₂-BET results showed that doping of Y changed the catalyst structure，increased the specific surface area and reduced pore size of the catalyst.The XPS and NH₃-TPD demonstrated that Y-doped Fe₂O₃had more surface adsorbed oxygen（O_I），Fe²⁺ and more acid amount.The H₂-TPR results showed that Y doping slightly reduced the redox ability of the catalyst.The denitration performance of Fe₂O₃ catalysts doped with different contents of Y at 150~400 ℃ was tested.Fe₉Y₁O _x catalyst had the best denitration activity，reaching 81.8% at 300 °C.

Key words: yttrium, denitration catalyst, Fe₂O₃

CLC Number:

O643.3

DU Peining,LUO Shizhong,Tan Renjun,JING Fangli. Study on denitration performance of Y doped Fe₂O₃ catalyst[J]. Inorganic Chemicals Industry, 2022, 54(11): 137-142.

Figures/Tables 11

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References 19

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样品	BET比表面积/ （m²·g^-1）	孔容/ （cm³·g^-1）	平均孔径/ nm
Fe₂O₃	18.4	0.12	26.3
Y₁Fe₁₅O _x	49.9	0.15	12.1
Y₁Fe₉O _x	115.4	0.14	4.8
Y₁Fe₅O _x	110.0	0.13	4.8

样品	NH₃含量/（mmol·g^-1）
样品	Peak1	Peak2	Peak3	总含量
Fe₂O₃	0.008	0.008	0.008	0.024
Y₁Fe₁₅O _x	0.020	0.047	—	0.067
Y₁Fe₉O _x	0.023	0.100	—	0.123
Y₁Fe₅O _x	0.025	0.090	—	0.115

样品	n（O_Ⅰ）/n（O_Ⅱ）/n（O_Ⅲ）	n（Fe²⁺）/n（Fe³⁺）
Fe₂O₃	14.0/78.5/7.6	58.0/42
Y₁Fe₁₅O _x	24.4/66.9/8.7	56.0/44
Y₁Fe₉O _x	30.2/63.6/6.2	62.8/37.2
Y₁Fe₅O _x	27.1/65/7.9	50.6/49.4

样品	H₂ 消耗量/（mmol·g^-1）			总量/ （mmol·g^-1）
样品	100~510 ℃	510~680 ℃	680~800 ℃	总量/ （mmol·g^-1）
Fe₂O₃	2.9	13.4	5.2	21.5
Y₁Fe₁₅O _x	9.5	7.8	2.3	19.6
Y₁Fe₉O _x	5.9	4.7	5.1	15.7
Y₁Fe₅O _x	3.5	6.6	1.0	11.1

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Study on denitration performance of Y doped Fe₂O₃ catalyst

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