NH3-SCR performance of modified SAPO-34 molecular sieve

被引：2
|
作者：
He P. [1 ]
Shen D. [1 ]
Liu G. [1 ]
机构：
[1] Key Laboratory of Energy Thermal Conversation and Control of Ministry of Education, Southeast University, Nanjing
来源：
Dongnan Daxue Xuebao | / 3卷 / 513-520期
关键词：
Impregnated catalyst; Nitrogen oxides; SAPO-34 molecular sieve; Selective catalytic reduction;
D O I：
10.3969/j.issn.1001-0505.2017.03.017
中图分类号：
学科分类号：
摘要：
The new impregnated catalyst with low temperature, low cost and high efficiency was prepared for NH3-SCR denitration by choosing SAPO-34 molecular sieve as support and impregnating Cu, Mn and Cu-Mn. Three factors were studied, such as different active ingredients, impregnated quantity, calcination temperature, and characterized means using nitrogen adsorption-desorption(BET), X-ray diffraction(XRD), NH3 temperature programmed desorption(NH3-TPD), transmission electron microscope(TEM) and X-ray photoelectron spectroscopy(XPS). The activity test results show that Cu-Mn bimetallic co-load is better than that of Cu or Mn single metal supported catalyst. When the loading amounts of Cu and Mn are 2% and 6% respectively, the calcination temperature is 450℃, the activity of the catalyst is the best, and it can reach 90% or more between 180 to 330℃. The analysis results show that compared with loading Cu or Mn, the Cu-Mn can weaken the effects on the active component and the molecular sieve, promote active component dispersed more evenly on the surface of the catalyst. The introduction of Cu can increase the ratio of valent Mn and improve the activity of the catalyst, the introduction of Mn can properly adjust the rate of Cu2+/Cu+ and broaden the activity temperature window of the catalyst. © 2017, Editorial Department of Journal of Southeast University. All right reserved.
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页码：513 / 520
页数：7
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