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Fe-PILC在贫燃条件下催化丙烯选择性还原NO
引用本文:李前程,苏亚欣,董士林,袁旻昊,周皞,邓文义. Fe-PILC在贫燃条件下催化丙烯选择性还原NO[J]. 燃料化学学报, 2018, 46(10): 1240-1248
作者姓名:李前程  苏亚欣  董士林  袁旻昊  周皞  邓文义
作者单位:1. School of Environmental Science and Engineering, Donghua University, Shanghai 201620, China;2. Changzhou Vocational Institude of Engineering, Changzhou 213164, China
基金项目:国家自然科学基金(51278095)和江苏省前瞻性联合研究项目(BY2015032-02)资助
摘    要:采用羟基铁离子柱撑Na-Mont制备了铁柱撑黏土催化剂(Fe-PILC),铁物种作为柱撑成分,同时充当活性组分,研究其在贫燃条件下催化丙烯选择性还原NO的特性。通过XRD、N_2吸附-脱附、H_2-TPR、UV-vis、Py-FTIR等方法对催化剂进行物理化学性质表征,进一步研究其反应机理。研究表明,1.0Fe-PILC在450-600℃时NO的转化率超过98%,N_2的选择性可达97%以上,且抗水蒸气和SO_2的能力较强。XRD和N_2吸附-脱附研究表明,Fe-PILC中铁物种柱撑进入Na-Mont层间,使催化剂的比表面积和孔容增大。H_2-TPR研究表明,Fe-PILC在400℃左右还原能力较强,主要体现为Fe~(3+)→Fe~(2+)的还原。UVvis研究表明,Fe-PILC的脱硝活性与铁氧低聚物种FexOy呈正相关。Py-FTIR研究表明,Fe-PILC表面同时含有Lewis酸和Br■nsted酸性位,Lew is酸性位是C_3H_6与NO进行催化反应的主要活性中心。

关 键 词:贫燃条件  铁柱撑黏土  丙烯  选择性催化还原  NO  
收稿时间:2018-06-22

Fe-PILC for selective catalytic reduction of NO by propene under lean-burn conditions
LI Qian-cheng,SU Ya-xin,DONG Shi-lin,YUAN Min-hao,ZHOU Hao,DENG Wen-yi. Fe-PILC for selective catalytic reduction of NO by propene under lean-burn conditions[J]. Journal of Fuel Chemistry and Technology, 2018, 46(10): 1240-1248
Authors:LI Qian-cheng  SU Ya-xin  DONG Shi-lin  YUAN Min-hao  ZHOU Hao  DENG Wen-yi
Abstract:Iron-pillared clays (Fe-PILC) were prepared by ion-exchange method and the iron species act as the pillaring components and active components and their performances for selective catalytic reduction of NO by propene were investigated under lean-burn conditions. XRD, N2 adsorption/desorption, H2-TPR, UV-vis, Py-FTIR, etc were used to characterize the catalysts. The results showed that 1.0Fe-PILC reduced more than 98% of NO at 450-600℃ and the selectivity for N2 reached 97%. The catalytic activity of the 1.0Fe-PILC was slightly influenced by water vapor and SO2. XRD and N2 adsorption/desorption characterization results showed that the iron species entered the Na-Mont interlayer and formed much larger specific surface area and pore volume. H2-TPR results indicated that Fe-PILC had a strong reduction ability at about 400 ℃, which represented the reduction of Fe3+→Fe2+. UV-vis results showed that the denitrification activity of Fe-PILC was positively correlated with the iron oxide oligomer FexOy. Py-FTIR results revealed that Lewis acid and Brønsted acid sites formed on the Fe-PILC surface. The main catalytic activity center of C3H6 and NO reaction was the Lewis acid site.
Keywords:lean-burn conditions  Fe-PILC  C3H6  selective catalytic reduction  NO  
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