DICP OpenIR
Direct Cu2+ ion-exchanged into as-synthesized SAPO-34 and its catalytic application in the selective catalytic reduction of NO with NH3
Xiang, Xiao1,2; Yang, Miao1; Gao, Beibei1,2; Qiao, Yuyan1,2; Tian, Peng1; Xu, Shutao1; Liu, Zhongmin1
Source PublicationRSC ADVANCES
2016
ISSN2046-2069
DOI10.1039/c5ra22868a
Volume6Issue:15Pages:12544-12552
Indexed BySCI
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences
WOS SubjectChemistry, Multidisciplinary
WOS Research AreaChemistry
WOS KeywordELECTRON-SPIN-RESONANCE ; ONE-POT SYNTHESIS ; MOLECULAR-SIEVES ; CU/SAPO-34 CATALYSTS ; HYDROTHERMAL STABILITY ; ADSORBATE INTERACTION ; ECHO MODULATION ; CU(II) LOCATION ; LOW-TEMPERATURE ; NITRIC-OXIDE
AbstractA facile and direct ion-exchange (DIE) method has been developed to prepare Cu-exchanged SAPO-34s, in which as-synthesized SAPO-34 is used as a precursor. This approach is simple and economical as compared with the conventional multistep ion exchange procedure. The ion exchange behavior of the as-synthesized SAPO-34s is found to be template-dependent. For SAPO-34s templated by smaller amines, they show a better Cu exchange ability than the corresponding NH4+-SAPO-34 and the Cu loadings rise with the increasing template size. Coordination between amine and Cu2+ in the as-prepared DIE sample is clearly evidenced. However, oversized amine in the CHA cage may cause a failure of the DIE process due to the steric effect. An obvious surface Cu enrichment is observed for the as-prepared DIE sample, which migrates to the interior of the crystals upon calcination. The Cu-SAPO-34 catalyst prepared by DIE method displays excellent performance in the selective catalytic reduction of NO with NH3 (NH3-SCR). Its better low-temperature activity as compared with that of the conventional one is likely due to the higher isolated Cu2+ amount and surface Cu content. This promising strategy is expected to facilitate the large-scale industrial preparation of NH3-SCR catalyst.
Language英语
WOS IDWOS:000369545800082
PublisherROYAL SOC CHEMISTRY
Citation statistics
Document Type期刊论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/171417
Collection中国科学院大连化学物理研究所
Corresponding AuthorTian, Peng; Liu, Zhongmin
Affiliation1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Natl Engn Lab Methanol Olefins, Dalian 116023, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Xiang, Xiao,Yang, Miao,Gao, Beibei,et al. Direct Cu2+ ion-exchanged into as-synthesized SAPO-34 and its catalytic application in the selective catalytic reduction of NO with NH3[J]. RSC ADVANCES,2016,6(15):12544-12552.
APA Xiang, Xiao.,Yang, Miao.,Gao, Beibei.,Qiao, Yuyan.,Tian, Peng.,...&Liu, Zhongmin.(2016).Direct Cu2+ ion-exchanged into as-synthesized SAPO-34 and its catalytic application in the selective catalytic reduction of NO with NH3.RSC ADVANCES,6(15),12544-12552.
MLA Xiang, Xiao,et al."Direct Cu2+ ion-exchanged into as-synthesized SAPO-34 and its catalytic application in the selective catalytic reduction of NO with NH3".RSC ADVANCES 6.15(2016):12544-12552.
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