The influence of holmium on catalytic properties of Fe or Cu-modified vermiculites

被引：7
作者：
Samojeden, Bogdan [1 ]
Grzybek, Teresa [1 ]
Kowal, Joanna [1 ]
Szymaszek, Agnieszka [1 ]
Jablonska, Magdalena [2 ]
Glaeser, Roger [2 ]
Motak, Monika [1 ]
机构：
[1] AGH Univ Sci & Technol, Fac Energy & Fuels, Al Mickiewicza 30, PL-30059 Krakow, Poland
[2] Univ Leipzig, Inst Chem Technol, Linnestr 3, D-04103 Leipzig, Germany
来源：
PHYSICOCHEMICAL PROBLEMS OF MINERAL PROCESSING | 2019年 / 55卷 / 06期
关键词：
selective catalytic reduction; deNO(x); holmium; vermiculite; TITANIA-PILLARED MONTMORILLONITE; ACID-ACTIVATED VERMICULITES; NO; TEMPERATURE; NH3; REDUCTION; SCR; OXIDE; IRON; CO;
D O I：
10.5277/ppmp19074
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Natural layered clay, vermiculite, was modified and tested as catalyst for the selective catalytic reduction of NOx with ammonia (NH3-SCR). Its modification included the application of the blowing agent (azodicarbonamide), acid treatment and pillaring with Al2O3. Active phase (transition metals: Cu or Fe) was introduced via impregnation. The obtained materials were characterized by N-2 sorption (texture), XRD (structure), DR-UV-Vis (oxidation state and aggregation of the active phase), H-2-TPR (reducibility of the active phase), in situ DRIFTS (types of adsorbed species due to contact of the sample NH3) and NH3-TPD (type/strength of the acidic sites). The initial modification procedures (treatment with azodicarboamide) resulted in the increase of specific surface area of vermiculite. The introduction of transition metal ions provided a significant amount of acidic sites. The promoting impact of holmium was confirmed by the increased strength of the sites. The highest catalytic activity was exhibited by the sample Fe-containing vermiculite and doped with Ho.
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收藏
页码：1484 / 1495
页数：12
相关论文
共 62 条
[1]   Effect of sonication conditions: Solvent, time, temperature and reactor type on the preparation of micron sized vermiculite particles [J].
Ali, Farman ;
Reinert, Laurence ;
Leveque, Jean-Marc ;
Duclaux, Laurent ;
Muller, Fabrice ;
Saeed, Shaukat ;
Shah, Syed Sakhawat .
ULTRASONICS SONOCHEMISTRY, 2014, 21 (03) :1002-1009
[2]  
[Anonymous], 2015, Official Journal of the European Union
[3]   Catalytic properties of Rh, Ni, Pd and Ce supported on Al-pillared montmorillonites in dry reforming of methane [J].
Barama, S. ;
Dupeyrat-Batiot, C. ;
Capron, M. ;
Bordes-Richard, E. ;
Bakhti-Mohammedi, O. .
CATALYSIS TODAY, 2009, 141 (3-4) :385-392
[4]  
Bergaya F, 2006, DEV CLAY SCI, V1, P393, DOI 10.1016/S1572-4352(05)01012-3
[5]   Selective catalytic reduction of nitric oxide with ammonia over zirconium-doped copper/ZSM-5 catalysts [J].
Bin, Feng ;
Song, Chonglin ;
Lv, Gang ;
Song, Jinou ;
Wu, Shaohua ;
Li, Xiaodong .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2014, 150 :532-543
[6]   Effect of Ho-doping on photocatalytic activity of nanosized TiO2 catalyst [J].
Cai Heshan ;
Liu Guoguang ;
Lue Wenying ;
Li Xiaoxia ;
Yu Lin ;
Li Daguang .
JOURNAL OF RARE EARTHS, 2008, 26 (01) :71-75
[7]   Mn-Ce/ZSM5 as a new superior catalyst for NO reduction with NH3 [J].
Carja, Gabriela ;
Kameshima, Yoshikazu ;
Okada, Kiyoshi ;
Madhusoodana, Changalla D. .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2007, 73 (1-2) :60-64
[8]   SCR of NO by NH3 on alumina or titania pillared montmorillonite modified with Cu or Co -: Part II.: Temperature programmed studies [J].
Chmielarz, L ;
Kustrowski, P ;
Zbroja, M ;
Gil-Knap, B ;
Datka, J ;
Dziembaj, R .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2004, 53 (01) :47-61
[9]   SCR of NO by NH3 on alumina or titania-pillared montmorillonite various modified with Cu or Co -: Part I.: General characterization and catalysts screening [J].
Chmielarz, L ;
Kustrowski, P ;
Zbroja, M ;
Rafalska-Lasocha, A ;
Dudek, B ;
Dziembaj, R .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2003, 45 (02) :103-116
[10]   Acid-activated vermiculites as catalysts of the DeNOx process [J].
Chmielarz, Lucjan ;
Wojciechowska, Magdalena ;
Rutkowska, Malgorzata ;
Adamski, Andrzej ;
Wegrzyn, Agnieszka ;
Kowalczyk, Andrzej ;
Dudek, Barbara ;
Boron, Pawel ;
Michalik, Marek ;
Matusiewicz, Adam .
CATALYSIS TODAY, 2012, 191 (01) :25-31
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