Do Cu(II) ions need Al atoms in their environment to make CuSiBEA active in the SCR of NO by ethanol or propane? A spectroscopy and catalysis study

Dźwigaj, Stanisław; Janas, Janusz; Gurgul, Jacek; Socha, Robert P.; Shishido, Tetsuya; Che, Michel

doi:10.1016/j.apcatb.2008.07.003

Cited by 77 publications

(63 citation statements)

References 62 publications

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“…4. These results confirm that the presence of copper ions in the framework of zeolite is necessary to promote the activity in SCR of NO, in line with earlier report [19]. The incorporation of Cu into SiBEA as isolated pseudo-tetrahedral Cu(II), evidenced by DR UV-vis and TPR investigations (Figs.…”

Section: Temperature-programmed Reduction (Tpr)supporting

confidence: 79%

“…Fe x SiBEA, Cu x SiBEA and Fe x Cu x SiBEA zeolites (where x = 1.0 wt % of Fe or Cu, respectively) were prepared by the two-step postsynthesis procedure reported earlier [18,19]. In the first step, 2 g of HAlBEA zeolite, obtained by calcination in air at 823 K for 15 h of tetraethylammonium form of BEA (TEABEA) zeolite (Si/Al = 12.5), provided by RIPP (China) was treated with 13 mol L -1 HNO 3 solution under stirring (4 h, 353 K) to remove aluminium from the zeolite structure.…”

Section: Methodsmentioning

confidence: 99%

“…10,11,16], in which the dual layer catalysts were thoroughly investigated, our approach is to obtain single zeolite containing simultaneously two metal cations (Cu and Fe) by two-step postsynthesis and conventional wet impregnation procedures. As it was earlier shown [18,19] for iron and copper, it is possible to…”

Section: Introductionmentioning

confidence: 99%

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Influence of Cu on the catalytic activity of FeBEA zeolites in SCR of NO with NH 3

Boroń

Chmielarz

Dźwigaj

2015

Applied Catalysis B: Environmental

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Section: Temperature-programmed Reduction (Tpr)supporting

confidence: 79%

Section: Methodsmentioning

confidence: 99%

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Influence of Cu on the catalytic activity of FeBEA zeolites in SCR of NO with NH 3

Boroń

Chmielarz

Dźwigaj

2015

Applied Catalysis B: Environmental

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“…In the spectrum of CuTaSiBEA the bands at the range of 216-267 nm could be attributed to CT transitions between O 2and isolated mononuclear Ta 5+ and Cu 2+ species and oxidized copper clusters. 28,30,31,33,34 The absence of the bands in the range of 300-600 nm (Fig. 2) assigned to the 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 10 O 2-→ Cu 2+ CT and/or d-d transitions of octacoordinated Cu(II) indicates the absence of any bulk metal oxides on the surface of CuTaSiBEA.…”

Section: Acs Sustainable Chemistry and Engineeringmentioning

confidence: 99%

Ethanol Conversion into 1,3-Butadiene by the Lebedev Method over MTaSiBEA Zeolites (M = Ag, Cu, Zn)

Kyriienko

Larina

Soloviev

et al. 2017

ACS Sustainable Chem. Eng.

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Tantalum-containing SiBEA zeolite with isolated framework mononuclear Ta(V) doped with Ag, Cu and Zn were prepared and characterized by XRD, XPS, DR UV-VIS and FTIR (with 2 of additional dehydrogenation sites. Such modification allows accelerating ethanol dehydrogenation to acetaldehyde and subsequent steps of the ethanol-to-butadiene process.Ethanol conversion and butadiene selectivity over the catalysts increase in the order: TaSiBEA < ZnTaSiBEA < AgTaSiBEA < CuTaSiBEA. Higher selectivity to butadiene (73 %) was achieved over CuTaSiBEA (at 88% ethanol conversion, T = 598 К, WHSV = 0.5 h -1 ). 22ASSOCIATED CONTENT Supporting Information. The details of the calculations of the amount of recycled CO 2 in 1,3-butadiene production from biomass, XP spectra, TEM images and diffraction patterns, additional catalytic results. This material is available free of charge via the Internet at http://pubs.acs.org. AUTHOR INFORMATION Corresponding Authors* E-mails: pavlo_kyriienko@ukr.net (P.K.) and stanislaw.dzwigaj@upmc.fr (S.D.).

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“…Many researches demonstrated that the most active catalysts tend to have the lowest Si/Al atomic ratio because only copper ions close to framework AlO4 -are active in the decomposition of NO into N2 [10][11][12]. Unfortunately, too much aluminum anchored in the framework of ZSM-5 led to marked decrease in hydrothermal stability.…”

Section: Introductionmentioning

confidence: 99%

Cerium doped copper/ZSM-5 catalysts used for the selective catalytic reduction of nitrogen oxide with ammonia

Dou

Wang

et al. 2015

Chemical Engineering Journal

124

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Abstract:The CuCe/ZSM-5 catalysts with different cerium loadings (0, 0.5, 1.0, 1.5 and 2.0 wt.%) was investigated to evaluate the correlation between structural characteristics and catalytic performance for the selective catalytic reduction (SCR) of NO by NH3. It was found that the addition of cerium increased copper dispersion and prevented its crystallization. According to the results of X-ray photoelectron spectroscopy (XPS) and temperature-programmed reduction by hydrogen (H2-TPR), copper species were enriched on the ZSM-5 grain surfaces and part of copper ions was incorporated into the cerium lattice. Addition of cerium improved the redox properties of the CuCe/ZSM-5 catalysts, owing to the higher valence of copper and mobility of lattice oxygen than those of Cu/ZSM-5 catalyst. Hence the introduction of * Corresponding author. Tel.: +86-22-60601278; Fax.: +86-22-60600320 E-mail address: haoqinglan@tust.edu.cn ** Corresponding author. Tel.: +822 2220 0441; fax: +822 2220 2299 (K. Hui)E -mail address: kshui@hanyang.ac.kr (K. Hui) 2 cerium in Cu/ZSM-5 improved significantly NO conversion. On the one hand, the cerium introduction into Cu-Z enhances their low-temperature activities. 95% NO conversion is reached around 197 ºC for Cu-Z while the corresponding temperature value decreases to 148 ºC for CuCe4-Z. On the other hand, the temperature range of efficient NO reduction (95%) also extends to higher temperature when the cerium are added to Cu/ZSM-5. Among the Cu-Ce/ZSM-5 catalysts tested, the CuCe4-Z sample exhibits the highest catalytic activity with the temperature range for 90% NO removal of 148-427 ºC.

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Do Cu(II) ions need Al atoms in their environment to make CuSiBEA active in the SCR of NO by ethanol or propane? A spectroscopy and catalysis study

Cited by 77 publications

References 62 publications

Influence of Cu on the catalytic activity of FeBEA zeolites in SCR of NO with NH 3

Influence of Cu on the catalytic activity of FeBEA zeolites in SCR of NO with NH 3

Ethanol Conversion into 1,3-Butadiene by the Lebedev Method over MTaSiBEA Zeolites (M = Ag, Cu, Zn)

Cerium doped copper/ZSM-5 catalysts used for the selective catalytic reduction of nitrogen oxide with ammonia

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