| 000 | 03774nlm1a2200445 4500 | ||
|---|---|---|---|
| 001 | 651605 | ||
| 005 | 20231030041041.0 | ||
| 035 | _a(RuTPU)RU\TPU\network\16854 | ||
| 090 | _a651605 | ||
| 100 | _a20161117a2016 k y0engy50 ba | ||
| 101 | 0 | _aeng | |
| 135 | _adrcn ---uucaa | ||
| 181 | 0 | _ai | |
| 182 | 0 | _ab | |
| 200 | 1 |
_aLow-temperature CO oxidation on Ag/ZSM-5 catalysts: Influence of Si/Al ratio and redox pretreatments on formation of silver active sites _fE. N. Kolobova [et al.] |
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| 203 |
_aText _celectronic |
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| 300 | _aTitle screen | ||
| 320 | _a[References: 62 tit.] | ||
| 330 | _aSilver catalysts supported on ZSM-5 (Si/Al = 30, 50 and 80) were investigated for low-temperature CO oxidation to study the nature of the silver active sites and their formation under the influence of the support chemical composition and redox pretreatments. The catalysts were characterized by HRTEM, FTIR, XPS, diffuse reflectance UV–Vis spectroscopy, NH3 thermodesorption (NH3 TPD) and temperature-programmed reduction (H2 TPR). The chemical composition (Si/Al ratio) of the ZSM-5 zeolite support significantly affects catalytic properties of Ag/ZSM-5 samples: the lower the Broensted acidity of the zeolite support, the higher the activity of the catalysts. Interestingly, while oxidizing pretreatment of catalysts led to a significantly better performance than reducing pretreatments, the consecutive reducing treatment of the preoxidized samples significantly promoted the catalytic activity for low-temperature CO oxidation. Thus, Ag/ZMS-5 catalyst with Si/Al = 80, pretreated consecutively in oxidizing and reducing conditions, showed the highest activity, reaching 90% CO conversion at just 40 °C. Comparison of activity and characterization results showed that silver particles with size below 2 nm are the most active; larger particles are just “spectators”. The most probable silver active centers in the low-temperature CO oxidation are ionic species, mostly charged clusters Agn?+, strongly interacting with the support. The obtained results in low-temperature CO oxidation might be of particular interest for neutralization of exhaust gases of car engines during “cold start”. | ||
| 333 | _aРежим доступа: по договору с организацией-держателем ресурса | ||
| 461 | _tFuel | ||
| 463 |
_tVol. 188 _v[P. 121-131] _d2016 |
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| 610 | 1 | _aтруды учёных ТПУ | |
| 610 | 1 | _aэлектронный ресурс | |
| 610 | 1 | _aнизкие температуры | |
| 610 | 1 | _aокисление | |
| 610 | 1 | _aсеребряные катализаторы | |
| 701 | 1 |
_aKolobova _bE. N. _cChemical Engineer _cdesign engineer of Tomsk Polytechnic University _f1989- _gEkaterina Nikolaevna _2stltpush _3(RuTPU)RU\TPU\pers\34488 |
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| 701 | 1 |
_aPestryakov _bA. N. _cChemist _cProfessor of Tomsk Polytechnic University, Doctor of Chemical Science _f1963- _gAleksey Nikolaevich _2stltpush _3(RuTPU)RU\TPU\pers\30471 |
|
| 701 | 1 |
_aMamontov _bG. V. _gGrigory Vladimirovich |
|
| 701 | 1 |
_aKotolevich _bYu. I. _gYuliya I. |
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| 701 | 1 |
_aBogdanchikova _bN. E. _gNina Evgenjevna |
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| 701 | 1 |
_aFarias _gM. H. |
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| 701 | 1 |
_aVosmerikov _cAleksandr V. _gA. V. |
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| 701 | 1 |
_aVosmerikova _cLyudmila V. _gL. V. |
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| 701 | 1 |
_aCortes _cCorberan V. _gC. V. |
|
| 712 | 0 | 2 |
_aНациональный исследовательский Томский политехнический университет (ТПУ) _bЭнергетический институт (ЭНИН) _bКафедра автоматизации теплоэнергетических процессов (АТП) _h121 _2stltpush _3(RuTPU)RU\TPU\col\18678 |
| 801 | 2 |
_aRU _b63413507 _c20170908 _gRCR |
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| 856 | 4 | _uhttp://dx.doi.org/10.1016/j.fuel.2016.10.037 | |
| 942 | _cCF | ||