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  • 1 Departamento de Química Analítica e Inorgânica, Universidade Federal de Pelotas, Capao do Leao, RS, 96010-900, Brazil
  • | 2 Departamento de Química, Universidade Federal de São Carlos, Sao Carlos, SP, 13565-905, Brazil
  • | 3 Departamento de Química, Universidade Federal de Santa Catarina, Florianopolis, SC, 88040-900, Brazil
  • | 4 Instituto de Ciências Exatas e Biológicas, Departamento de Química, Universidade Federal de Ouro Preto, Campus Universitário s/n Bauxita, Ouro Preto, MG, 35400-000, Brazil
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Abstract

In the present study, TiO2 nanopowder was partially coated with Al2O3 precursors generated by a polymeric precursor method in aqueous solution. The system of nanocoated particles formed an ultra thin structure on the TiO2 nanoparticle surfaces, where the particle is the core and the nanocoating (additive) is the shell. The nanocoating process led to the obtainment of nanoparticles with important surface characteristics and catalytic behavior in the bioethanol dehydration reaction, with improved activity and particular selectivity in comparison to their non-coated analogs. Ethylene production was disfavored and selectivity toward acetaldehyde, hydrogen and ethane increased with increasing Al2O3 content in the catalysts. It is important to highlight that the TiO2–Al2O3 catalysts presented satisfactory values of selectivity toward hydrogen, in spite of the deactivation observed during the period of the test.

  • 1. Gonçalves, RF, Godinho, MJ, Leite, ER, Maciel, AP, Longo, E, Varela, JA 2007 J Mater Sci 42:2222 .

  • 2. Nair, AS, Tom, RT, Suryanarayanan, V, Pradeep, T 2003 J Mater Chem 13:297 .

  • 3. Chen, Q, Boothroyd, C, Soutar, AM, Zeng, XT 2010 J Sol-Gel Sci Technol 53:115 .

  • 4. Leite, ER, Carreño, NLV, Santos, LPS, Rangel, JH, Soledade, LEB, Longo, E, Campos, CEM F Lanciotti Jr Pizani, PS, Varela, JA 2001 Appl Phys A 73:567 .

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    • Search Google Scholar
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  • 5. Ribeiro, C, Longo, E, Leite, ER 2007 Appl Phys Lett 91:103105 .

  • 6. Stroppa, DG, Giraldi, TR, Leite, ER, Varela, JA, Longo, E 2008 Quim Nova 31:1706.

  • 7. Zhang, X, Wang, R, Yang, X, Zhang, F 2008 Micropor Mesopor Mater 116:210 .

  • 8. Chen, G, Li, S, Jiao, F, Yuan, Q 2007 Catal Today 125:111 .

  • 9. Takahara, I, Saito, M, Inaba, M, Murata, K 2005 Catal Lett 105:249 .

  • 10. Wu, LP, Li, XJ, Yuan, ZH, Chen, Y 2009 Catal Commun 11:67 .

  • 11. Wu, HX, Wang, TJ, Jin, Y 2006 Ind Eng Chem Res 45:1337 .

  • 12. Haryanto, A, Fernando, S, Murali, N, Adhikari, S 2005 Energy Fuels 19:2098 .

  • 13. Laosiripojana, N, Assabumrungrat, S 2006 Appl Catal B Environ 66:29 .

  • 14. Di Cosimo, JI, Diez, VK, Xu, M, Iglesia, E, Apesteguia, CR 1998 J Catal 178:499 .

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  • Impact Factor (2019): 1.520
  • Scimago Journal Rank (2019): 0.345
  • SJR Hirsch-Index (2019): 39
  • SJR Quartile Score (2019): Q3 Physical and Theoretical Chemistry
  • SJR Quartile Score (2019): Q4 Catalysis
  • Impact Factor (2018): 1.142
  • Scimago Journal Rank (2018): 0.374
  • SJR Hirsch-Index (2018): 37
  • SJR Quartile Score (2018): Q3 Physical and Theoretical Chemistry
  • SJR Quartile Score (2018): Q3 Catalysis

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Reaction Kinetics, Mechanisms and Catalysis
Language English
Size B5
Year of
Foundation
1974
Volumes
per Year
3
Issues
per Year
6
Founder Akadémiai Kiadó
Founder's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address
H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher
Chief Executive Officer, Akadémiai Kiadó
ISSN 1878-5190 (Print)
ISSN 1878-5204 (Online)