Synthesis and application of HZSM-5@silicalite-1 core–shell composites for the generation of light olefins from CH3Br

Li, Na; Zhang, Ying Ying; Chen, Lang; Au, Chak Tong; Yin, Shuang

doi:10.1016/j.micromeso.2016.02.017

Cited by 28 publications

(12 citation statements)

References 33 publications

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“…Growing a shell of catalytically inactive aluminium-free silicalite-1 zeolite with the same MFI zeolite framework as HZSM-5 zeolite along the external surface of HZSM-5 core crystal would reduce the external acidity while likely preserving the access and number of internal acid sites [39]. The applications of such core-shell HZSM-5/silicalite-1 materials have been demonstrated for simple reactants [40][41][42][43][44]. With respect to catalytic fast pyrolysis of biomass, Hu et al [38] recently tested a conventional HZSM-5 coated with silicalite-1 for upgrading of vapors from pine pyrolysis in a fixed bed (550 °C) located ex-situ and reported increased yields of benzene, toluene and xylenes (BTX) and decreased coke yields after silicalite-1 coating.…”

Section: Introductionmentioning

confidence: 99%

Performance of mesoporous HZSM-5 and Silicalite-1 coated mesoporous HZSM-5 catalysts for deoxygenation of straw fast pyrolysis vapors

Eschenbacher

Goodarzi

Saraeian

et al. 2020

Journal of Analytical and Applied Pyrolysis

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This is a PDF file of an article that has undergone enhancements after acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not yet the definitive version of record. This version will undergo additional copyediting, typesetting and review before it is published in its final form, but we are providing this version to give early visibility of the article. Please note that, during the production process, errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.

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Section: Introductionmentioning

confidence: 99%

Performance of mesoporous HZSM-5 and Silicalite-1 coated mesoporous HZSM-5 catalysts for deoxygenation of straw fast pyrolysis vapors

Eschenbacher

Goodarzi

Saraeian

et al. 2020

Journal of Analytical and Applied Pyrolysis

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“…Few reported researches work about synthesis of ZSM-5/all-silicon zeolites (e.g., MCM-41, SiO 2 , and Silicalite-1) composites. Most of the modified materials were used for catalytic properties, but few reports on removal adsorption of VOCs (Li et al, 2016; Pan et al, 2018; Xian et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Synthesis of ZSM-5/Siliceous Zeolite Composites for Improvement of Hydrophobic Adsorption of Volatile Organic Compounds

Chong

Altaf

et al. 2019

Front. Chem.

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In this research, we investigated the hydrophobicity and dynamic adsorption-desorption behaviors of volatile organic compounds (VOCs) by applying different optimized coating dosage (25, 50, and 75%) on designed novel ZSM-5/MCM-41 and ZSM-5/Silicalite-1 hierarchical composites. The relatively large specific surface area and pore volume of adsorbents ZSM-5/MCM-41 and ZSM-5/Silicalite-1 composites with excellent stability were affirmed by ex-situ XRD, FTIR, BET, SEM, and water contact angle analyses. Regarding, toluene adsorption-desorption investigation, ZSM-5/MCM-41 composite lead a longer stable toluene breakthrough time no matter under dry or 50% humid conditions. However, under different loading dosage condition, the breakthrough time of 75% coating ratio was the longest, which was 1.6 times as long as that of pure ZSM-5 under wet adsorption. Meanwhile, the complete elimination of toluene for ZSM-5/MCM-41-75% was done by largest desorption peak area and the lowest desorption temperature of 101.9°C, while, the largest contact angle of ZSM-5/MCM-41-75% was 17.0° higher than pure ZSM-5 zeolite. Therefore, we believe that the present hydrophobic sorbent will provide new insight with great research potential for removing low concentration of VOCs at industrial scale.

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“…A atividade catalítica é bastante influenciada quando se trata de materiais com estrutura porosa devido ao transporte de espécies químicas, pois a difusividade de moléculas reagentes assim como dos produtos formados no interior do meio poroso destes materiais depende do diâmetro dos poros. Moléculas maiores com o diâmetro próximo ao diâmetro de poro têm sua difusão prejudicada, ou restrição difusional, consequentemente, um acesso difícil aos sítios ativos do catalisador e produtos volumosos pode ficar retido ou ter sua formação desfavorecida [13,16].…”

Section: Resultsunclassified

Conversão catalítica de alquilaromáticos sobre catalisadores micro-mesoporosos em reator gás-sólido de leito fixo visando à obtenção de olefinas

Rêgo

Nascimento

et al. 2016

Scientia Plena

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O objetivo deste trabalho foi estudar a síntese e caracterização de catalisadores micro-mesoporosos e sua aplicação na reação modelo de conversão de isopropilbenzeno em microreator catalítico de leito fixo com fluxo contínuo visando à obtenção de olefinas. Catalisadores micro-mesoporosos do tipo HZSM-5/MCM-41e La/HZSM-5/MCM-41foram sintetizados através do método mecanosíntese e impregnação por via úmida, respectivamente. Os catalisadores foram caracterizados por difração de raios-X e através de reações com molécula modelo. Isopropilbenzeno (cumeno) foi usado como molécula modelo e a conversão em olefinas foi avaliada através da formação de propeno. Os difratogramas de raios-X indicaram que os catalisadores sintetizados apresentam os picos característicos da estrutura microporosa (zeólita ZSM-5) e a estrutura mesoporosa (MCM-41). Para os catalisadores contendo lantânio, picos devido à presença de óxido de lantânio também foram identificados. Os resultados indicaram que o catalisador compósito La/HZSM-5/MCM-41 foi o mais promissor na conversão do cumeno e produção de propeno.

show abstract

Synthesis and application of HZSM-5@silicalite-1 core–shell composites for the generation of light olefins from CH3Br

Cited by 28 publications

References 33 publications

Performance of mesoporous HZSM-5 and Silicalite-1 coated mesoporous HZSM-5 catalysts for deoxygenation of straw fast pyrolysis vapors

Performance of mesoporous HZSM-5 and Silicalite-1 coated mesoporous HZSM-5 catalysts for deoxygenation of straw fast pyrolysis vapors

Synthesis of ZSM-5/Siliceous Zeolite Composites for Improvement of Hydrophobic Adsorption of Volatile Organic Compounds

Conversão catalítica de alquilaromáticos sobre catalisadores micro-mesoporosos em reator gás-sólido de leito fixo visando à obtenção de olefinas

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