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|Title:||Use of a low-cost template-free ZSM-5 for atmospheric petroleum residue pyrolysis|
|Authors:||Pergher, Sibele Berenice Castellã|
Caldeira, Vinícius P. S.
Santos, Anne G. D.
Costa, Maria J. F.
Araujo, Antonio S.
|Citation:||CALDEIRA, Vinícius P. S.; SANTOS, Anne G. D.; PERGHER, Sibele B. C.; COSTA, Maria J. F.; ARAUJO, Antonio S. Use of a low-cost template-free ZSM-5 for atmospheric petroleum residue pyrolysis. Química Nova, São Paulo, v. 39, n. 3, p. 292-297, Abr. 2016. ISSN 1678-7064 versão online. Disponível em: https://www.scielo.br/scielo.php?pid=S0100-40422016000300292&script=sci_arttext. Acesso em: 13 jul. 2020. http://dx.doi.org/10.5935/0100-4042.20160019|
|Portuguese Abstract:||To understand the physicochemical properties and catalytic activity during the pyrolysis of atmospheric petroleum residue, a templatefree ZSM-5 zeolite was synthesized using a direct method without additional seeds or an organic structure director and compared with conventionally synthesized ZSM-5. The crystallinities of the two zeolites were evaluated by XRD and FTIR and were quite similar; however, structural analyses using SEM and argon physisorption revealed that the zeolites diverged in particle diameter and in the external surface area of the micropores. The synthesis procedure without a template incorporated additional aluminum into the crystalline network, according to ICP-AES and TPD NH3 experiments. The catalytic pyrolysis performed over the template-free ZSM-5 generated results comparable to those for pyrolysis performed over the conventional ZSM-5 according to its hydrocarbon distribution. The selectivity to aromatics compounds was exactly the same for both ZSM-5 zeolites, and these values stand out compared to thermal pyrolysis. The template-free ZSM-5 produced 20% of light hydrocarbons (C4-C6), where such compounds are olefins and paraffins of great interest to the petrochemical industry. Therefore, template-free ZSM-5 is promising for industrial use due to its lowered synthesis time, low-cost and significant distribution to light hydrocarbons|
|Appears in Collections:||IQ - Artigos publicados em periódicos|
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