Methods for Pt-WO3/SBA-15 materials synthesis for glycerol conversion

被引:0
作者
Ferreira, Ana Luiza Freitas [1 ]
Abeyta, Kimberly Paim [1 ]
Silva, Jordan Gonzaga Andrade Batista [1 ]
Santos, Ronaldo Costa [1 ,2 ,3 ]
Pontes, Luiz Antonio Magalhaes [2 ]
机构
[1] Univ Fed Bahia, Programa Posgrad Engn Quim, Rua Prof Aristides Novis 2, BR-40210630 Salvador, BA, Brazil
[2] Inst Brasileiro Tecnol & Regulacao, Ave Tancredo Neves 2131,Caminho Arvores, BR-41820021 Salvador, BA, Brazil
[3] Ctr Univ Jorge Amado, Dept Engn, Ave Luis Viana Filho 6775, BR-41730101 Salvador, BA, Brazil
来源
MATERIA-RIO DE JANEIRO | 2023年 / 28卷 / 01期
关键词
Glycerol; SBA-15; wetness impregnation; mesoporous material; SELECTIVE HYDROGENOLYSIS; CATALYTIC CONVERSION; MESOPOROUS MATERIALS; CO-IMPREGNATION; ACID PROPERTIES; SBA-15; 1,3-PROPANEDIOL; PLATINUM; SUPPORT; WOX;
D O I
10.1590/1517-7076-RMAT-2022-0244
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Glycerol has applications as a raw material in different industrial processes, however, its supply exceeds demand. An alternative to increase the added value of this feedstock is its conversion into high added-value chemical products through dehydration and hydrogenation reactions, from which 1,2-PDO and 1,3-PDO can be obtained. To develop catalysts that increase the conversion and selectivity of these processes, materials of 2% Pt and 10% WO3 supported on SBA-15 were studied. Two methods were used for incipient wetness impregnation: sequential impregnation, with impregnation steps for each species, and co-impregnation, with a single impregnation step for both species. From the analysis of XRD, XRF, N2 isotherms, SEM, EDS, FTIR, and pyridine FTIR spectroscopy, it was possible to observe the influence of these methods on the structural and textural properties. It was verified that the co-impregnation provided a better dispersion of the WO3 species on the surface of the SBA-15 and that the reduction process, for both methodologies employed, showed an improvement in the metallic dispersion. The better dispersion of WO3 species also resulted in a greater formation of Bronsted acid sites for the co-impregnation method, with a predominance of Lewis sites in the structure of the catalysts obtained by both methods.
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页数:16
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