Synthesis of Sn-MCM-41 at Low Temperature: Effect of the Synthesis Parameters on the Structural, Textural, and Catalytic Properties

Autor(es)

Lorenti, Juliana P. ^[1] ; Scolari, Eduardo ^[1] ; Finger, Pedro H. ^[1] ; Plass, Winfried ^[2] ; Gallo, Jean Marcel R. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Chem, Grp Renewable Energy Nanotechnol & Catalysis Gree, Rod Washington Luis, Km 235, BR-13565905 Sao Carlos, SP - Brazil

^[2] Friedrich Schiller Univ Jena, Inst Inorgan & Analyt Chem, Humboldtstr 8, D-07743 Jena - Germany

• Tipo de documento: Artigo Científico
• Fonte: European Journal of Inorganic Chemistry; v. 2021, n. 23, p. 2231-2240, JUN 21 2021.
• Citações Web of Science: 0

Resumo

Sn containing MCM-41 has gained attention for catalytic applications due to the recent popularization of the Sn-Beta Zeolite as a water-compatible Lewis acid catalyst. In the synthesis of Sn containing MCM-41 at high temperature, it has been shown that the silica source, the type of base, and the temperature can affect the structural, textural, and catalytic properties. Herein, a sustainable synthesis of Sn-MCM-41 at low temperatures (25 to 75 degrees C) and using the low (cetyltrimethylammonium bromide, CTAB)/SiO2 molar ratio of 0.11 is proposed. It is also studied the effect of the synthesis temperature, reaction pH, nature of the base, and Sn loading in the structural, textural, and catalytic properties of Sn-MCM-41. Sn-MCM-41 synthesized with NH4OH as base presented XRD patterns typical for the MCM-41 structures, while the synthesis using tetramethylammonium hydroxide (TMAOH) led to porous materials with a low periodicity of the pores. Using both NH4OH or TMAOH as hydroxides allowed the introduction of Sn in the silica framework, although the materials prepared with TMAOH displayed a higher contribution of pentacoordinated and extraframework Sn. All the Sn-MCM-41 prepared in this work were active in converting glucose into fructose, showing performance superior to Sn-MCM-41 prepared at high temperature. (AU)

• Processo FAPESP: 16/02128-2 - Desenvolvimento de novos sistemas catalíticos para a biorrefinaria
• Beneficiário: Jean Marcel Ribeiro Gallo
• Modalidade de apoio: Auxílio à Pesquisa - Jovens Pesquisadores
• Processo FAPESP: 17/11027-8 - Catalisadores bifuncionais à base de fosfato para a conversão de sacarídeos derivados da biomassa
• Beneficiário: Pedro Henrick Finger
• Modalidade de apoio: Bolsas no Brasil - Doutorado