Preparation of 12-Tungstophosphoric Acid Embedded in a Silica Matrix and Its Effect on the Activity of 1‑Propanol Dehydration - Eduardo de Souza Mello Falcão; Deborah da Silva Valadares; Giovana Magalhães dos Santos; Estelle Silva Diorato Teixeira de Mendonça; Marcello Moreira Santos; Sílvia Cláudia Loureiro Dias; José Alves Dias (ACS Omega)