Synthesis of hydrothermally stable MCM-41 by the seed crystallization and its application as a catalyst support for hydrodesulfurization

Al-MCM-41 Synthesized from Kaolin via Hydrothermal Route: Structural Characterization and Use as an Efficient Adsorbent of Methylene Blue

“…There is a clear predominance of Q 4 sites over the others, since the signal at -109 ppm presents higher intensity, which indicates highly cross-linked framework walls. 51 Furthermore, the Q 3 / Q 4 ratio provides a way of measuring the degree of silanol group condensation: the smaller this ratio the higher the degree of silanol condensation. 48 In Figure 5a, a single strong peak at d = -2.5 ppm is observed in the 27 Al NMR, which might be assigned to 6-coordinated Al (Al VI ).…”

Novel nanostructured-TiO2 materials for the photocatalytic reduction of CO2 greenhouse gas to hydrocarbons and syngas

“…Mesoporous silicas [20,21], due to their combination of good accessibility, uniform pore size and high surface area, are interesting candidates for the nanocasting technique to produce various nano-replica materials [22]. KIT-6 (Korea Advanced Institute of Science and Technology-6) has a 3-dimensional (gyroid cubic Ia3d) pore structure and a large pore size, and it has already received the attention of many researchers for different applications [20,23].…”

Hydrodesulfurization of dibenzothiophene over PtMo/MCM-48 catalysts

“…In this sense, the sulfur removal from petroleum feedstock has been an important issue of global concern due to the sulfur in fuels acts as pollutant [1][2][3][4][5]. The use of noble metals as active phases or as promoters has attained a high interest due to the good performance in hydrotreating (HDT) and hydrogenation (HYD) reactions [6,7].…”