Mesoporous SBA-15 Silica-supported Diisopropylguanidine: an Efficient Solid Catalyst for Interesterification of Soybean Oil with Methyl Octanoate or Methyl Decanoate

Function of Brønsted and Lewis acid sites in xylose conversion into furfural

“…31,36 The SEM micrographs of SBA-15-(X)SO 3 H catalysts showed that all samples possess a wheat-like structure of SBA-15 (Fig. 3), 51,52 composed of small cylinders or rod-shaped aggregates. However, the micrograph of SBA-15-SO 3 H shows rod-like aggregates of smaller size than SBA-15 material, which is attributed to the low mesoscopic order found in the small angle XRD pattern of this material.…”

Mesoporous Silica-Based Catalysts for Biodiesel Production: A Review

“…SBA-15 immobilized with 1,3-dicyclohexyl-2-octylguanidine (DCOG) was prepared due to the fact that guanidine compounds are strong bases with higher basicities comparable to carbonates and alkali hydroxide [51,57,58]. The preparation involved the covalent attachment of DCOG onto the SBA15 surface, which increased the solid basicity and recyclability [58,59].…”

“…SBA-15 immobilized with 1,3-dicyclohexyl-2-octylguanidine (DCOG) was prepared due to the fact that guanidine compounds are strong bases with higher basicities comparable to carbonates and alkali hydroxide [51,57,58]. The preparation involved the covalent attachment of DCOG onto the SBA15 surface, which increased the solid basicity and recyclability [58,59]. With the similar reason of the strength of basicity, 1,5,7-triazabicycloij[4.4.0]dec-5-ene (TBD) and 1,1,3,3-tetramethylguanidine (TMG) were used to functionalize SBA-15 and MCF [41,51].…”

“…ChemEngineering 2023, 7, x FOR PEER REVIEW 10 of 24 comparable to carbonates and alkali hydroxide [51,57,58]. The preparation involved the covalent attachment of DCOG onto the SBA15 surface, which increased the solid basicity and recyclability [58,59].…”