Catalytic Properties of ZnLaZrSi-Oxide Systems in the Process of Obtaining 1,3-Butadiene from Ethanol–Aqueous Mixtures

A study of the conversion of ethanol to 1,3-butadiene: effects of chemical and structural heterogeneity on the activity of MgO–SiO2 mixed oxide catalysts

“…Several studies have demonstrated that the increase of ETB activity was higher than that, which would have been simply proportional with the increase of specific surface area (SSA), induced by the modification. 31,39,40 Different types of high-SSA silica materials, such as SBA-15 18,24,31,[41][42][43][44][45] , SBA-16 31,33,36 , MCM-41 4,41 , MCM-48 41 , TUD-1 39,40,46,47 , COK-12 4 , Q-6, and KSMG 31 , as well as, zeolites, having the framework type LTA 48 and BEA 39,41,[48][49][50][51][52][53][54][55] , which zeolites were of high Si-to-Al ratio or were dealuminated, have been studied in the ETB reaction. The combination of high-SSA silica or silica-containing materials with magnesia gave catalysts of significant activity.…”

“…In addition to the structure-strengthening effect, the silica coating provides acidic properties and, thereby, ETB activity to the material. Recently, Larina et al 41,45 established that the porous structure (SSA, pore size distribution) of the silica component of MgO-SiO 2 catalysts is not an essential factor from the point of view of achieving high BD yields. The present study deals with three novel MgO-SiO 2 preparations, containing a HSM component.…”