Properties of zeolite Y in various forms and utilization as catalysts or supports for cerium oxide in ethanol oxidation

Hierarchical K/LTL zeolites: Synthesis by alkali treatment, characterization and catalytic performance in Knoevenagel condensation reaction

“…23 Knoevenagel condensation of aldehyde or ketone with active 24 methylene group compounds to form bulky unsaturated products 25 (Scheme 1) is one of the most important base catalyzed reactions 26 involving C-C bond formation and plays a vital role in the synthesis 27 of fine chemical [3][4][5] and employed as a probe reaction for the 28 characterization of the basic catalysts [6,7]. The homogeneous 29 Knoevenagel condensation reaction is catalyzed by using various 30 liquid bases such as piperidine, amines, ammonia, and ammonium 31 salts [8].…”

“…The zeolite having hierarchical structure 47 provides the accessibility of active sites on the internal surfaces 48 which greatly influence the catalytic performance [20]. Several 49 attempts were made in order to modify zeolite structure to 50 generate mesoporosity in the microporous framework [21][22][23][24]. 51 Desilication is one of the promising post-synthesis modification 52 techniques by which the hierarchically structured zeolites with 53 intracrystalline mesoporosity can be synthesized owing to its 54 versatile, effective, scalable and green synthetic approach.…”

Platinum‐promoted fibrous silica Y zeolite with enhanced mass transfer as a highly selective catalyst for n ‐dodecane hydroisomerization

“…Also, higher hydroisomerization conversions are usually achieved at a higher temperature but mostly at the expense of the isomer product selectivity. A remarkable approach for the enhancing mass transfer and lowering the chance of hydrocracking reaction in zeolites is via postsynthetic desilication and dealumination of their frameworks . It helps in tuning the porosity and acidic nature of the resultant zeolites, but a significant portion of the acidic sites that are very vital to the hydroisomerization reaction usually become lost.…”

Study the Effect of Added 4wt% of Nickel Oxide, Ammonium Oxide and Cobalt Oxide over HZSM-5 Catalyst for the Catalytic reaction of Bio-Ethanol into Hydrocarbons

“…Conversion of ethanol to hydrocarbons over zeolite has been studied due to increase demand of hydrocarbons in the market [5][6][7][8][9][10][11][12][13][14]. Objective of this work is to investigate the influence of nickel oxide, ammonium oxide and cobalt oxide loading on catalytic performance of HZSM-5.…”