Open AccessCarbon Molecular Sieve Supported Pd Catalyzed Hydrogenation of Cinnamaldehyde in Alkaline Medium
Author(s) -
R. Krishna,
C. Ramakrishna,
Bijendra Saini,
T. Gopi,
G. Swetha,
S. Chandra Shekar,
Srinivas Ankanagari
Publication year - 2021
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2021.23080
Subject(s) - cinnamaldehyde , chemistry , catalysis , selectivity , molecular sieve , aqueous solution , organic chemistry , alkali metal
Synthesis of various fine chemicals and pharmaceuticals are regulated through selective hydrogenationof α,β-unsaturated aldehydes. Hydrocinnamaldehyde is one of the important compounds in perfumeryand flavouring industries. It is highly precarious and challenging to control the product selectivity aswell as conversion in cinnamaldehyde hydrogenation. In this study, an effective hydrogenation ofcinnamaldehyde was attained in presence of aqueous-protic organic medium by utilizing Pd/CMSand other additives of alkali such as K2CO3. The Pd/CMS catalyst along with alkali media catalyzedthe hydrogenation of C=C selectively in cinnamaldehyde in order to form hydrocinnamaldehyde with100% conversion rate. Additionally, the parallel hydrogenation of C=O and C=C bonds incinnamaldehyde takes place in absence of media. The C=O bond reduction in cinnamaldehyde can berestricted through K2CO3 addition to aqueous-protic solution. The active sites of palladium were foundto be uniform and analyzed using HRTEM data. Based on the mechanism involved in micropores ofcarbon molecular sieves, the key role of promoter is associated with hydrogenation of cinnamaldehyde.The catalytic criterion was appropriate with the acquired activity data.