Hierarchical K/LTL zeolites: synthesis by alkali treatment, characterization and catalytic performance in knoevenagel condensation reaction
| Title | Hierarchical K/LTL zeolites: synthesis by alkali treatment, characterization and catalytic performance in knoevenagel condensation reaction |
| Publication Type | Journal Article |
| Year of Publication | 2016 |
| Authors | Tangale, NP, Sonar, SK, Niphadkar, PS, Joshi, PN |
| Journal | Journal of Industrial and Engineering Chemistry |
| Volume | 40 |
| Pagination | 128-136 |
| Date Published | AUG |
| ISSN | 1226-086X |
| Keywords | Basicity, Hierarchical zeolite, K/LTL, Knoevenagel condensation, Micro-mesoporous composite |
| Abstract | The hierarchical K/LTL zeolites prepared by post-synthesis modification with aqueous 1.5 M KOH solution by varying alkali volume to K/LTL zeolite (10-70 ml/g) ratios, were examined in Knoevenagel condensation. The physico-chemical properties of the catalysts were thoroughly evaluated by PXRD, ICP, CO2-TPD, XPS, N-2 adsorption/desorption and Si-29 and Al-22 MAS-NMR. Among all the samples, hierarchical K/LTL prepared by treating K/LTL with 50 ml aqueous 1.5 M KOH solution per gram of K/LTL displayed about 1.5 fold higher catalytic activity as compared to parent K/LTL, presumably because of combined effect of enhanced basicity and molecular diffusion through pore channels. (C)2016 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved. |
| DOI | 10.1016/j.jiec.2016.06.016 |
| Type of Journal (Indian or Foreign) | Foreign |
| Impact Factor (IF) | 4.179 |