Selective catalytic oxidation of geraniol to citral with molecular oxygen in supercritical carbon dioxide
| Title | Selective catalytic oxidation of geraniol to citral with molecular oxygen in supercritical carbon dioxide |
| Publication Type | Journal Article |
| Year of Publication | 2011 |
| Authors | Dapurkar, SE, Kawanami, H, Chatterjee, M, Rode, CV, Yokoyama, T, Ikushima, Y |
| Journal | Applied Catalysis A-General |
| Volume | 394 |
| Issue | 1-2 |
| Pagination | 209-214 |
| Date Published | FEB |
| ISSN | 0926-860X |
| Keywords | Citral, Geraniol, heterogeneous catalyst, Molecular oxygen, Selective oxidation, Supercritical carbon dioxide |
| Abstract | Selective catalytic oxidation of geraniol to citral with molecular oxygen in supercritical carbon dioxide (scCO(2)) has been investigated. The catalyst used was a chromium containing mesoporous molecular sieve catalyst viz. CrMCM-41. Comparison studies were performed with CoMCM-41. PtMCM-41 and PdMCM-41 catalysts. Among the various catalysts studied. CrMCM-41 showed a high conversion of geraniol and an excellent selectivity for citral. In contrast CoMCM-41, PtMCM-41 and PdMCM-41 catalysts exhibited low conversion of geraniol. However all three catalysts compared showed similar citral selectivity to CrMCM-41. The effect of CO(2) pressure and reaction temperature geraniol oxidation was studied with CrMCM-41. Supercritical CO(2) medium was found to enhance the conversion of geraniol and/or yield of citral. It was noticed that the catalyst can be recycled with negligible loss of conversion. (C) 2011 Elsevier B.V. All rights reserved. |
| DOI | 10.1016/j.apcata.2011.01.001 |
| Type of Journal (Indian or Foreign) | Foreign |
| Impact Factor (IF) | 4.22 |