eprintid: 1506924 rev_number: 30 eprint_status: archive userid: 608 dir: disk0/01/50/69/24 datestamp: 2016-07-31 04:05:01 lastmod: 2021-09-19 23:40:35 status_changed: 2016-11-29 14:47:49 type: article metadata_visibility: show creators_name: Wu, G creators_name: Brett, GL creators_name: Cao, E creators_name: Constantinou, A creators_name: Ellis, P creators_name: Kuhn, S creators_name: Hutchings, GJ creators_name: Bethell, D creators_name: Gavriilidis, A title: Oxidation of cinnamyl alcohol using bimetallic Au-Pd/TiO2 catalysts: a deactivation study in a continuous flow packed bed microreactor ispublished: pub divisions: UCL divisions: B04 divisions: C05 divisions: F43 keywords: Science & Technology, Physical Sciences, Chemistry, Physical, Chemistry, LIQUID-PHASE OXIDATION, SELECTIVE OXIDATION, AEROBIC OXIDATION, HETEROGENEOUS CATALYST, MOLECULAR-OXYGEN, PALLADIUM, PD, NANOPARTICLES, ALDEHYDES, SOLVENT note: This Open Access Article is licensed under a Creative Commons Attribution 3.0 Unported Licence abstract: The stability of a bimetallic Au–Pd/TiO2 catalyst was examined in a packed bed microreactor for the oxidation of cinnamyl alcohol dissolved in toluene. The catalyst was prepared by co-impregnation with a Au–Pd weight ratio of 1 : 19. Experiments were performed at 80–120 °C, oxygen concentration 0–100% and total pressure 4 bara. Principal products observed were cinnamaldehyde, 3-phenyl-1-propanol and trans-β-methylstyrene. Although the same catalyst was shown to possess good stability in the oxidation of benzyl alcohol, it deactivated during the oxidation of cinnamyl alcohol, particularly at elevated reaction temperatures. Higher concentration of oxygen used for the reaction led to improved cinnamaldehyde selectivity but lower conversion and higher deactivation rates. Treatment with hydrogen recovered only a fraction of the activity. Deactivation was attributed to Pd leaching and a complex effect of oxygen. date: 2016-05-26 date_type: published publisher: ROYAL SOC CHEMISTRY official_url: http://dx.doi.org/10.1039/c6cy00232c oa_status: green full_text_type: pub language: eng primo: open primo_central: open_green article_type_text: Article verified: verified_manual elements_id: 1142226 doi: 10.1039/c6cy00232c language_elements: English lyricists_name: Cao, Enhong lyricists_name: Gavriilidis, Asterios lyricists_name: Wu, Gaowei lyricists_id: ECAOX57 lyricists_id: AGAVR68 lyricists_id: GWUXX72 actors_name: Barczynska, Patrycja actors_id: PBARC91 actors_role: owner full_text_status: public publication: Catalysis Science & Technology volume: 6 number: 13 pagerange: 4749-4758 pages: 10 issn: 2044-4753 citation: Wu, G; Brett, GL; Cao, E; Constantinou, A; Ellis, P; Kuhn, S; Hutchings, GJ; ... Gavriilidis, A; + view all <#> Wu, G; Brett, GL; Cao, E; Constantinou, A; Ellis, P; Kuhn, S; Hutchings, GJ; Bethell, D; Gavriilidis, A; - view fewer <#> (2016) Oxidation of cinnamyl alcohol using bimetallic Au-Pd/TiO2 catalysts: a deactivation study in a continuous flow packed bed microreactor. Catalysis Science & Technology , 6 (13) pp. 4749-4758. 10.1039/c6cy00232c <https://doi.org/10.1039/c6cy00232c>. Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/1506924/1/c6cy00232c.pdf