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Conversion of methyl methacrylate to methyl isobutyrate via hydrogenation over Ni/zeolites catalysts |
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| รหัสดีโอไอ | |
| Creator | 1. Ramzi Saif 2. Surachet Hongkailers 3. Napida Hinchiranan |
| Title | Conversion of methyl methacrylate to methyl isobutyrate via hydrogenation over Ni/zeolites catalysts |
| Publisher | Faculty of Engineering, Khon Kaen University |
| Publication Year | 2567 |
| Journal Title | Engineering and Applied Science Research |
| Journal Vol. | 51 |
| Journal No. | 2 |
| Page no. | 141-151 |
| Keyword | Hydrogenation, Methyl isobutyrate, Methyl methacrylate, Catalyst |
| URL Website | https://ph01.tci-thaijo.org/index.php/easr/index |
| Website title | Engineering and Applied Science Research |
| ISSN | 2539-6161 |
| Abstract | According to the zero waste and upcycling policy, this work aims to utilize waste polymethyl methacrylate (PMMA) by its conversion to methyl isobutyrate (MIB) via hydrogenation over nickel (Ni) based catalysts supported on the commercial zeolites: HY, H-Beta-27 (SiO2/Al2O3 mol ratio = 27), H-Beta-40 (SiO2/Al2O3 mol ratio = 40), and H-ZSM-5. The appropriate catalyst support was first screened by using MMA monomer as the substrate for hydrogenation. Under 30 bar initial hydrogen pressure (PH2) at 250 °C for 3 h, the Ni/H-beta-27 catalyst effectively promoted hydrogenation to achieve an 85% MMA conversion level with a 56.2 wt% MIB yield because of its larger external surface area and pore size. A higher initial PH2 (40 bar) and longer reaction time (5 h) improved the MIB yield up to 84.6 wt%. For hydrogenation of the MMA portion in a pyrolysis liquid product derived from waste PMMA, a MMA conversion level of 99.7% was achieved when hydrogenation was operated under 30 bar initial PH2 and 250 oC for 5 h. However, only a 36.3 wt% MIB yield was obtained with a noticeable formation of coupling and cyclic compounds at 42 wt% and 18 wt%, respectively. The enhancement of the initial PH2 to 40 bar overcame this problem and increased the MIB yield to 47.6 wt%. |
