Noted:
General fund of KMUTNB for academic year of 2013.
Abstract:
Methanol production from synthesis gas was experimented in 0.025 m3 semi-batch reactor (Parr reactor model 4848) over Copper/Zinc Oxide/Alumina catalyst (Cu/ZnO/Al2O3). From previous research, operating temperature at 280 ºC and pressure under 40 bars was found optimal, for the reaction. The catalyst was prepared by 2-step surfactant assisted-precipitation method using polyethylene glycol, PEG 6000 which helps reducing Cu crystal and increasing the catalysts surface area. 14.14 nm crystalline size was measured with 99.67 m2/g of surface area. 5 g of catalyst was found to give highest amount of methanol production, 607.53 , after 24 hours of reaction of hydrogen and carbon monoxide at ratio of 2 to 1. CO conversion and methanol selectivity were 38.26 and 93.11%, respectively. when 1 to 2 ratio of hydrogen to carbon dioxide was used, the methanol production was dropped to 388.11 after 12 hours of reaction giving 38.53% of CO conversion and 90.77% of methanol selectivity.