| Summary: | 碩士 === 崑山科技大學 === 機械工程研究所 === 101 === In this study, a burner combined with a methanol reformer of hydrogen production system was investigated. Methanol was burnt with various flow rates and air-fuel ratios in burner, and supplying energy to reformer. The SR (steam reforming) reformer was operated in different flow rates and S/C (Steam/methanol) ratios to produce hydrogen-rich gas, then air was introduced by different O2/CO ratios into the PrOX (Preferential oxidation) reactor for CO removal. When the methanol flow rate of burner is 3cc/min with air-fuel ratio of 6.5, burner temperature is up to 850oC. In this case, approximate 0.5kW of power was supplied to the reformer, which let the reformer reach the operating temperature in 8 min.
When reformer operating in S/C ratio of 0.7, 0.9, 1.1, 1.3, the highest hydrogen yield could reach about 114%, methanol conversion and thermal efficiency was 80% and 60% in S/C ratio of 1.1. In PrOX reactor, higher O2/CO ratio gave higher catalyst bed temperature. When catalyst bed temperature was higher than 180oC, H2 reacted with O2, so CO concentration began to rise. When O2/CO ratio is 1.0, the catalyst temperature was about 180oC; at this time, the CO concentration could be reduced to 0.5Vol.%, approximately.
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