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Water gas shift (WGS) reaction under medium temperature shift (MTS) conditions opens a new way to reduce CO content from dry methane reforming and to increase hydrogen productivity. This study aims to... synthesize the Cu/ZnO/ZSM-5 catalyst for WGS reaction with high feed concentrations of H2 and CO2. The reaction was carried out in a fixed bed reactor at atmospheric pressure, temperature 325 oC, and WHSV 60,000 ml/g-h using Cu/ZnO/ZSM-5 and Cu-based commercial catalyst. The Cu loading on the Cu/ZnO/ZSM-5 catalyst varied by 5, 10, and 15%-wt, while the commercial catalyst contained 58%-wt. According to the N2 physisorption, Cu/ZnO/ZSM-5 catalyst has a pore size around 2 nm. H2-TPR shows the increase in metal loading on the Cu/ZnO/ZSM-5 catalyst causes the reduction peak shift to a higher temperature. The catalyst of Cu/ZnO/ZSM-5 with a Cu content of 15% resulted in a CO conversion of 18%, a yield of H2 of 15%, and good stability for up to 8 hours. The presence of H₂ and CO₂ in the feed prevents the selectivity of the WGS reaction from reaching 100%. The increase in Cu metal loading increased the activity of the catalyst. The characterization was carried out to determine the physicochemical properties of the catalyst, namely, XRF, N2 physisorption, and H2-TPR.続きを見る
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Mendeley出力
p3299-3306