Comparison of Noble Metal- and Copper-Based Catalysts for the Step of Methanol Steam Reforming in the Dimethyl Ether Steam Reforming Process

详细信息    查看全文

• 作者：Lide Oar-Arteta ; Aingeru Remiro ; Florence Epron ; Nicolas Bion ; Andrés T. Aguayo ; Javier Bilbao ; Ana G. Gayubo
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：March 30, 2016
• 年：2016
• 卷：55
• 期：12
• 页码：3546-3555
• 全文大小：618K
• ISSN：1520-5045

文摘

The kinetic behavior of noble metal catalysts (Pt and Rh supported on Al₂O₃/CeO₂ mixed oxides) and of Cu catalysts (conventional CuO–ZnO–Al₂O₃ (CZA) catalyst and CuFe₂O₄ spinel) has been compared in methanol steam reforming, which is the second step in the steam reforming of dimethyl ether (SRD). To ascertain the adequacy of these catalysts for use as metallic function in the bifunctional catalyst for SRD, the experiments have been performed in the 200–500 °C range, which are conditions of interest for this process. The reaction mechanisms differ between these catalyst families because the initial step is methanol dehydrogenation on noble metal catalysts and direct reforming on Cu catalysts. Nevertheless, the H₂ yield on CuFe₂O₄ spinel and Pt/CeO₂ catalysts is similar, 97% at 400 °C. This good behavior of the CuFe₂O₄ spinel as metallic function has also been proven in the SRD process on a CuFe₂O₄/γ-Al₂O₃ bifunctional catalyst. Therefore, bearing in mind its better performance and moderate cost, CuFe₂O₄ spinel is a suitable alternative to the conventional CZA catalyst in the preparation of bifunctional catalysts for SRD.