Abstract
This paper demonstrates the benefit of using a ternary Cu–Cr–Al system as a support for palladium catalysts in the methanol synthesis reaction (MS) obtained from CO hydrogenation. The influence of ternary oxide composition and palladium addition on the physicochemical and catalytic properties of Pd/Cu–Cr–Al catalysts in methanol synthesis is discussed. The physicochemical properties of the studied systems were examined by XRD, TPR and BET methods. The promotion effect of palladium on the catalytic activity and reduction of ternary oxide was proven. It was found that palladium promoted catalysts prepared from palladium nitrate precursor showed higher yield in methanol formation.
Highlights
This paper demonstrates the benefit of using a ternary Cu–Cr–Al system as a support for palladium catalysts in the methanol synthesis reaction (MS) obtained from CO hydrogenation
The spinel structure CuCr2O4, CuAl2O4 crystal phases formed during the calcination process carried out at 700 and 900 °C are all characterized by a low value of specific surface area what explain the observed results
The activity result showed that the most promising systems are palladium supported catalysts Pd/Cu–Cr–Al synthesized by the impregnation method using palladium nitrate solution as a precursor
Summary
This paper demonstrates the benefit of using a ternary Cu–Cr–Al system as a support for palladium catalysts in the methanol synthesis reaction (MS) obtained from CO hydrogenation. The influence of ternary oxide composition and palladium addition on the physicochemical and catalytic properties of Pd/Cu–Cr–Al catalysts in methanol synthesis is discussed. The promotion effect of palladium on the catalytic activity and reduction of ternary oxide was proven. Methanol is obtained from syngas at the temperature range 200– 250 °C under the pressure of 0.5–10 MPa, according to the following reactions: CO2 þ 3H2 $ CH3OH þ H2ODH 1⁄4 À49:53 kJ/mol. Copper based catalysts are commonly used in many chemical reactions such as the water gas shift reaction (WGS), methanol steam reforming, methanol decomposition or NO reduction. Catalytic systems based on copper oxide are characterized with high selectivity in methanol formation [8, 9]. The improvement of copper catalyst stability is achieved by the modification of CuO by Cr2O3 addition [9]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
