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Effect of promoter SiO2, TiO2 or SiO2-TiO2 on the performance of CuO-ZnO-Al2O3 catalyst for methanol synthesis from CO2 hydrogenation

Paper ID Volume ID Publish Year Pages File Format Full-Text
41147 45878 2012 6 PDF Available
Title
Effect of promoter SiO2, TiO2 or SiO2-TiO2 on the performance of CuO-ZnO-Al2O3 catalyst for methanol synthesis from CO2 hydrogenation
Abstract

The influences of SiO2, TiO2 or SiO2-TiO2 promoters on the catalytic performance of CuO-ZnO-Al2O3 catalyst in the methanol synthesis from CO2 hydrogenation were studied. The catalysts were prepared by co-precipitation method, SiO2 and TiO2 were loaded by hydrolyzation of tetraethyl orthosilicate (TEOS) and hydrolyzation of tetra-n-butyl titanate (C16H36O4Ti), respectively. The catalytic performances of the prepared catalysts were investigated under conditions of T = 533 K, P = 2.6 MPa, H2:CO2 = 3:1 (volume ratio) and SV = 3600 h−1. The experimental results showed that the promoted catalysts showed a higher performance than CuO-ZnO-Al2O3. Especially, the one promoted with SiO2-TiO2 maximized both activity and methanol selectivity with 40.70% in CO2 conversion and 41.17% in methanol selectivity as compared to the one without promoter (15.81% in CO2 conversion and 23.31% in methanol selectivity). Characterizations of XRD, H2-TPR, H2-TPD, NH3-TPD, CO2-TPD and SEM revealed that all the promoters improved the CuO dispersion in the catalyst body and improved the adsorption/activation of H2 on the catalyst. Especially SiO2-TiO2 exhibited higher performance as compared to SiO2 or TiO2.

Graphical abstractFigure optionsDownload full-size imageDownload high-quality image (84 K)Download as PowerPoint slideHighlights► Promoter SiO2-TiO2 showed a higher performance than SiO2, TiO2 or without promoter. ► The CO2 conversion (40.70%) over the SiO2-TiO2 promoted catalyst is very high. ► SiO2-TiO2 was hardly used in the catalyst as a promoter.

Keywords
Promoter; TiO2; SiO2; CO2; Hydrogenation; Methanol
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Effect of promoter SiO2, TiO2 or SiO2-TiO2 on the performance of CuO-ZnO-Al2O3 catalyst for methanol synthesis from CO2 hydrogenation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volumes 415–416, 16 February 2012, Pages 118–123
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us