Title: CO2 hydrogenation to CH3OH over PdZn catalysts, with reduced CH4 production - data

Citation
Ruiz Esquius J, Bahruji H, Taylor SH, et al. (2020). CO2 hydrogenation to CH3OH over PdZn catalysts, with reduced CH4 production - data. Cardiff University. http://doi.org/10.17035/d.2020.0116381908


Access Rights: Data is provided under a Creative Commons Attribution (CC BY 4.0) licence
Access Method: Click to email a request for this data to opendata@cardiff.ac.uk

Dataset Details
Publisher: Cardiff University
Date (year) of data becoming publicly available: 2020
Data format: .xlsx
Software Required: excel
Estimated total storage size of dataset: Less than 1 gigabyte
Number of Files In Dataset: 1
DOI: 10.17035/d.2020.0116381908

Description

Abstract: Metallic Pd, under CO2 hydrogenation conditions (> 175 °C, 20 bar in this work), promotes CO formation via the reverse water gas shift (RWGS) reaction. Pd-based catalysts can show high selectivity to methanol when alloyed with Zn, and PdZn alloy catalysts are commonly reported as a stable alternative to Cu-based catalysts for the CO2 hydrogenation to methanol. The production of CH4 is sometimes reported as a minor by-product, but nevertheless this can be a major detriment for an industrial process, because methane builds up in the recycle loop, and hence would have to be purged periodically. Thus, it is extremely important to reduce methane production for future green methanol synthesis processes. In this work we have investigated TiO2 as a support for such catalysts, with Pd, or PdZn deposited by chemical vapour impregnation (CVI). Although titania-supported PdZn materials show excellent performance, with high selectivity to CH3OH + CO, they suffer from methane formation (> 0.01 %). However, when ZnTiO3 is used instead as a support medium for the PdZn alloy, methane production is greatly suppressed. The site for methane production appears to be the TiO2, which reduces methanol to methane at anion vacancy sites.

This data set contains an excel file with the catalyst characterisation (XRD for supports, annealed and reduced samples, in situ XRD reduction for Pd/ZnO; XPS for Pd(3d), Zn(2p) and Zn(LM2); BET surface area; TEM images and particle count; CO2 hydrogenation data including CO2 conversion, product selectivity and productivity).

Research results based upon these data are published at https://doi.org/10.1002/cctc.202000974



Keywords

CO2 hydrogenation, Methanol synthesis

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Last updated on 2020-30-09 at 09:26