AI Article Synopsis
- Copper-doped ZnO-ZrO solid solution catalysts were created using co-precipitation to enhance methanol synthesis from CO hydrogenation.
- Tests showed that the optimal copper content is 3%, which offers better dispersion and more active sites, improving CO conversion and methanol yield compared to higher copper levels.
- The 3% CuZnO-ZrO catalyst outperformed traditional CZA catalysts in selectivity and stability during the reaction at specific conditions.
Article Abstract
Copper-doped ZnO-ZrO solid solution catalysts were synthesized via co-precipitation for promoting CHOH synthesis via hydrogenation of CO. Various testing methods were applied to investigate the effect of various copper contents on the catalysts. The catalytic performance was evaluated by a fixed bed reactor. XRD, HRTEM and Raman spectra collectively indicated that a ZnO-ZrO solid solution catalyst with 3% Cu had a higher Cu dispersion, while the H-TPR results confirmed that a catalyst with 3% Cu had more Cu active sites under low temperature H pretreatment. When the copper content increased to 5% and 10%, the catalyst showed a better Cu crystallinity and a worse Cu dispersion, which could have a negative effect. Therefore, the CO conversion and methanol yield with a 3% CuZnO-ZrO catalyst at 5 MPa, 250°C and 12 000 ml/(g h) increased by 8.6% and 7.6%, respectively. Moreover, the CHOH selectivity and catalytic stability of the solid solution catalyst were better than those of the traditional CZA catalyst.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10265016 | PMC |
| http://dx.doi.org/10.1098/rsos.221213 | DOI Listing |
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