集成的二氧化碳捕集与还原催化：γ-Al2O3载体的作用、钾的
独特状态以及与铜的协同作用
Integrated CO2 capture and reduction catalysis: Role of γ-Al2O3 support, unique state of potassium and synergy with copper
Donato Pinto, Stefano Minorello, Zhouping Zhou, Atsushi Urakawa*
https://doi.org/10.1016/j.jes.2023.06.006
Abstract
Carbon dioxide capture and reduction (CCR) process emerges as an efficient catalytic strategy for CO2 capture and conversion to valuable chemicals. K-promoted Cu/Al2O3 catalysts exhibited promising CO2 capture efficiency and highly selective conversion to syngas (CO + H2). The dynamic nature of the Cu-K system at reaction conditions complicates the identification of the catalytically active phase and surface sites. The present work aims at more precise understanding of the roles of the potassium and copper and the contribution of the metal oxide support. While γ-Al2O3 guarantees high dispersion and destabilisation of the potassium phase, potassium and copper act synergistically to remove CO2 from diluted streams and promote fast regeneration of the active phase for CO2 capture releasing CO while passing H2. A temperature of 350℃ is found necessary to activate H2 dissociation and generate the active sites for CO2 capture. The effects of synthesis parameters on the CCR activity are also described by combination of ex-situ characterisation of the materials and catalytic testing.
通讯作者
Prof. Atsushi Urakawa obtained his BSc in Applied Chemistry at Kyushu University (Japan), with a one-year stay in the USA. He then moved to Europe and studied Chemical Engineering at TU Delft for his MSc. He obtained his PhD in 2006 at ETH Zurich (Switzerland). He worked as a Senior Scientist and Lecturer at ETH Zurich before joining ICIQ (Spain) in 2010 as Group Leader. In 2019, he undertook a new challenge as a Professor of Catalysis Engineering at ChemE, TU Delft (The Netherlands). His group develops novel heterogeneous catalysts and catalytic processes aimed at minimizing energy usage and reducing negative impacts on the environment and human health. They employ a multidisciplinary approach, integrating material science, reaction engineering, and in situ/operando methodologies to gain a thorough understanding of active sites and transformation pathways. The primary target reactions include CO2 conversion to valuable chemicals, methane activation, environmental catalysis (NOx abatement), and hydrogen production through electro- and photocatalytic activation. He was elected a Fellow of the Royal Society of Chemistry (FRSC) in 2016 and was the recipient of the JSPS Prize in 2020 and The Japan Academy Medal in 2021.
原文链接
https://www.sciencedirect.com/science/article/pii/S1001074223002632
引用格式
Donato Pinto, Stefano Minorello, Zhouping Zhou, Atsushi Urakawa, 2024. Integrated CO2 capture and reduction catalysis: Role of γ-Al2O3 support, unique state of potassium and synergy with copper. J. Environ. Sci. 140, 113-122.
