加拿大卡尔加里大学George K. H. Shimizu团队开发了可伸缩的金属有机框架作为二氧化碳捕获的持久的物理吸附剂。相关研究成果于2021年12月17日发表在国际顶尖学术期刊《科学》。

金属有机框架（MOFs）作为捕获二氧化碳（CO₂）的固体吸附剂，面临着在耐用、可伸缩材料中实现高效捕获和经济再生的挑战。锌基卡尔加里框架20（CALF-20）物理吸附二氧化碳的能力很高，但对水也有选择性。结构化CALF-20上的竞争性分离不仅显示了相对湿度低于40%时优先的CO₂物理吸附，而且还抑制了CO₂对水的吸附，其已通过计算建模得到证实。CALF-20具有低焓再生损失，并显示出对蒸汽（>450000次循环）和湿酸性气体的耐久性。它可以一步制备，形成复合材料，其合成可以扩大到批次几公斤。

附：英文原文

Title: A scalable metal-organic framework as a durable physisorbent for carbon dioxide capture

Author: Jian-Bin Lin, Tai T. T. Nguyen, Ramanathan Vaidhyanathan, Jake Burner, Jared M. Taylor, Hana Durekova, Farid Akhtar, Roger K. Mah, Omid Ghaffari-Nik, Stefan Marx, Nicholas Fylstra, Simon S. Iremonger, Karl W. Dawson, Partha Sarkar, Pierre Hovington, Arvind Rajendran, Tom K. Woo, George K. H. Shimizu

Issue&Volume: 2021-12-17

Abstract: Metal-organic frameworks (MOFs) as solid sorbents for carbon dioxide (CO2) capture face the challenge of merging efficient capture with economical regeneration in a durable, scalable material. Zinc-based Calgary Framework 20 (CALF-20) physisorbs CO2 with high capacity but is also selective over water. Competitive separations on structured CALF-20 show not just preferential CO2 physisorption below 40% relative humidity but also suppression of water sorption by CO2, which was corroborated by computational modeling. CALF-20 has a low enthalpic regeneration penalty and shows durability to steam (>450,000 cycles) and wet acid gases. It can be prepared in one step, formed as composite materials, and its synthesis can be scaled to multikilogram batches.

DOI: abi7281

Source: https://www.science.org/doi/10.1126/science.abi7281