碳达峰和碳中和目标的提出为我国碳减排发展明确了方向，也对碳捕集技术未来发展提出了新要求。空气中直接捕集CO2作为新兴负碳排放技术是实现双碳目标的重要技术保障。专利作为技术信息的有效载体，是分析技术发展的重要工具，具有信息丰富完备、覆盖时间长、真实可靠等特征，更是学术期刊资源的重要补充。以直接空气捕集相关关键词进行检索，并基于国内外专利文献分析了空气中直接捕集CO2技术的发展历程，分析了空气直接捕集技术的专利申请数量，介绍了主要技术形式与改进措施。着重介绍了主要研究创新主体的关键专利技术，包括低成本高效吸附剂的改进，降低空气流通装置阻力的方法以及空气直接捕集系统与其他化学系统的耦合等。随着技术发展带来的降本增效以及碳交易市场与碳关税的建立形成，具有负碳潜力的空气直接捕集CO2技术将会得到更广泛关注。最后对我国空气直接捕集CO2技术未来发展方向进行展望。

The proposal of carbon peak and carbon neutrality goals has provided a clear direction for reducing carbon emissions in China and set new standards for the advancement of carbon capture technology. Direct air capture (DAC) of carbon dioxide, a novel negative emissions technology, is crucial for achieving the carbon peak and carbon neutrality goals and has garnered significant attention. As an effective carrier of technological information, patent is an important tool for analyzing technological development. It have the characteristics of rich and complete information, long coverage time, authenticity and reliability, and is an important supplement to academic journal resources. The relevant keywords of direct air capture were searched, and based on domestic and foreign patent documents, the development process of direct capture CO2 technology in the air was analyzed, the number of patent applications for direct air capture technology,the main technical forms and improvement measures were analyzed. The key patented technologies of the main research innovation subjects are highlighted, including the improvement of low-cost and high-efficiency adsorbents, the method of reducing the resistance of air circulation devices, and the coupling of direct air capture systems with other chemical systems. With the cost reduction and efficiency increase brought about by the development of technology, and the establishment of carbon trading market and carbon tariff, the air direct capture CO2 technology with negative carbon potential will receive more extensive attention. Finally, the future development direction of air direct capture CO2 technology in China was prospected.

0 引言

1 DAC专利申请趋势与技术概述

2 国外企业院所研发现状

   2.1 液体DAC

   2.2 固体DAC

3 国内企业院所研发现状

4 结语及展望