University of Seville , Avenida Reina Mercedes s/n, 41012 Seville, Spain.
Environ Sci Technol. 2013 Aug 20;47(16):9538-44. doi: 10.1021/es4019173. Epub 2013 Aug 7.
The Ca-Looping (CaL) process, based on the multicyclic carbonation/calcination of CaO at high temperatures, is a viable technology to achieve high CO2 capture efficiencies in both precombustion and postcombustion applications. In this paper we show an experimental study on the multicyclic CO2 capture of a natural limestone in a fixed bed at CaL conditions as affected by the application of a high-intensity acoustic field. Our results indicate that sound promotes the efficiency of CO2 sorption in the fast carbonation phase by enhancing the gas-solids mass transfer. The fundamentals of the physical mechanism responsible for this effect (acoustic streaming) as well as the technical feasibility of the proposed technique allows envisaging that sonoprocessing will be beneficial to enhance multicyclic CO2 capture in large-scale applications.
基于 CaO 在高温下的多循环碳酸化/煅烧的 Ca-Looping（CaL）工艺是一种可行的技术，可以在预燃烧和后燃烧应用中实现高 CO2 捕获效率。在本文中，我们展示了在 CaL 条件下固定床中天然石灰石的多循环 CO2 捕获的实验研究，该实验受高强度声场的影响。我们的结果表明，声音通过增强气固传质来促进快速碳酸化阶段中 CO2 吸附的效率。负责这种效果的物理机制（声流）的基础以及所提出技术的技术可行性使得可以设想超声处理将有利于提高大规模应用中的多循环 CO2 捕获。
