Jiangsu Key Laboratory of Fire Safety in Urban Underground Space, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China.
Jiangsu Key Laboratory of Fire Safety in Urban Underground Space, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China; State Key Laboratory of Coal Resources and Safe Mining China University of Mining and Technology, Jiangsu 221116, China; Key Laboratory of Gas and Fire Control for Coal Mines, China University of Mining and Technology, Ministry of Education, Xuzhou, Jiangsu 221116, China.
J Hazard Mater. 2021 Aug 5;415:125607. doi: 10.1016/j.jhazmat.2021.125607. Epub 2021 Mar 8.
In confined space fires, the large amount of CO generated by incomplete combustion of carbon-based materials poses a serious threat to the trapped people. However, the efficient method of removing CO in such disasters remains a great challenge. Herein, a spraying catalyst powder (SCP) approach is proposed for CO removal by oxidizing CO to harmless CO. Cu/Mn catalyst, synthesized by using ethylene glycol as solvent, was employed in this study. The influence of catalyst concentration, temperature, CO concentration and initial CO concentration on CO removal performance of SCP approach was investigated. With 500 g/m catalyst, 25,000 ppm CO could be reduced to 2550 ppm within 1 min and completely removed in less than 2.83 min at 200 °C. The feasibility of SCP approach in practical application was validated by the remarkable CO removal performance for charcoal combustion in confined tunnel. SCP approach could effectively reduce the CO concentration, which would reach up to 12,659 ppm in the absence of SCP approach, to less than 1500 ppm within 30 min. The experiment results suggest that SCP technology can effectively remove the fire-generated CO and is promising for practical application in crowded occupancies, such as underground space and aircraft compartment.
在有限空间火灾中，由于碳基材料不完全燃烧产生的大量 CO 对被困人员构成了严重威胁。然而，在这种灾难中，有效去除 CO 的方法仍然是一个巨大的挑战。本文提出了一种通过氧化 CO 为无害 CO 的喷涂催化剂粉末（SCP）方法来去除 CO。本研究采用乙二醇作为溶剂合成了 Cu/Mn 催化剂。考察了催化剂浓度、温度、CO 浓度和初始 CO 浓度对 SCP 法去除 CO 性能的影响。在 200°C 下，使用 500g/m 的催化剂，25000ppm 的 CO 可以在 1 分钟内降低到 2550ppm，并在不到 2.83 分钟内完全去除。通过对受限隧道内木炭燃烧的显著 CO 去除性能验证了 SCP 方法在实际应用中的可行性。SCP 方法可有效降低 CO 浓度，在没有 SCP 方法的情况下，CO 浓度可达 12659ppm 以上，30 分钟内可降至 1500ppm 以下。实验结果表明，SCP 技术可有效去除火灾产生的 CO，有望在地下空间和飞机舱等人员密集场所得到实际应用。
