DeNOx mechanism of iron-manganese ore catalysts at low temperatures

IF 2.2 4区 工程技术 Q3 ENGINEERING, CHEMICAL
Canadian Journal of Chemical Engineering Pub Date : 2026-08-06 Epub Date: 2026-03-30 DOI:10.1002/cjce.70372
Qian Zhang, Xianhang Sun, Yun Xu, Fahua Zhu, Jun Liu, Ke Zhuang, Yunlan Sun
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引用次数: 0

Abstract

Nitrogen oxides (NOx) are primary pollutants that pose threats to both the human health and the environment. Among the various methods for mitigating NOx emissions, selective catalytic reduction (NH3-SCR) is as a widespread and effective method. However, traditional catalysts such as vanadium-titanium catalysts face challenges in meeting the requirements to remove NOx at low temperature. In this study, iron-manganese ore that is widely available and inexpensive was used as deNOx catalyst in flue gas at low temperatures, which exhibits outstanding low-temperature SCR deNOx performance, achieving nearly 100% deNOx efficiency within the temperature range of 80–180°C. The optimal preparation and operating parameters of the iron-manganese ore were determined and its deNOx mechanism were revealed iron-manganese ore via experiments and density functional theory calculation.

铁锰矿石催化剂低温脱氧机理研究
氮氧化物(NOx)是对人类健康和环境构成威胁的主要污染物。在各种减少NOx排放的方法中,选择性催化还原(NH3-SCR)是一种广泛而有效的方法。然而,钒钛催化剂等传统催化剂在满足低温脱硝要求方面面临挑战。在本研究中,使用广泛可用且价格低廉的铁锰矿作为低温烟气脱硝催化剂,表现出优异的低温SCR脱硝性能,在80-180℃的温度范围内,脱硝效率接近100%。通过实验和密度泛函理论计算,确定了铁锰矿石的最佳制备工艺和操作参数,揭示了铁锰矿石脱氧机理。
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来源期刊
Canadian Journal of Chemical Engineering
Canadian Journal of Chemical Engineering 工程技术-工程:化工
CiteScore
3.60
自引率
14.30%
发文量
448
审稿时长
3.2 months
期刊介绍: The Canadian Journal of Chemical Engineering (CJChE) publishes original research articles, new theoretical interpretation or experimental findings and critical reviews in the science or industrial practice of chemical and biochemical processes. Preference is given to papers having a clearly indicated scope and applicability in any of the following areas: Fluid mechanics, heat and mass transfer, multiphase flows, separations processes, thermodynamics, process systems engineering, reactors and reaction kinetics, catalysis, interfacial phenomena, electrochemical phenomena, bioengineering, minerals processing and natural products and environmental and energy engineering. Papers that merely describe or present a conventional or routine analysis of existing processes will not be considered.
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