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Structural Effects of HCl Adsorption on Mg–Fe Hydrotalcite-like Oxides at 350–650 °C in Flue Gas
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-10-26 , DOI: 10.1021/acs.iecr.8b02999 Jun Cao 1 , Tianyu Chen 1 , Baosheng Jin 1 , Yaji Huang 1 , Chunhong Hu 1
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2018-10-26 , DOI: 10.1021/acs.iecr.8b02999 Jun Cao 1 , Tianyu Chen 1 , Baosheng Jin 1 , Yaji Huang 1 , Chunhong Hu 1
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Calcined Mg–Fe hydrotalcite-like compounds (HTLs), hydrotalcite-like oxides (HTOs), have shown potential performance for removing hydrochloric acid (HCl) from flue gas at medium-high temperatures. The adsorption of HCl on Mg–Fe HTOs was studied from 350 to 650 °C. The average removal efficiency of HCl on Mg–Fe HTOs is affected primarily by temperature-dependent structural changes. Structural changes in pristine and calcined HTL samples were characterized using various analytical techniques. The pyrolysis kinetics of Mg–Fe HTLs were also studied using Kissinger–Akahira–Sunose and Flynn–Wall–Ozawa methods at temperatures ranging from room temperature to 700 °C. The layered structure of HTLs was maintained at 255 °C, where the activation energy of decomposition was approximately 35–38 kJ·mol–1. At 350 °C, the removal efficiency of HCl adsorption on the HTOs was as high as 92.4%. Upon heating to 495 °C, the activation energy was 65–70 kJ·mol–1, and the HTL structure was destroyed by the decomposition of carbonate and hydroxyl functional groups, resulting in a slight decrease in HCl adsorption capacity but still exceeding 90%.
中文翻译：
HCl在350–650°C烟气中吸附Mg-Fe水滑石样氧化物的结构效应
煅烧的Mg-Fe类水滑石化合物（HTL），类水滑石氧化物（HTO）在中高温下显示出从烟气中去除盐酸（HCl）的潜在性能。研究了在350至650°C下HCl在Mg-Fe HTOs上的吸附。HCl在Mg-Fe HTOs上的平均去除效率主要受温度依赖性结构变化的影响。使用各种分析技术表征原始和煅烧的HTL样品的结构变化。还使用了Kissinger-Akahira-Sunose和Flynn-Wall-Ozawa方法在从室温到700°C的温度下研究了Mg-Fe HTL的热解动力学。HTL的分层结构保持在255°C，分解的活化能约为35–38 kJ·mol –1。在350°C下，HTO上HCl吸附的去除效率高达92.4％。加热至495°C时，活化能为65–70 kJ·mol –1，HTL结构被碳酸盐和羟基官能团的分解破坏，导致HCl吸附容量略有下降，但仍超过90％ 。
更新日期：2018-10-26
中文翻译：
HCl在350–650°C烟气中吸附Mg-Fe水滑石样氧化物的结构效应
煅烧的Mg-Fe类水滑石化合物（HTL），类水滑石氧化物（HTO）在中高温下显示出从烟气中去除盐酸（HCl）的潜在性能。研究了在350至650°C下HCl在Mg-Fe HTOs上的吸附。HCl在Mg-Fe HTOs上的平均去除效率主要受温度依赖性结构变化的影响。使用各种分析技术表征原始和煅烧的HTL样品的结构变化。还使用了Kissinger-Akahira-Sunose和Flynn-Wall-Ozawa方法在从室温到700°C的温度下研究了Mg-Fe HTL的热解动力学。HTL的分层结构保持在255°C，分解的活化能约为35–38 kJ·mol –1。在350°C下，HTO上HCl吸附的去除效率高达92.4％。加热至495°C时，活化能为65–70 kJ·mol –1，HTL结构被碳酸盐和羟基官能团的分解破坏，导致HCl吸附容量略有下降，但仍超过90％ 。
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