کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8095233 | 1522064 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of preparation conditions on the performance of simultaneous desulfurization and denitrification over SiO2-MnOx composites
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
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چکیده انگلیسی
SiO2-MnOx composites were prepared by sol-gel method and used to simultaneously desulfurization and denitrification. The effects of TEOS (tetraethoxysilane) concentration, H2O concentration and ammonia concentration on the performance of simultaneous desulfurization and denitrification over the SiO2-MnOx composites were investigated. The experiment results showed that all of the SiO2-MnOx composites with a desulfurization efficiency of up to 100% in the experiment, while the denitrification efficiency was decreased from nearly 100% with the increasing of time. The SiO2-MnOx composite which was synthesized with 0.054â¯mol TEOS, 1.111â¯mol H2O, and 0.208â¯mol ammonia (TEOS: ammonia: H2Oâ¯=â¯1.0: 3.9: 20.6) exhibited the best adsorption capacities of SO2 and NO, and the adsorption capacities of SO2 and NO were 0.0680â¯mmol/g and 0.1010mmoxl/g, respectively. The structure of the SiO2-MnOx composites, SiO2 distributed uniformly on the surface of MnOx, could reduce the adsorption inhibition of SO2 on NO, which was due to most of the SO2 could be adsorbed by the outer material (SiO2), while most of the NO molecules and the remaining SO2 enter into the inner layer and be adsorbed by MnOx. The urea treatment can increase the pore structure of the material by decomposing to produce NH3 and CO2, which made it easier for the gas to enter the material inside and improved the adsorption capacity of SO2 and NO. Based on the analysis of the TPD and FTIR spectra, it was apparent that the product of chemisorption was manganese nitrate, sulfuric acid and manganese sulfate.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Cleaner Production - Volume 189, 10 July 2018, Pages 627-634
Journal: Journal of Cleaner Production - Volume 189, 10 July 2018, Pages 627-634
نویسندگان
Honghong Yi, Kun Yang, Xiaolong Tang, Xiao Liu, Shunzheng Zhao, Fengyu Gao, Yonghai Huang, Zhongyu Yang, Jiangen Wang, Yiran Shi,