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Fe^ⅡEDTA络合-Na2SO3还原吸收NO性能 被引量:7
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作者 张先龙 孟凡跃 +2 位作者 吴琼 吴雪平 郭亚晴 《环境科学研究》 EI CAS CSSCI CSCD 北大核心 2016年第12期1847-1856,共10页
为研究Fe^ⅡEDTA络合-Na2SO3还原吸收NO性能,对制备参数〔pH、V(Fe^ⅡEDTA)(Fe^ⅡEDTA溶液用量)、初始c(Fe^ⅡEDTA)、n(Fe^Ⅱ)∶n(EDTA)〕和操作条件〔温度、φ(O2)、烟气流量、入口ρ(NO)〕及SO32-〔以c(Na2SO3)计〕... 为研究Fe^ⅡEDTA络合-Na2SO3还原吸收NO性能,对制备参数〔pH、V(Fe^ⅡEDTA)(Fe^ⅡEDTA溶液用量)、初始c(Fe^ⅡEDTA)、n(Fe^Ⅱ)∶n(EDTA)〕和操作条件〔温度、φ(O2)、烟气流量、入口ρ(NO)〕及SO32-〔以c(Na2SO3)计〕进行了考察,并采用FT-IR(傅里叶红外光谱仪)和Raman(拉曼光谱仪)等表征手段对吸收体系进行表征.结果表明:1pH和初始c(Fe^ⅡEDTA)对NO络合吸收量影响较显著,V(Fe^ⅡEDTA)和n(Fe^Ⅱ)∶n(EDTA)次之.在pH为3^9的范围内,NO络合吸收量先增加后降低,pH为7时达到最大(0.502 mol/mol);初始c(Fe^ⅡEDTA)由0.005 mol/L增至0.025 mol/L,NO络合吸收量随之增加了0.198 mol/mol.2温度和φ(O2)的升高不利于NO吸收,当温度由30℃升至60℃、φ(O2)从0%增至6%,NO络合吸收量却分别降低了71.69%、63.3%;此外,烟气流量和入口ρ(NO)的增加对NO络合吸收量也无显著影响.3SO32-的存在显著提高了Fe^ⅡEDTA高效络合NO吸收时间.结合试验结果确定最佳反应条件:pH为7、V(Fe^ⅡEDTA)为550 m L、初始c(Fe^ⅡEDTA)为0.020 mol/L、n(Fe^Ⅱ)∶n(EDTA)为1∶1.0、温度为30℃、烟气流量为900 m L/min、无氧、c(Na2SO3)为0.20 mol/L,此时,NO络合吸收量为1.099 mol/mol,NO最大脱除率达到96.98%.研究显示,溶液中n(Fe^ⅡEDTA)∶n(NO)对络合吸收NO起到主导作用,同时SO32-对Fe^ⅡEDTA(NO)还原作用是促进NO吸收的重要机制. 展开更多
关键词 NO还原 FeⅡEDTA SO32- 络合吸收量 脱除率
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Synthesis of flowerlike nickel particles and their microwave absorbing properties 被引量:3
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作者 齐海萍 曹海琳 黄玉东 《Journal of Central South University》 SCIE EI CAS 2014年第8期3007-3012,共6页
Two kinds of nickel particles with flower-like struc~'es assembled with a number of nano-flakes were synthesized and the relationship of their morphology and microwave absorbing properties was studied. The electromag... Two kinds of nickel particles with flower-like struc~'es assembled with a number of nano-flakes were synthesized and the relationship of their morphology and microwave absorbing properties was studied. The electromagnetic parameters of these flower-like Ni were measured with vector network analyzer at 2-18 GHz frequency and the reflection losses (RL) with different sample thicknesses were calculated. The results indicate that the flower-like nickel-wax composites with the sample thickness less than 2 mm show excellent absorbing ability. This result is expected to play a guiding role in the preparation of the highly efficient absorber. 展开更多
关键词 NICKEL FLOWER-LIKE microwave absorbing properties
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