共查询到20条相似文献,搜索用时 15 毫秒
1.
近几年来,以氢键受体(HBA)和氢键供体(HBD)组成的低共熔溶剂(DESs)以其类似于离子液体的性质被认为是一种有潜力的SO2吸附剂。为制备用于低压SO2吸收的容量大、价格合理、循环性能好的低共熔溶剂,选用咪唑(Im)作为功能化组分,以价格低廉的甘油(Gly)、PEG200和乙二醇(EG)作为第二HBD,与作为HBA的氯化胆碱(CC)构建CC-GIy-Im、CC-PEG200-Im、CC-EG-Im三元功能化低共熔溶剂,并用于低压SO2的捕集实验研究。着重考察了第二HBD种类、咪唑含量、温度等因素对DESs吸收SO2的性能影响。结果表明:在所选的第二HBD中,PEG200的性能最佳,其构建的低共熔溶剂密度、黏度适中,热稳定性好,吸收性好;CC-PEG200-Im(1∶2∶7)在40℃下,对1% SO2的吸收量达到0.236 g SO2/g DES;经5次吸收-解吸循环后,低共熔溶剂吸收性能仍然稳定;1H NMR谱图分析结果表明,CC-PEG200-Im对SO2的吸收机理为化学吸收。 相似文献
2.
乙二胺/磷酸溶液吸收SO2的实验研究 总被引:1,自引:0,他引:1
通过实验研究了乙二胺/磷酸溶液在填料塔中的脱硫性能。考察了吸收液在不同的液气比、温度、pH值、浓度、SO2含量下的脱硫率,从而确立了适宜的工艺操作条件。适宜的操作条件为:液气比L/G=0 6~1 0,乙二胺浓度为0 3mol/L左右,pH值=6 0~7 5,吸收温度为4060℃,吸收液入口SO2质量浓度为6~8g/L。 相似文献
3.
烟气脱硫技术研究进展 总被引:19,自引:0,他引:19
总结了近年来国内外应用的几种主要脱硫工艺和正在研究开发的新脱硫工艺。对其中发生的化学反应、技术特点及存在的问题进行了详细的分析,并从技术、经济分析角度评估各种工艺,提出适合我国燃煤电厂情况的脱硫方案。 相似文献
4.
燃煤电厂烟气脱硫技术进展 总被引:1,自引:0,他引:1
综述了近年来国内外几种主要的烟气脱硫技术和目前正在研究开发的新工艺,简要的介绍了其原理,技术特点和存在的问题;并从技术、经济角度对几种常用的脱硫工艺进行分析与总结,对未来做出了展望。 相似文献
5.
CO2对石灰石脱硫剂的活化作用 总被引:1,自引:0,他引:1
在间歇式鼓泡反应器的烟气脱硫实验装置中,研究了CO2气体活化处理对石灰石脱硫剂浆液烟气脱硫效率的影响. 依据脱硫过程中石灰石脱硫剂浆液pH值随脱硫反应时间的变化规律,初步分析了CO2对石灰石脱硫剂的活化作用及活化后石灰石脱硫剂的烟气脱硫过程机理. 结果表明,CO2气体的活化处理促进了石灰石在水溶液中的溶解,进而改善了石灰石脱硫剂浆液的烟气脱硫反应活性,使处理后的石灰石脱硫剂浆液的烟气脱硫效率和脱硫剂的利用率提高. 基于流化床反应器连续过程的实验结果,证实了CO2对石灰石脱硫剂的活化作用. 为提高石灰石在烟气脱硫中的反应活性提供了一种新的工艺,可用于烟气脱硫中对石灰石脱硫剂浆液的活化. 相似文献
6.
7.
8.
烟气中二氧化硫测定方法的研究 总被引:1,自引:0,他引:1
对烟气中二氧化硫的测定方法进行了改进,采用TH-880IV微电脑烟尘平行采样仪代替碘量法,对脱硫塔进出口烟气中二氧化硫进行测定,测定值相对误差为1.2%。 相似文献
9.
Yongkang Cao Xiangping Zhang Shaojuan Zeng Yanrong Liu Haifeng Dong Chun Deng 《American Institute of Chemical Engineers》2020,66(8):e16253
The emerging of ionic liquids (ILs) provides an efficient and sustainable way to separate and recover NH3 due to their unique properties. However, the solid or highly viscous ILs are not suitable for traditional scrubbing. Therefore, an effective strategy was proposed by combining the protic ILs (PILs) with acidic H and low viscous ethylene glycol (EG) to form IL-based deep eutectic solvents (DESs) for NH3 absorption. The results indicated that these PIL-based DESs not only have fast absorption rate, but also exhibit exceptional NH3 capacity and excellent recyclability. The highest mass capacity of 211 mg NH3/g DES was achieved by [Im][NO3]/EG with molar ratio of 1:3, and was higher than all the reported ILs and IL-based DESs, which was originated from multiple hydrogen bonding between acidic H and hydroxyl groups of the DESs and NH3. This work will provide useful idea for designing IL-based solvents for NH3 separation applications. 相似文献
10.
三元铁基离子液体-乙醇-水体系的湿法烟气脱硫性能研究(英文) 总被引:1,自引:0,他引:1
Fe-based ionic liquid(Fe-IL) was synthesized by mixing FeCl3?6H2O and 1-butyl-3-methylimidazolium chloride [Bmim]Cl in this paper.The phase diagram of a ternary Fe-IL,ethanol and water system was investigated to construct a ternary desulfurization solution for wet flue gas desulfurization.The effects of flow rate and concen-tration of SO2,reaction temperature,pH and Fe-IL fraction in aqueous desulfurization solution on the desulfuriza-tion efficiency were investigated.The results shows that the best composition of ternary desulfurization solution of Fe-IL,ethanol and water is 1︰1.5︰3 by volume ratio,and pH should be controlled at 2.0.Under such conditions,a desulfurization rate greater than 90% could be obtained.The product of sulfuric acid had inhibition effect on the wet desulfurization process.With applying this new ternary desulfurization solution,not only the catalyst Fe-IL can be recycled and reused,but also the product sulfuric acid can be separated directly from the ternary desulfurization system. 相似文献
11.
《中国化学工程学报》2012,20(1)
Fe-based ionic liquid(Fe-IL) was synthesized by mixing FeCl3·6H2O and 1-butyl-3-methylimidazolium chloride [Bmim]Cl in this paper.The phase diagram of a ternary Fe-IL,ethanol and water system was investigated to construct a ternary desulfurization solution for wet flue gas desulfurization.The effects of flow rate and concentration of SO2,reaction temperature,pH and Fe-IL fraction in aqueous desulfurization solution on the desulfurization efficiency were investigated.The results shows that the best composition of ternary desulfurization solution of Fe-IL,ethanol and water is 1:1.5:3 by volume ratio,and pH should be controlled at 2.0.Under such conditions,a desulfurization rate greater than 90% could be obtained.The product of sulfuric acid had inhibition effect on the wet desulfurization process.With applying this new ternary desulfurization solution,not only the catalyst Fe-IL can be recycled and reused,but also the product sulfuric acid can be separated directly from the ternary desulfurization system. 相似文献
12.
《中国化学工程学报》2012,20(1)
Fe-based ionic liquid(Fe-IL) was synthesized by mixing FeCl3·6H2O and 1-butyl-3-methylimidazolium chloride [Bmim]Cl in this paper.The phase diagram of a ternary Fe-IL,ethanol and water system was investigated to construct a ternary desulfurization solution for wet flue gas desulfurization.The effects of flow rate and concentration of SO2,reaction temperature,pH and Fe-IL fraction in aqueous desulfurization solution on the desulfurization efficiency were investigated.The results shows that the best composition of ternary desulfurization solution of Fe-IL,ethanol and water is 1:1.5:3 by volume ratio,and pH should be controlled at 2.0.Under such conditions,a desulfurization rate greater than 90% could be obtained.The product of sulfuric acid had inhibition effect on the wet desulfurization process.With applying this new ternary desulfurization solution,not only the catalyst Fe-IL can be recycled and reused,but also the product sulfuric acid can be separated directly from the ternary desulfurization system. 相似文献
13.
14.
15.
16.
In this study, the oxidation rates of sulfur dioxide (SO2) in sulphuric acid solution by ozone and oxygen were compared, and the oxidation mechanism of ozone on SO2 was investigated. The results showed that the oxidation-reduction potential of the acidic solution was enhanced, the transformation rate of sulfuric acid to sulphuric acid was increased and the absorption driving force was improved in the presence of ozone. By comparing the amount of sulfate ions measured in the experiments and the theoretical amount of sulfate ions calculated from the amount of ozone consumed in the reaction, it can be confirmed that oxygen free radicals from dissociation of ozone are reactive as an efficient oxidant and oxygen from ozone generator participates in the reaction with SO2. 0.602 mol of effective oxygen was introduced into the reaction by one mole of ozone in 10.15 min at sulphuric acid concentration of 3% (by mass), SO2 concentration of 1.33% (by volume) and oxygen flow rate of 1.5 L·min-1 from ozone generator. 相似文献
17.
大气中的二氧化硫绝大部分与燃烧有关,而且主要是由煤炭的燃烧所产生,二氧化硫转化为酸雨严重地破坏了人类的生态环境。针对这一现状,文章综述了烟气脱硫中几种重要的二氧化硫净化技术。 相似文献
18.
在众多的烟气脱硫技术中,基于炭基吸附剂的干法脱硫技术由于其不产生二次污染以及易回收硫资源等优势倍受人们的关注。本文对该技术的脱硫机理、发展历史和工业应用现状进行了介绍,同时分析了干法脱硫技术的经济前景,并对该技术的发展趋势进行了展望。 相似文献
19.
A spouted bed of binary particle mixture was applied to a low temperature desulfurization process in order to develop a new type of semidry flue gas desulfurization (FGD) technology. We investigated the effects of operating parameters, such as type of SO2 sorbent, diameter of SO2 sorbent particles, apparent residence time of gas in the bed, approach to saturation temperature and Ca/S molar ratio, on SO2 removal in a bench-scale powder-particle spouted bed. We also investigated the utilization rate of SO2 sorbent and ways to enhance the efficiency of SO2 removal and SO2 sorbent utilization. The experimental results showed that SO2 removal is significantly affected by the approach to saturation temperature and Ca/S molar ratio, and that a high SO2 removal efficiency and effective sorbent utilization can be obtained under appropriate operating conditions. Thus, this new simple process of flue gas desulfurization is highly efficient and has little impact on the environment. 相似文献
20.
燃煤锅炉烟气中排放的二氧化硫是造成大气污染的主要成分之一。氨法脱硫技术是比较流行的控制燃煤锅炉烟气中SO2排放的有效方法,目前已广泛应用于诸多氮肥和石化企业的自备热电厂。文章针对晋煤中能化工2#热电锅炉投用的氨法脱硫装置运行情况进行了总结。 相似文献