系统介绍了燃烧后化学吸收法脱碳工艺流程及技术特点,从强化吸收、强化解吸和联合工艺3个方面对节能工艺的工艺原理、节能效果以及研究现状进行了总结.强化吸收包括吸收塔中间冷却和贫液分流工艺,强化解吸包括解吸塔中间加热、富液分流、蒸汽压缩、多压力解吸工艺,分析表明,富液分流、蒸汽压缩和多压力解吸工艺具有较好的节能效果,对多种节能工艺集成优化具有更显著的节能优势.对吸收剂与节能工艺间的匹配性问题展开了讨论,结果表明,开发低能耗吸收剂并结合节能工艺的优化是实现化学吸收法脱碳工艺降本增效的重要研究方向.
以氯化锶、硝酸锶、硝酸铜、硝酸锂、硝酸钴和硝酸铝为成核剂,研究了几种成核剂分别对30％氯化钙溶液过冷度的影响.结果表明,分别添加适量硝酸铜、硝酸锂、硝酸钴、硝酸铝虽能降低30％氯化钙溶液的过冷度,但会降低其相变潜热;而添加1.5％Sr(NO3)2或1.0％SrCl2·6H2O成核剂,既能有效地去除30％氯化钙溶液的过冷度,又对其相变潜热基本无影响,是较理想的成核剂.考虑到硝酸盐是无机盐材料中具有防腐性能且相变潜热值和导热系数较高的材料,故选择1.5％Sr(NO3)2作成核剂.
以国内LNG接收站为研究对象,开展LNG工业园区能源耦合技术研究,利用电厂等项目提供的温排海水作为LNG气化的热源,为LNG接收站设计建造提供新思路,实现LNG冷能、工业余热等能源的有效利用,保护海洋环境,在园区内形成循环绿色经济体系,产生显著的经济效益和社会效益.通过分析LNG接收站常规取水工程和温排海水取水工程案例,研究技术可行性,为后续工业园区规划和配套项目的建设提供思路与参考.
CeO2 was prepared using a hydrothermal method, modified by radio-frequency plasma in the form of glow discharge, and then the solid superacid S2O82−/CeO2 was prepared by the impregnation method. A series of properties such as pore structure was characterized by N2 adsorption–desorption experiments, surface morphology was characterized by TEM, crystal phase was characterized by XRD, and surface acidity of the catalyst was characterized by Py-IR and Hammett titration. The methyl esterification reaction of tryptophan was used to evaluate the activity of the solid superacid. The results showed that the catalyst modified by radio-frequency plasma had a larger specific surface area, more surface oxygen vacancies, smaller particle size, and higher total acid content. The yield of tryptophan methyl ester reached a higher level of 94.5% (150 °C, 1 MPa, 2 h), catalyzed by the modified S2O82−/CeO2. This work verified the feasibility of plasma technology in the field of catalytic activity enhancement of solid superacid.
This paper reviews the research progress on the migration mechanism of small molecule organic matters in electrodialysis treatment of high salinity organic wastewater.The effects of current, voltage, initial concentration of organic matter and pH value in different inorganic salt systems on the separation and removal of organic matters are analyzed.The pollution trend of membrane by organic matters in electrodialysis process is combed, and the development directions are prospected for electrodialysis treatment of high salinity organic wastewater.
