A new adsorbent was successfully prepared by hydrothermal treatment and chemical activation through coal gasification fine slag(CGFS)and blue algae(BA)as raw materials and used for CO_(2)capture.The CO_(2)chemisorptio...A new adsorbent was successfully prepared by hydrothermal treatment and chemical activation through coal gasification fine slag(CGFS)and blue algae(BA)as raw materials and used for CO_(2)capture.The CO_(2)chemisorption capacity of the adsorbent was further enhanced by taking advantage of the nitrogenous bases contained in the BA.In the hydrothermal process,the addition of BA significantly increased the content of pyrrole nitrogen in the adsorbent.In the activation process,pyrrole nitrogen gradually changed into pyridine nitrogen and graphite nitrogen.Increased BA addition result in a higher specific surface area and microporosity of the adsorbent.The CO_(2)adsorption performance test proved that the CGFS-50%-CA sample has the strongest CO_(2)adsorption capacity at low temperature,up to 15.59 cm^(3)/g,which is mainly through physical adsorption,and the CGFS-10%-CA sample has the strongest CO_(2)adsorption capacity at high temperature,up to 7.31 cm^(3)/g,which is mainly through chemical adsorption.CO_(2)uptake of the CGFS-10%-CA sample was well maintained after 10 cycles,with regeneration efficiencies above 99%.The results indicate that the novel adsorbents with coexistence of physical and chemical adsorption have great potential for CO_(2)adsorption applications.展开更多
本文针对钢塑车间 PE 管头的污染与二次利用展开研究,分析了其污染成因,包括机械加工环节的切割、热熔等污染因素,润滑剂与金属碎屑附着机制,环境粉尘静电吸附及质量控制薄弱环节。同时阐述了二次利用工艺,涵盖分类收集、双级破碎、三...本文针对钢塑车间 PE 管头的污染与二次利用展开研究,分析了其污染成因,包括机械加工环节的切割、热熔等污染因素,润滑剂与金属碎屑附着机制,环境粉尘静电吸附及质量控制薄弱环节。同时阐述了二次利用工艺,涵盖分类收集、双级破碎、三级清洗与超声波强化结合的回收工艺流程优化,污染物去除及材料性能恢复技术,表面改性方法以及严格的再加工质量控制标准。还探讨了二次利用中的技术难点及解决方案,旨在实现 PE 管头的高效二次利用。展开更多
基金supported by the National Natural Science Foundation of China(22168032)the National Key Research and Development Program of China(2023YFC3904302,2023YFB4103500)the Key Projects of Ning Dong Energy and Chemical Industry Base(2023NDKJXMLX022).
文摘A new adsorbent was successfully prepared by hydrothermal treatment and chemical activation through coal gasification fine slag(CGFS)and blue algae(BA)as raw materials and used for CO_(2)capture.The CO_(2)chemisorption capacity of the adsorbent was further enhanced by taking advantage of the nitrogenous bases contained in the BA.In the hydrothermal process,the addition of BA significantly increased the content of pyrrole nitrogen in the adsorbent.In the activation process,pyrrole nitrogen gradually changed into pyridine nitrogen and graphite nitrogen.Increased BA addition result in a higher specific surface area and microporosity of the adsorbent.The CO_(2)adsorption performance test proved that the CGFS-50%-CA sample has the strongest CO_(2)adsorption capacity at low temperature,up to 15.59 cm^(3)/g,which is mainly through physical adsorption,and the CGFS-10%-CA sample has the strongest CO_(2)adsorption capacity at high temperature,up to 7.31 cm^(3)/g,which is mainly through chemical adsorption.CO_(2)uptake of the CGFS-10%-CA sample was well maintained after 10 cycles,with regeneration efficiencies above 99%.The results indicate that the novel adsorbents with coexistence of physical and chemical adsorption have great potential for CO_(2)adsorption applications.
文摘本文针对钢塑车间 PE 管头的污染与二次利用展开研究,分析了其污染成因,包括机械加工环节的切割、热熔等污染因素,润滑剂与金属碎屑附着机制,环境粉尘静电吸附及质量控制薄弱环节。同时阐述了二次利用工艺,涵盖分类收集、双级破碎、三级清洗与超声波强化结合的回收工艺流程优化,污染物去除及材料性能恢复技术,表面改性方法以及严格的再加工质量控制标准。还探讨了二次利用中的技术难点及解决方案,旨在实现 PE 管头的高效二次利用。
