In this study,a series of CuCl_(2)-modified MnO_(x)-CeO_(x)nanorods were synthesized for the oxidation of Hg^(0).The addition of CuCl_(2)resulted in an enhancement in the catalyst’s Hg^(0)oxidation ability,and Hg^(0)...In this study,a series of CuCl_(2)-modified MnO_(x)-CeO_(x)nanorods were synthesized for the oxidation of Hg^(0).The addition of CuCl_(2)resulted in an enhancement in the catalyst’s Hg^(0)oxidation ability,and Hg^(0)oxidation efficiency reached>97%from 150 to 250°C.In the MnO_(x)-CeO_(x)catalysts,Mn^(4+)played the role of the active species for Hg^(0)oxidization,but in the CuCl_(2)-doped catalysts Cl−also contributed to Hg^(0)oxidation,conferring the superior performance of these samples.The introduction of SO_(2) led to a decrease in the availability of Mn^(4+),and the Hg^(0)oxidation efficiency of MnO_(x)-CeO_(x)decreased from about 100%to about 78%.By contrast,CuCl_(2)-promoted samples maintained a Hg^(0)oxidation efficiency of about 100%during the SO_(2) deactivation cycle due to the high reactivity of Cl−.展开更多
为了预防和消除管线钢在柴油中的腐蚀,采用宏观观察、扫描电镜(SEM)、能谱仪等对浸入不同水含量的0号柴油中的X60管线钢的腐蚀行为进行研究。结果表明:0号柴油可以在X60管线钢表面形成油膜,可增加管线钢的抗腐蚀能力,但水的存在将弱化...为了预防和消除管线钢在柴油中的腐蚀,采用宏观观察、扫描电镜(SEM)、能谱仪等对浸入不同水含量的0号柴油中的X60管线钢的腐蚀行为进行研究。结果表明:0号柴油可以在X60管线钢表面形成油膜,可增加管线钢的抗腐蚀能力,但水的存在将弱化油膜对X60管线钢的保护;当0号柴油中添加0.5 m L/L水,X60管线钢表面出现点蚀,点蚀数量和大小随着含水量增加而增加,也随浸泡时间延长而增加,水参与并控制X60钢的电化学腐蚀,腐蚀产物为黑色的氧化亚铁。展开更多
基金supported by the Zhejiang Provincial Natural Science Foundation of China(No.LQ22E060003)the General Research Projects of Zhejiang Provincial Department of Education in 2023(No.Y202353660)the Public Welfare Science and Technology Project of Ningbo City(No.202002N3105),China.
文摘In this study,a series of CuCl_(2)-modified MnO_(x)-CeO_(x)nanorods were synthesized for the oxidation of Hg^(0).The addition of CuCl_(2)resulted in an enhancement in the catalyst’s Hg^(0)oxidation ability,and Hg^(0)oxidation efficiency reached>97%from 150 to 250°C.In the MnO_(x)-CeO_(x)catalysts,Mn^(4+)played the role of the active species for Hg^(0)oxidization,but in the CuCl_(2)-doped catalysts Cl−also contributed to Hg^(0)oxidation,conferring the superior performance of these samples.The introduction of SO_(2) led to a decrease in the availability of Mn^(4+),and the Hg^(0)oxidation efficiency of MnO_(x)-CeO_(x)decreased from about 100%to about 78%.By contrast,CuCl_(2)-promoted samples maintained a Hg^(0)oxidation efficiency of about 100%during the SO_(2) deactivation cycle due to the high reactivity of Cl−.
文摘为了预防和消除管线钢在柴油中的腐蚀,采用宏观观察、扫描电镜(SEM)、能谱仪等对浸入不同水含量的0号柴油中的X60管线钢的腐蚀行为进行研究。结果表明:0号柴油可以在X60管线钢表面形成油膜,可增加管线钢的抗腐蚀能力,但水的存在将弱化油膜对X60管线钢的保护;当0号柴油中添加0.5 m L/L水,X60管线钢表面出现点蚀,点蚀数量和大小随着含水量增加而增加,也随浸泡时间延长而增加,水参与并控制X60钢的电化学腐蚀,腐蚀产物为黑色的氧化亚铁。
