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Coupled interactive effects of ammonia and hydrogen additions on ethylene diffusion flames: A detailed kinetic study

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Science China(Technological Sciences) 2024年第3期67卷 930-948页

作者： XIAO JiaYi XU TingTing SHU ZhiMei deng qige ZHAO Xuan YING YaoYao LI TianJiao LIU Dong MIIT Key Laboratory of Thermal Control of Electronic Equipment School of Energy and Power EngineeringNanjing University of Science and TechnologyNanjing 210094China Advanced Combustion Laboratory School of Energy and Power EngineeringNanjing University of Science and TechnologyNanjing210094China

In order to create effective combustion technologies and fuels with low or no carbon emissions,the research was conducted to assess the coupled interactive effects of NH_(3) and H_(2) additions on ethylene counterflow diffusion flames from a kinetic *** effects of the NH_(3)/H_(2) combination on flame temperatures,major species,key radicals,important intermediate species,representative oxygenated species and NO_xwere *** results of the study utilizing fictitious inert NH_(3) and/or H_(2) revealed the chemical effects of the two *** was found that the NH_(3)/H_(2) coupled effects had a more effective inhibitory effect on soot precursors than the effects of corresponding sum of single NH_(3) or H_(2) *** production of soot precursors was promoted by the coupled chemical effects of NH_(3) and H_(2),but the coupled dilution and thermal effects were observed to have a greater impact,resulting in a decrease of the mole fractions of soot *** for the interaction of NH_(3) and H_(2) effects,the presence of H_(2) decreased the chemical effects of NH_(3) on the augmentation of C_(2)H_(2),A1,A2,and CH_(3)CHO mole *** NH_(3) addition alleviated the H_(2) chemical effects on increasing C_(2)H_(2),C_(3)H_(3),A1 and A2 ***,the NH_(3)chemical effects on C_(3)H_(3),OH and CH_(3)CHO were enhanced when H_(2) was *** presence of NH_(3) augmented the chemical effects of H_(2) on the growth of OH mole ***,the H_(2) chemical effects hindered the production of NO and NO_(2) in the presence of NH_(3).

关键词： NH_(3)/H_(2)addition kinetic analysis coupled interactive effects chemical effects

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Comprehensive kinetic study on ammonia/ethylene counter-flow diffusion flames:influences of diluents

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International Journal of Coal Science & Technology 2024年第1期11卷 232-249页

作者： Zhimei Shu Tingting Xu Jiayi Xiao qige deng Xuan Zhao Tianjiao Li Yaoyao Ying Dong Liu MIIT Key Laboratory of Thermal Control of Electronic Equipment School of Energy and Power EngineeringNanjing University of Science and TechnologyNanjing210094China Advanced Combustion Laboratory School of Energy and Power EngineeringNanjing University of Science and TechnologyNanjing210094China

This study aimed to investigate the effects of ammonia addition on ethylene counter-flow diffusion flames with different diluents on the fuel or oxidizer side,using kinetic analyses.A special emphasis was put on assessing the coupled chemical effects of NH_(3) and CO_(2) on C2H4 combustion *** chemical effects could be evaluated by comparing fictitious inert NH_(3) or CO_(2) with normal active NH_(3) or CO_(2).The results revealed that the addition of NH_(3) decreased the mole fractions and production rates of key soot precursors,such as acetylene,propynyl,and *** CO_(2) was used as the dilution gas,the coupled chemical effects of NH_(3) and CO_(2) were affected by the chemical effects of CO_(2) to varying *** the oxidizer-side CO_(2) addition,the coupled chemical effects of NH_(3) and CO_(2) reduced the mole fractions of H,O,OH radicals,acetylene,propynyl,and benzene,while the effects differed from the fuel-side CO_(2) *** coupled chemical effects of NH_(3) and CO_(2) also promoted the formation of aldehyde contaminants,such as acetaldehyde,to some extent,particularly with CO_(2) addition on the oxidizer side.

关键词： Ammonia addition Diluents Coupled chemical effects Kinetic analysis

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内蒙古呼伦贝尔地区气候性滴状角膜变性流行病学调查

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眼科研究 2007年第12期25卷 978-981页

作者：其其格邓世靖郭振山殷晓棠苏日娜王智群乌云崔凯孙旭光内蒙古呼伦贝尔市医院海拉尔021008 首都医科大学附属北京同仁医院北京同仁眼科中心北京市眼科研究所北京100005 内蒙古呼伦贝尔市新巴尔虎右旗医院 021300

目的调查气候性滴状角膜变性(CDK)在内蒙古呼伦贝尔地区的发病情况,并初步分析其相关因素。方法对内蒙古呼伦贝尔地区牧业四旗进行人群抽样调查,共调查2558人,其中游牧人群1210人,农耕人群1348人,并对可能相关因素进行问卷调查。结果调... 详细信息

目的调查气候性滴状角膜变性(CDK)在内蒙古呼伦贝尔地区的发病情况,并初步分析其相关因素。方法对内蒙古呼伦贝尔地区牧业四旗进行人群抽样调查,共调查2558人,其中游牧人群1210人,农耕人群1348人,并对可能相关因素进行问卷调查。结果调查人群中发病年龄最小为20岁,总患病率为21.6%,男性为21.7%,女性为21.6%,男女患病率和严重程度差异无统计学意义(χ2=2.88,1.87,P=0.090,0.3929);患病率随年龄增加而增高,40岁以上人群患病率为38.9%;20岁以上人群中1级病变311人,占15.3%,2级病变242人,占11.9%,未发现3级病变患者;牧业四旗之间患病率比较,差异有统计学意义(χ2=38.12,P=0.00);游牧人群患病率和严重程度明显高于农耕人群,二者比较差异有统计学意义(χ2=630.41,P=0.00);调查发现:巴尔虎蒙古族患病率最高(52.8%),其次为布力亚特蒙古族(46.5%)、鄂温克族(40.8%),达斡尔族(1.6%)、汉族(1.3%)和科尔沁蒙古族(0.8%)最低,各民族患病率比较差异有统计学意义(χ2=646.19,P=0.00);通过相关因素分析发现CDK与年龄、放牧时间、民族及生活方式相关。结论CDK在内蒙古呼伦贝尔地区患病率较高,游牧人群高于农耕人群;不同民族患病率不同,其发生及严重程度与放牧时间、年龄、民族及生活方式有关。

关键词：气候性滴状角膜变性患病率致病因素呼伦贝尔

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