The micelle generating process of the sodium dodecyl sulfate(SDS) solution with the addition of chemical inhibitors was elucidated using phase separation model, and the descending order of the capacity for the selecte...The micelle generating process of the sodium dodecyl sulfate(SDS) solution with the addition of chemical inhibitors was elucidated using phase separation model, and the descending order of the capacity for the selected chemical inhibitors to reduce the critical micelle concentrations of the solution are Mg Cl_2, Ca Cl_2,NH_4HCO_3 and NH_4Cl. The data to quantitatively describe the foam decay process, including foaming ratio,foam life and decay behaviors, was obtained by pressure measuring system. The results indicate that chemical inhibitors can improve the solution foamability. The capacity of the inhibitors to enhance the solution foamability is sorted as NH_4 Cl, NH_4HCO_3, Mg Cl2 and Ca Cl_2 which can distinctly improve the foam stability as well. The capacity of the inhibitors to enhance the SDS foam stability can be arranged as Mg Cl_2, NH_4 Cl, NH_4HCO_3 and Ca Cl_2. It is observed that the gravity drainage plays a leading role in the increase of proportion of diffusion drainage. The oxidation dynamic parameters of the coal samples treated by inhibition foams were investigated using thermal analysis technique, and their synergistic effects on inhibiting coal oxidation were explored.展开更多
The status quo of Ningxia Ningdong Energy-Chemical Base was introduced first, and the ecological civilization and low-carbon economy of Ningxia Ningdong Energy-Chemical Base were analyzed. Problems in the exploitation...The status quo of Ningxia Ningdong Energy-Chemical Base was introduced first, and the ecological civilization and low-carbon economy of Ningxia Ningdong Energy-Chemical Base were analyzed. Problems in the exploitation of resources in Ningxia Ningdong Energy-Chemical Base, and major factors which restrain the development, were discussed. Countermeasures were put forward at last.展开更多
在高中电化学学习里,学生的学习由宏观层面进入抽象的微观领域,考验学生的具体形象思维和抽象逻辑思维的相互转换能力。基于OBE理论(Outcome based education又称为成果导向教育、目标导向教育)的教学方法重视学生的个性化发展,能够让...在高中电化学学习里,学生的学习由宏观层面进入抽象的微观领域,考验学生的具体形象思维和抽象逻辑思维的相互转换能力。基于OBE理论(Outcome based education又称为成果导向教育、目标导向教育)的教学方法重视学生的个性化发展,能够让学生获得持久性理解知识。本文将OBE教育理念与高中电化学的大单元教学进行结合,提出了确定目标和学习成果、重视实践应用、团队合作和交流、多元化教学方法的对策。希望为教师在电化学教学时提供更为有效和科学的教学方法和策略,提高学生的学习效果。展开更多
基金supported by the National Natural Science Foundation of China(No.51274205)the State Key Laboratory for Coal Resources and Safe Mining,China University of Mining&Technology(No.SKLCRSM10KFB13)the Hebei Key Laboratory for Mine Disaster Prevention of China(No.KJZH2013K02)
文摘The micelle generating process of the sodium dodecyl sulfate(SDS) solution with the addition of chemical inhibitors was elucidated using phase separation model, and the descending order of the capacity for the selected chemical inhibitors to reduce the critical micelle concentrations of the solution are Mg Cl_2, Ca Cl_2,NH_4HCO_3 and NH_4Cl. The data to quantitatively describe the foam decay process, including foaming ratio,foam life and decay behaviors, was obtained by pressure measuring system. The results indicate that chemical inhibitors can improve the solution foamability. The capacity of the inhibitors to enhance the solution foamability is sorted as NH_4 Cl, NH_4HCO_3, Mg Cl2 and Ca Cl_2 which can distinctly improve the foam stability as well. The capacity of the inhibitors to enhance the SDS foam stability can be arranged as Mg Cl_2, NH_4 Cl, NH_4HCO_3 and Ca Cl_2. It is observed that the gravity drainage plays a leading role in the increase of proportion of diffusion drainage. The oxidation dynamic parameters of the coal samples treated by inhibition foams were investigated using thermal analysis technique, and their synergistic effects on inhibiting coal oxidation were explored.
文摘The status quo of Ningxia Ningdong Energy-Chemical Base was introduced first, and the ecological civilization and low-carbon economy of Ningxia Ningdong Energy-Chemical Base were analyzed. Problems in the exploitation of resources in Ningxia Ningdong Energy-Chemical Base, and major factors which restrain the development, were discussed. Countermeasures were put forward at last.
文摘在高中电化学学习里,学生的学习由宏观层面进入抽象的微观领域,考验学生的具体形象思维和抽象逻辑思维的相互转换能力。基于OBE理论(Outcome based education又称为成果导向教育、目标导向教育)的教学方法重视学生的个性化发展,能够让学生获得持久性理解知识。本文将OBE教育理念与高中电化学的大单元教学进行结合,提出了确定目标和学习成果、重视实践应用、团队合作和交流、多元化教学方法的对策。希望为教师在电化学教学时提供更为有效和科学的教学方法和策略,提高学生的学习效果。
