甲烷浓度检测新方法的研究
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摘要
第一章:介绍目前甲烷气体检测的各种方法及原理,并对煤矿瓦斯气体检测的研究现状进行综述,评价各种检测方法和检测装置的优缺点。
第二章:提出一种甲烷浓度检测的新方法,此方法是根据甲烷气体燃烧前后的产物通过气体吸收剂后的体积变化来间接测量甲烷的浓度。据此原理设计实验方案,搭建实验系统,对实验系统中各部件进行考察筛选,研制出一种甲烷浓度检测装置,并对甲烷气体进行初步检测。该检测系统对甲烷工作曲线方程为y=28.667x-0.0189(r=0.9976),相对标准偏差为16.3%,符合有关国际方面的标准(＜±25%)。
第三章:考察催化元件的化学修饰材料碳纳米管的红外光谱和扫描电镜的特性。以催化元件为载体,对其表面进行碳纳米管修饰,按照实验设计装置图,连接碳纳米管修饰后的催化元件进行甲烷气体的检测。研究经碳纳米管修饰前后催化元件对甲烷气体响应的灵敏度和工作曲线,结果表明用碳纳米管修饰后的催化元件灵敏度更高。
第四章:选用一种对甲烷气体敏感的半导体材料二氧化锡,选用四氯化锡和二氯化锡作为原料,采用共沉淀法制备二氧化锡半导体膜,并考察了二氧化锡膜的红外光谱特性和透射电镜分析,同时对二氧化锡半导体膜进行了Fe~(3+)的掺杂。并设计甲烷气体检测的装置,按照实验装置连好各个部件对甲烷气体进行初步检测。并对气敏传感元件的灵敏度等性能参数做阐述。结果表明:采用二氧化锡半导体对甲烷检测具有一定的应用前景,对其他离子的掺杂有待于进一步的研究。
第五章:对燃烧前后体积变化的甲烷浓度检测新方法、碳纳米管修饰后的催化元件检测甲烷和二氧化锡半导体检测甲烷三种检测方法的比较,结果表明甲烷浓度检测新方法的准确度好,灵敏度高,并对其进一步的研究提出展望。
Chapter 1: Methods and principle for detecting methane are introduced. Present research situation about mine gas is summarized. Advantages and disadvantages are appraised about each method and apparatus.
Chapter 2: A new method for detecting methane indirectly is proposed, according to changes in volume owning to burning. Experimental plan is designed by this principle. And experimental system is built. Various parts in the system have been carried on inspecting. One kind of methane detector has been developed, which is used to initial survey of methane. The system to the methane working curve equation is y=28.667x-0.0189 (r=0.9976), the relatively standard deviation is 16.3%, conforming to the related international standard (<±25%).
Chapter 3: Characteristics of infrared spectrum and scanning electron microscope of carbon nanometer tubes, used to modify catalysis part, are inspected. Taking catalyzing articles as carrier, carbon nanotubes as surface modified materials, we designed working principle diagram. Catalyzing articles modified by carbon nanotubes are constructed to detect methane. Response sensitivity and the working curve of this system to methane are studied. Sensitivity of catalyzing part increased after modifying by carbon nanotubes.
Chapter 4: Semi conducting material-tin peroxide is selected for sensitive substance to methane. Selection of tin tetrachloride and two chloride as a raw material used coprecipitation into nano-tin oxide Semiconductor membrane of tin peroxide is prepared by coprecipitation, Characteristics of infrared spectrum and transmission electron microscope analyzing are inspected about tin peroxide membrane. Simultaneously, Fe~(3+) is blended to this membrane. Experimental plan is designed by this principle. And experimental system is built. And performance parameters are reviewed, such as, sensitivity and so on. The results showed that: tin oxide semiconductor testing of methane has a prospect for other ion doping to be further studied.
Chapter 5: Three kinds of methods used for detecting methane are compared, such as, new method, catalyzing articles modified by carbon nanometer tube, and semiconductor tin peroxide, which indicates accuracy and sensitivity of new method are better than others. Further researching work about this system is expected.
第二章:提出一种甲烷浓度检测的新方法,此方法是根据甲烷气体燃烧前后的产物通过气体吸收剂后的体积变化来间接测量甲烷的浓度。据此原理设计实验方案,搭建实验系统,对实验系统中各部件进行考察筛选,研制出一种甲烷浓度检测装置,并对甲烷气体进行初步检测。该检测系统对甲烷工作曲线方程为y=28.667x-0.0189(r=0.9976),相对标准偏差为16.3%,符合有关国际方面的标准(＜±25%)。
第三章:考察催化元件的化学修饰材料碳纳米管的红外光谱和扫描电镜的特性。以催化元件为载体,对其表面进行碳纳米管修饰,按照实验设计装置图,连接碳纳米管修饰后的催化元件进行甲烷气体的检测。研究经碳纳米管修饰前后催化元件对甲烷气体响应的灵敏度和工作曲线,结果表明用碳纳米管修饰后的催化元件灵敏度更高。
第四章:选用一种对甲烷气体敏感的半导体材料二氧化锡,选用四氯化锡和二氯化锡作为原料,采用共沉淀法制备二氧化锡半导体膜,并考察了二氧化锡膜的红外光谱特性和透射电镜分析,同时对二氧化锡半导体膜进行了Fe~(3+)的掺杂。并设计甲烷气体检测的装置,按照实验装置连好各个部件对甲烷气体进行初步检测。并对气敏传感元件的灵敏度等性能参数做阐述。结果表明:采用二氧化锡半导体对甲烷检测具有一定的应用前景,对其他离子的掺杂有待于进一步的研究。
第五章:对燃烧前后体积变化的甲烷浓度检测新方法、碳纳米管修饰后的催化元件检测甲烷和二氧化锡半导体检测甲烷三种检测方法的比较,结果表明甲烷浓度检测新方法的准确度好,灵敏度高,并对其进一步的研究提出展望。
Chapter 1: Methods and principle for detecting methane are introduced. Present research situation about mine gas is summarized. Advantages and disadvantages are appraised about each method and apparatus.
Chapter 2: A new method for detecting methane indirectly is proposed, according to changes in volume owning to burning. Experimental plan is designed by this principle. And experimental system is built. Various parts in the system have been carried on inspecting. One kind of methane detector has been developed, which is used to initial survey of methane. The system to the methane working curve equation is y=28.667x-0.0189 (r=0.9976), the relatively standard deviation is 16.3%, conforming to the related international standard (<±25%).
Chapter 3: Characteristics of infrared spectrum and scanning electron microscope of carbon nanometer tubes, used to modify catalysis part, are inspected. Taking catalyzing articles as carrier, carbon nanotubes as surface modified materials, we designed working principle diagram. Catalyzing articles modified by carbon nanotubes are constructed to detect methane. Response sensitivity and the working curve of this system to methane are studied. Sensitivity of catalyzing part increased after modifying by carbon nanotubes.
Chapter 4: Semi conducting material-tin peroxide is selected for sensitive substance to methane. Selection of tin tetrachloride and two chloride as a raw material used coprecipitation into nano-tin oxide Semiconductor membrane of tin peroxide is prepared by coprecipitation, Characteristics of infrared spectrum and transmission electron microscope analyzing are inspected about tin peroxide membrane. Simultaneously, Fe~(3+) is blended to this membrane. Experimental plan is designed by this principle. And experimental system is built. And performance parameters are reviewed, such as, sensitivity and so on. The results showed that: tin oxide semiconductor testing of methane has a prospect for other ion doping to be further studied.
Chapter 5: Three kinds of methods used for detecting methane are compared, such as, new method, catalyzing articles modified by carbon nanometer tube, and semiconductor tin peroxide, which indicates accuracy and sensitivity of new method are better than others. Further researching work about this system is expected.
引文
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