This paper briefly introduces the process of the hydrocracking reactor made of the steel 1 25Cr-0 5Mo -Si,analyzes the weldability of the steel,make measures to prevent the welds from cold cracking、reheat cracking an...This paper briefly introduces the process of the hydrocracking reactor made of the steel 1 25Cr-0 5Mo -Si,analyzes the weldability of the steel,make measures to prevent the welds from cold cracking、reheat cracking and temper embrittlement,makes out the optimum parameters and the procedures that make the complete product meet the requirement of mechanical properties.展开更多
This paper presents the research on the whole body restoration of over-service-time reforming reactors from the experiment study to the development of normalizing procedure.It is found that parts of alloy element in s...This paper presents the research on the whole body restoration of over-service-time reforming reactors from the experiment study to the development of normalizing procedure.It is found that parts of alloy element in solid solution transform to carbide, and carbide phase transformation occurs forming carbide precipitation concentrated at grain boundaries. As a result,the material toughness becomes worse seriously and the whole unit can not be run normally.Through the study of specimens,it is found that the best way to repair it is to use a special heat treatment procedure i.e. normalization under spray type cooling.A special spray cooling unit was designed for this purpose. The test-plate examination results prove that material physical properties have been improved after normalizing for the whole body reactor under spray type cooking. Through the assessment, the reactor can be used again.展开更多
Methanol is regarded as an important liquid fuel for hydrogen storage, transportation, and in-situ generation due to its convenient conveyance, high energy density, and low conversion temperature. In this work, an ove...Methanol is regarded as an important liquid fuel for hydrogen storage, transportation, and in-situ generation due to its convenient conveyance, high energy density, and low conversion temperature. In this work, an overview of state-of-the-art investigations on methanol reforming is critically summarized, including the detailed introduction of methanol conversion pathways from the perspective of fuel cell applications, various advanced materials design for catalytic methanol conversion, as well as the development of steam methanol reformers. For the section of utilization pathways, reactions such as steam reforming of methanol, partial oxidation of methanol, oxidative steam reforming of methanol, and sorption-enhanced steam methanol reforming were elaborated;For the catalyst section, the strategies to enhance the catalytic activity and other comprehensive performances were summarized;For the reactor section, the newly designed steam methanol reformers were thoroughly described. This review will benefit researchers from both fundamental research and fuel cell applications in the field of catalyzing methanol to hydrogen.展开更多
文摘This paper briefly introduces the process of the hydrocracking reactor made of the steel 1 25Cr-0 5Mo -Si,analyzes the weldability of the steel,make measures to prevent the welds from cold cracking、reheat cracking and temper embrittlement,makes out the optimum parameters and the procedures that make the complete product meet the requirement of mechanical properties.
文摘This paper presents the research on the whole body restoration of over-service-time reforming reactors from the experiment study to the development of normalizing procedure.It is found that parts of alloy element in solid solution transform to carbide, and carbide phase transformation occurs forming carbide precipitation concentrated at grain boundaries. As a result,the material toughness becomes worse seriously and the whole unit can not be run normally.Through the study of specimens,it is found that the best way to repair it is to use a special heat treatment procedure i.e. normalization under spray type cooling.A special spray cooling unit was designed for this purpose. The test-plate examination results prove that material physical properties have been improved after normalizing for the whole body reactor under spray type cooking. Through the assessment, the reactor can be used again.
基金Project(51876224)supported by the National Natural Science Foundation of ChinaProject(2020CX008)supported by the Innovation-Driven Project of Central South University,China。
文摘Methanol is regarded as an important liquid fuel for hydrogen storage, transportation, and in-situ generation due to its convenient conveyance, high energy density, and low conversion temperature. In this work, an overview of state-of-the-art investigations on methanol reforming is critically summarized, including the detailed introduction of methanol conversion pathways from the perspective of fuel cell applications, various advanced materials design for catalytic methanol conversion, as well as the development of steam methanol reformers. For the section of utilization pathways, reactions such as steam reforming of methanol, partial oxidation of methanol, oxidative steam reforming of methanol, and sorption-enhanced steam methanol reforming were elaborated;For the catalyst section, the strategies to enhance the catalytic activity and other comprehensive performances were summarized;For the reactor section, the newly designed steam methanol reformers were thoroughly described. This review will benefit researchers from both fundamental research and fuel cell applications in the field of catalyzing methanol to hydrogen.
