Experiment Study Of Catalytic Flow Reverse Reactor For Ventilation Air Methane

Methane has vital importance on the global warming, the effect of which on climate change is almost20times as the carbon dioxide. Energy sector is the second biggest contributor to the methane emissions, coal mining plays an important part in it. Methane emissions through the ventilation air of methane (VAM) account for60%-70%of the coal mine emissions. VAM has extremely low methane concentration (<1%) and huge volume flow, both are variable all the time. As a consequence, it is difficult to recover the heat of VAM, which is usually discharged to the atmosphere directly. It is not only a destruction of the environment but also a waste of energy. The thesis built up a laboratory device to oxidize the methane, in which both theoretical and experimental study is carried out.Firstly, the catalytic flow reverse reactor (CFRR) is chosen after the comparative analysis of several mitigation and utilization methods. The energy balance calculation is taken to support the reliability verification. Pt, Pd and Rh mainly work on the ceramic honeycomb catalyst support. Wall-type heat exchanger method is used in the design and calculation of the oxidation bed.Based on the calculation, the device which consists of the gas supply system, regenerator system, direction conversion system and control system is built up, for the capacity of100Nm3/h, methane concentration of0.5%～1%. During the experiment, several parameters were commissioning to achieve the best performance. The pre-heating progress and single-direction experiment are held independently. The thermodynamic properties and performance is also proved by FLUENT computer simulation of the device.According to the analysis of the statistics, the thesis proposes some particular suggestion of the experiment. The experiment proves that self-maintenance running of CFRR can be realized as well as the environmental and economy benefits are significant. The experimental data is invaluable for further large-scale device improvement research, and laid the foundation for the next step to build the research and development of products with independent intellectual property rights.