Papers by Author: Tao Zhu

Abstract: Due to the large flow, low concentration, low enrichment efficiency, potential safety hazards and the difficulty of comprehensive utilization, it is a big challenge for the development and application of enrichment and separation technology for coal mine ventilation methane (CMVM) at home and abroad. And many countries paid more and more attentions to resolve this problem. In this paper, we comprehensively introduce the research progress in the field of gas enrichment and separation of CMVM, and analyze the related research and application situation. Then, we put forward the enrichment and separation of CMVM in the future development will focus on high efficient adsorbent and adsorption & separation & enrichment technology and equipment, etc. in order to effectively form the system technology of separation & enrichment of CMVM. So we can provide technical support and auxiliary equipment for the domestic related enterprises, and ensure the mine safety and CMVM utilization. The application of CMVM in the laboratory can make mining engineering students learn how to use environmental technology to realize energy saving and emission reduction in coal mine.

Abstract: From the basic conditions of Chinese Coal Mine Methane (CMM) emission, the thesis studies the CMM discharge coefficient of different types of mines in china after establishing the “the output - emission regression function model” by the means of raw coal production. Besides, according to CMM’ distribution in different provinces’ (areas) of China, interprovincial emission factors will be calculated, laying foundation for the calculation of the CMM’s emission and reduction.

Abstract: he characteristics of pyrolysis gaseous are conducted out in a laboratory pyrolysis unit with a 30 g charge at vary finial temperature .Based on isothermal thermogravimetric analysis (TGA) was also applied to study the effects of heating rate on the pyrolysis characteristics of tailings in nitrogen atmosphere. The TG/DTG results show that the heating rate increases, the temperature of volatile matter initiation increases, the total volatile matter evolved decreases and the DTG peak shifts toward higher temperature range. The experiment indicated that with increasing heating temperature in rank, total gas, caloric value, H2 and CO yields gradually increases and CH4 and CO2 first increase and then decrease for all samples. The evolution behavior of gaseous products during primary devolatilisation (400–550°C)and secondary devolatilisation (700–850°C) was also discussed. The results showed that the gas yield was up to 4.306L and the largest capacity hydrogen production was 1.72L in the 950°C and by the charge (30 g ).

Abstract: Because of its wide pollution, large flow and low concentration, the waste gas containing volatile organic compound (VOCs) will be controlled more strictly on its emission, and new technologies for its treatment must be developed continuously. As an emerging technology for environmental protection, non-thermal plasma (NTP) has been subjected to extensive researches over the past 20 years. In the field of air pollution control, the NTP technology has been used for the abatement of various types of hazardous air pollutants due to its unique properties including the moderate operation conditions (normal temperature and atmospheric pressure), moderate capital cost, compact system, easy operations and short residence times, compared to the conventional technologies. Especially, combined plasma technology has multi-function effects, better pollutant degradation efficiency, better energy utilization efficiency and higher pollutant selectivity than single plasma technology. The research progresses in treatment of waste gas containing VOCs and the patents application by plasma technology combined with adsorbent, catalyst and ferroelectric are summarized and analyzed. From the review, we can come to a conclusion the synergistic technology result in greater enhancement of VOCs decomposition and energy efficiency. The development direction of combined plasma technology is prospected.

Abstract: In view of the toxicology and hazardous nature of the submicron particles, it is paid more and more attentions of the domestic and foreign research scholars. In this paper, we introduce the research progress on recognition, attributed and formation mechanism of submicron particles in the world. Simultaneously, the controlling technologies of submicron particles are discussed. The application tendency and the existence problems of the controlling technologies are analyzed. At last, the future research directions are put forward for submicron particles control.

Abstract: This paper reviews co-pyrolysis processes of different researchers and institutions, depicts the co-pyrolysis process of biomass and plastic wastes, coal and refuse plastic and coal and woody biomass, and makes recommendations for different processes. This article summarizes different researches on co-pyrolysis for product quantity and properties in different parameters such as waste blends and temperature,reaction time,pressure etc. We suggest that radical reactions between the co-pyrolytic materials are primarily responsible for the observed behavior.and that co-pyrolysis not only solves the H/C ratio but decrease reaction temperature and increased product content and improved product properties and its behavior as a fuel.

Abstract: Nano-catalyst was prepared in the lab. Non-thermal plasma was generated by dielectric barrier discharge (DBD). Through nano-catalyst coupled with non-thermal plasma, a series of experiments for toluene decomposition were carried out. Based on reactor input energy density and removal efficiency and energy efficiency and inhibition for O₃ formation, the load amount MnO_x catalyst on the surface of γ-Al₂O₃ pellets were compared in the experiment. The results show the catalysis performance of 10 wt% MnO_x/γ-Al₂O₃ coupled with non-thermal plasma resulted in higher removal efficiency of toluene and better energy efficiency. At the same time, 10 wt% MnO_x/γ-Al₂O₃ operated on a better inhibition for O₃ formation in the gas exhaust.

Abstract: A series of experiments were performed for toluene removal from a gaseous influent at normal temperature and atmospheric pressure by adsorption & non-thermal plasma strength & nano-catalysis technology. Non-thermal plasma was generated by dielectric barrier discharge. Sorbent & nano-catalyst were called combined catalyst which included MnO2/γ-Al2O3 and nano-Ba0.8Sr0.2Zr0.1Ti0.9O3 catalyst. MnO2/γ-Al2O3 has an advantage for ozone removal, while nano-Ba0.8Sr0.2Zr0.1Ti0.9O3 is a kind of good material for improving energy utilize rate. The results showed the synergistic technology resulted in greater enhancement of toluene removal efficiency and energy efficiency and a better inhibition for O3 formation in the gas exhaust. Based on data analysis of FT-IR, the experiment discussed decomposition mechanism and reaction process of toluene. The results showed that synergic effect could control byproducts effectively.

Abstract: In this paper, fluorine & antimony-doped tin oxide (FATO) transparent conductive thin films are deposited by Spray Pyrolysis on glass substrate, and low emissivity properties achieved. The emissivity of glass in far infrared region is optimized by changing the spray volume, the resistivity and sheet resistance of thin films. Research shows that the resistivity of thin films has important influence on infrared reflectance and hemispheric emissivity. This paper further investigates the quantitative relationship between emissivity and resistivity of low-E glass and also provides a basis for emissivity control and performance evaluation of Low-E glass.