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Aiming at mercury and dioxin in fire coal gas as research objects, NTP (Non-thermal plasma，NTP) catalytic technology was used to investigate the degradation effect of operating condition parameters on mixed pollutants in mixed flue gas condition, and to explore the synergistic degradation of Hg0 and TCB (1,2,3-Trichlorobenzene, TCB) under mixed flue gas conditions. The research results showed that the conversion efficiency of mercury and TCB increased with the addition output of voltage, and decreased with the increase of the gas flow rate. Under optimal reaction conditions: voltage=17kV, frequency=300Hz, gas flow rate=2L/min, the conversion efficiency of Hg0 and TCB reached the highest 91.4% and 84.98%, respectively. In the NTP catalytic system, active free radicals played an important role in the synergistic conversion of mercury and TCB, which have a competitive effect, to make the conversion efficiency of mixed pollutants lower than a single substance. In the mixed flue gas condition, the mixed gas has an inhibitory effect on the synergistic conversion of mercury and TCB. Kinetic modeling of NTP catalytic synergistic reaction was established. Under three conditions of TCB, mercury and TCB, mixed simulated flue gas, the NTP catalytic technology showed a quasi-first-order kinetic reaction for the degradation of TCB. According to the synergistic effect of NTP and composites, the transformation and degradation of TCB mainly included two processes: TCB and ring opening, and Hg0 was finally oxidized to Hg2+.

Recycling of lead-acid batteries is an important sector of the lead-acid battery industry, and green technologies with low energy consumption and pollutant emission are in urgent demand. A new pre-desulfurization process of damped lead battery paste sodium carbonate based on “surface update” was developed, and the optimum reaction conditions were investigated. According to the experimental results, the process can maintain the sulfur content of lead paste under 0.5% at the optimum reaction conditions: pH = 8–10 and a molar ratio of Na 2 CO 3 to PbSO 4 of 1.00–1.10:1. The desulfurization efficiency increases with the reaction temperature and can be qualified within 40 min in each experiment. The effect of “surface update” contributes to the enhancing effect in the desulfurization process. The new process has a great advantage in desulfurization efficiency compared with the traditional processes.

The nano-ceramic which is mesoporous silica material was applied to test the removal efficiency of gas-phase Hg0 using a fixed-bed reactor. The physical and chemical properties of nano-ceramic were investigated by various techniques such as BET surface area (BET), X-ray diffraction, fourier transform infrared spectrometer (FTIR), and scanning electron microscope (SEM); then, the sample was tested for mercury adsorption under different conditions. The mercury adsorption tests shown that different Hg0 concentration, adsorption temperature, gas flow rate, and different gas components have significant effects on the mercury removal performance of nano-ceramic, and the adsorption removal rate of nano-ceramic can be 75.58% under the optimal experimental conditions. After fitting the experimental data to the adsorption model, it was found that the theoretical maximum mercury adsorption amount q max of nano-ceramic is 1.61 mg g−1 and there were physical and chemical adsorption at the same time. The adsorption kinetics fitting results shown that the adsorption process of nano-ceramic exhibits multi-segment characteristics of “transmembrane–diffusion–adsorption.”

Non-thermal plasma technology is a new type of odor treatment processing. We deal with H2S from waste gas emission using non-thermal plasma generated by dielectric barrier discharge. On the basis of two criteria, removal efficiency and absolute removal amount, we deeply investigate the changes in electrical parameters and process parameters, and the reaction process of the influence of ozone on H2S gas removal. The experimental results show that H2S removal efficiency is proportional to the voltage, frequency, power, residence time and energy efficiency, while it is inversely proportional to the initial concentration of H2S gas, and ozone concentration. This study lays the foundations of non-thermal plasma technology for further commercial application.