187. Amin Zhou, Jing-Lin Liu, Bin Zhu, Lan-Bo Di, Xiao-Song Li, Ai-Min Zhu*. Plasma catalytic removal of VOCs using cycled storage-discharge (CSD) mode: Tandem effect of zeolite adsorbents and Au catalysts on complete oxidation of toluene[J]. Plasma Processes and Polymers, 2023, 20:e2200236.
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High-silica zeolite adsorbents (ZAs) are employed for plasma catalytic removal of toluene with cycled storage-discharge mode in this work. At 5 min discharge time of the discharge stage in air plasma (20% O2 in N2), toluene conversion attains 100%, obtaining 22% CO and 26% CO2 selectivities. After 20 min discharge time, the air plasma gives the selectivities to CO of ~30% and CO2 of ~60%. For complete oxidation of toluene to CO2, ZA and Au catalysts are combined and a tandem effect of in-plasma ZA and postplasma Au catalysts is achieved, featuring nearly 100% CO2 selectivity at 100% toluene conversion. Dependences of the tandem effect on Au loading and space velocity ratio of ZA to Au catalyst are investigated.
186. Zhang, T. Q., Li, X. S., Liu, J. L., Wen, X. Q., & Zhu, A. M. (2023). Plasma Nitrogen Fixation: NOx Synthesis in MnOx/Al2O3 Packed-Bed Dielectric Barrier Discharge. Plasma Chemistry and Plasma Processing.2023,43:1907–1919.
The plasma nitrogen fixation for NOx synthesis from N-2 and O-2 in MnOx/Al2O3 packed-bed dielectric barrier discharge (DBD) and an enhanced effect of MnOx/Al2O3 catalyst are reported. At N-2 content of 50% and SEI of similar to 16 kJ/mol (flow rate of 800 SCCM and discharge power of similar to 9.5 W), NOx production rates are 0.28 SCCM for Al2O3 and 0.42 SCCM for MnOx/Al2O3, and improved by similar to 60% due to the enhanced effect of MnOx/Al2O3. The enhanced effect becomes more significant at lower specific energy input (SEI) or higher N-2 content (lower O-2 content). The MnOx/Al2O3-packed DBD features much more and lower-intensity micro-discharges, larger total capacitance, greater peak-to-peak charge, and higher vibrational temperature of N-2 than the Al2O3-packed DBD. The surface role of MnOx/Al2O3 catalyst in the enhanced effect was disclosed by two-step surface reaction processes and in-situ temperature programed desorption for the adsorbed species of the first step.
185. Hao-Yu Lian, Yi-Zhi Wang, Yun Ru, Amin Zhou, Xiao-Song Li, Ai-Min Zhu*, A novel process of cyclic adsorption and plasma desorption for ppm-level CO removal from H2-rich stream, International Journal of Hydrogen Energy, 2023, 64:25092-25099. https://doi.org/10.1016/j.ijhydene.2022.08.259
A cyclic adsorption and plasma-desorption (CAPD) process is applied to remove ppm-level carbon monoxide (CO) from the H2-rich stream for the first time. In the CAPD process, CO is first selectively adsorbed on CuCl/γ-Al2O3 till adsorption saturation; Then, the adsorbed CO is in-situ desorbed by plasma generated in dielectric barrier discharge (DBD) and the adsorbent is regenerated simultaneously. The effects of discharge power (Pdis) and flow rate of discharge gas (FD) on performances of plasma-desorption are investigated. The time to reach desorption of 50% (t50) and 90% (t90) significantly decreases with Pdis but is weakly correlated to the FD. At the investigated conditions, t50 and t90 are lower than 2.6 min and 4.5 min, respectively, which indicates that plasma-desorption features high desorption rate. In addition, desorption efficiency of plasma-desorption is higher than 98%. Moreover, CAPD process stability is preliminarily confirmed by six consecutive adsorption-desorption cycles.
184. Amin Zhou, Jing-Lin Liu, Bin Zhu, Lanbo Di, Xiao-Song Li*, Ai-Min Zhu*, Plasma catalytic removal of VOCs using cycled storage-discharge (CSD) mode: Tandem effect of zeolite adsorbents and Au catalysts on complete oxidation of toluene, Plasma Processes and Polymers, 2023, 20: e2200236. https://doi.org/10.1002/ppap.202200236
High-silica zeolite adsorbents (ZAs) are employed for plasma catalytic removal of toluene with cycled storage-discharge mode in this work. At 5 min discharge time of the discharge stage in air plasma (20% O-2 in N-2), toluene conversion attains 100%, obtaining 22% CO and 26% CO2 selectivities. After 20 min discharge time, the air plasma gives the selectivities to CO of similar to 30% and CO2 of similar to 60%. For complete oxidation of toluene to CO2, ZA and Au catalysts are combined and a tandem effect of in-plasma ZA and postplasma Au catalysts is achieved, featuring nearly 100% CO2 selectivity at 100% toluene conversion. Dependences of the tandem effect on Au loading and space velocity ratio of ZA to Au catalyst are investigated.
183. Jing-Lin Liu, Yu Gao, Bing Sun*, Bin Zhu, Xiao-Song Li, Ai-Min Zhu*, Mechanism study on gliding arc (GA) plasma reforming: A combination approach of experiment and modeling, Plasma Processes and Polymers, 2022, 19: e2200077. https://doi.org/10.1002/ppap.202200077
182. Zhiguang Sun, Chenyang Liu, Xiao-Song Li, Yurui Fang, Xiaobing Zhu*, Ai-Min Zhu, Semi-transparent nanofilms of plasmonic Au/TiO2 for visible-light photocatalysis, Materials Chemistry and Physics, 2022, 280: 125773. https://doi.org/10.1016/j.matchemphys.2022.125773
181. Ye-Cheng Li, Xiao-Song Li, Bin Zhu*, Xiaobing Zhu, Hao-Yu Lian, Ai-Min Zhu*, A facile approach to direct preparation of Pt nanocatalysts from oxidative dechloridation of supported H2PtCl6 by oxygen plasma, Journal of Catalysis, 2022, 414: 16. https://doi.org/10.1016/j.jcat.2022.08.022
180. Xiao-Song Li, Ye-Cheng Li, Li-Yuan Wang, Jing-Lin Liu, Ai-Min Zhu*, Real-time measurement of axial temperature in a coaxial dielectric barrier discharge reactor and synergistic effect evaluation for in-plasma catalytic CO2 reduction, Plasma Processes and Polymers, 2022, 19: e2100229. https://doi.org/10.1002/ppap.202100229
179. Amin Zhou, Jing-Lin Liu, Bin Zhu, Xiao-Song Li*, Ai-Min Zhu*, Plasma catalytic removal of VOCs using cycled storage-discharge (CSD) mode: An assessment methodology based on toluene for reaction kinetics and intermediates, Chemical Engineer...
