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Layered double hydroxides/oxidized carbon nanotube nanocomposites for CO2 capture
Junya Wang,Liang Huang,Qianwen Zheng,Yaqian Qiao,Qiang Wang 한국공업화학회 2016 Journal of Industrial and Engineering Chemistry Vol.36 No.-
A systematic investigation on the influence of synthesis method and chemical composition of LDH/oxidized carbon nanotube (LDH/OCNT) nanocomposites on their CO2 capture performance wereperformed. Three LDH/OCNT nanocomposites were prepared using two methods: ‘‘electrostatic selfassembly’’and ‘‘direct co-precipitation’’. All LDH/OCNT nanocomposites were thoroughly characterized. The isothermal CO2 adsorption at different temperatures (60–400 8C) and adsorption/desorption cyclingtests were conducted. Both the CO2 adsorption capacity and the multi-cycle stability of LDH derivedadsorbents were improved by the introduction of OCNT. In particular, the absolute CO2 capture capacityof Mg-Al-NO3 LDH was increased by more than twice by adding 9.1 wt% OCNT.
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Junya Huo,Hanlin Zhan,Gaolin Wang,Nannan Zhao,Dawei Ding,Lianghong Zhu,Dianguo Xu 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
In the electrolytic capacitor-less PMSM drives, the LC resonance between small film capacitor in the DC bus and the inductance in the grid side is analyzed in this paper. Since the electrolytic capacitor is replaced by a small film capacitor in the DC bus, the LC resonance phenomena cannot be neglected, which will result in the underdamping characteristics of the electrolytic capacitor-less motor drives. Hence, the detailed model is established to reveal the resonance mechanism. Based on the model, a current harmonics suppression strategy is also proposed. The proposed control strategy can improve the power factor and reduce the current harmonics in the grid side. In addition, it can improve the system efficiency and enhance the stability of the drives. The proposed method is experimentally validated on an electrolytic capacitor-less PMSM drive applied in 1.5 HP variable frequency air-conditioner.
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Research on Li0.3Na0.18K0.52NO3 promoted Mg20Al-CO3 LDH/GO composites for CO2 capture
Ying Yang,Kai Chen,Liang Huang,Min Li,Taiping Zhang,Mi Zhong,Ping Ning,Junya Wang,Shikun Wen 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.102 No.-
It has been reported that the addition of graphene oxide (GO) can increase the dispersion and heterogeneousnucleation of layered double hydroxide (LDH), thus providing more active sites, which is more conduciveto CO2 adsorption. Herein, we reported alkali metal nitrates ((Li0.3Na0.18K0.52)NO3) promoted LDHand GO composites (LDH/GO) as adsorbents for CO2 capture. The influence of mass ratio of LDH to GO, theimpregnation ratio of alkali metal nitrates, the calcination and adsorption temperature, as well as thecycling stability were investigated systematically. The results indicated that the CO2 capture capacityof LDH/GO composite with 30 mol% (Li0.3Na0.18K0.52)NO3 could reach 4.51 mmol g 1, which was 5.86times higher than LDH/GO1 without loading alkali metal nitrates. Moreover, it had outstanding CO2adsorption capacity in the range from 200 C to 320 C. In addition, the cyclic adsorption and desorptiontest manifested that the CO2 uptake of the material can reach 3.07 mmol g 1 after 22 cycles. We believethat this study will give a significant contribution to fabrication of LDH based composites as CO2 adsorbentsin future study.
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