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Hydrogen sulfide removal by copper sulfate circulation method
Yingwu Yin,Ge Yan,Huichao Weng,Jiaqi Yang,Weichao Bao,Yuxing Gao 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.8
Although copper sulfate (CuSO4) as a valuable desulfurizer is commonly used in the laboratory, it is not applied in industry due to its high cost and lack of practical regeneration method. In this study, a method for regeneration of the absorption product copper sulfide (CuS) under mild conditions is put forward. In the presence of sodium chloride (NaCl), CuSO4 could be regenerated smoothly in acid solution and be recycled for the absorption of hydrogen sulfide (H2S). Specifically, under the conditions of 0.30mol/L chloride ion (Cl−), 1.8% acidity at 323 K, for 5.5 h, the regeneration efficiency will be higher than 99%. Moreover, extensive experimental studies showed that the addition of Cl− would not observably influence the absorption efficiency of H2S. These results reveal the potential for developing a novel, efficient and low-cost desulfurization technology.
The Impact of Line Resistance on Load Sharing and An Improved Droop Control of DC Microgrid
CAO Wei,YANG Daopei,CAO Jialin,WANG Yongzhi,YAN Yuxing 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
This paper proposes an effective DC voltage and power sharing droop control structure for DC microgrid based on public bus voltage feedback signal. Firstly, the impact of the line resistance on power sharing among droop controlled distributed generators is analyzed and the reason why the line resistance cannot be ignored is presented. Then, an improved droop control is proposed. The simulation test based on MATLAB/Simulink was implemented to demonstrate the proposed approach.