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Superhydrophobic ceramic membrane coupled with a biphasic solvent for efficient CO_(2)capture

Green Energy & Environment 2025年第4期10卷 834-844页

作者： Kaili Xue Zhen Chen Xiaona Wu Heng Zhang Haiping Chen Junhua Li State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing100084China Beijing Key Laboratory of Pollutant Monitoring and Control in Thermoelectric Production Process School of EnergyPower and Mechanical EngineeringNorth China Electric Power UniversityBeijing102206China MOE Key Laboratory of Resources and Environmental Systems Optimization College of Environmental Science and EngineeringNorth China Electric Power UniversityBeijing102206China

An innovative strategy was proposed by integration of membrane contactor(MC)with biphasic solvent for efficient CO_(2) capture from flue *** accessible fly ash-based ceramic membrane(CM)underwent hydrophobic modification through silane grafting,followed by fluoroalkylsilane decoration,to prepare the superhydrophobic membrane(CSCM).The CSCM significantly improved resistance to wetting by the biphasic solvent,consisting of amine(DETA)and sulfolane(TMS).Morphological characterizations and chemical analysis revealed the notable enhancements in pore structure and hydrophobic chemical groups for the modified *** of wetting/bubbling behavior based on static wetting theory referred the liquid entry pressure(LEP)of CSCM increased by 20 kPa compared to pristine *** with traditional amine solvents,the biphasic solvent presented the expected phase *** experiments demonstrated that the CO_(2) capture efficiency of the biphasic solvent increased by 7%,and the electrical energy required for desorption decreased by 32%.The 60-h continuous testing and supplemental characterization of used membrane confirmed the excellent adaptability and durability of the *** study provides a potential approach for accessing hydrophobic ceramic membranes and biphasic solvents for industrial CO_(2) capture.

关键词： Carbon capture Membrane contactor Hydrophobic modification Membrane wetting Biphasic solvent

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Design optimization for evaporation property of coal fly ash-based evaporator during solar-driven interfacial evaporation process

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Water Research 2025年 281卷

作者： Zhang, Zheng Chen, Can Chen, Pengyu Huang, Jiguang Zhang, Heng Gao, Dan Chen, Haiping School of Energy Power and Mechanical Engineering North China Electric Power University Beijing102206 China Beijing Key Laboratory of Pollutant Monitoring and Control in Thermoelectric Production Process North China Electric Power University Beijing102206 China National Institute of Energy Development Strategy North China Electric Power University Beijing China

Solar-driven interfacial evaporation has recently attracted many attentions due to its energy-saving and environmentally friendly advantages. Researches on structural parameters optimization for the ceramic interfacial evaporators to improve their evaporation performance are lack. In this work, ceramic evaporators with different structural parameters are prepared using coal fly ash as the main material. A comparative experimental study was carried out under natural light. Water transport rate and maximum water transport volume of evaporators are introduced to explain the effect of structural parameters on the evaporation performance. Results indicate that smaller pore size and higher porosity can enhance the water transport and improve the evaporation rate. Evaporators with higher porosity has higher maximum water transport volume, thus the evaporation rate can be reduced due to the increase of the thermal conductivity of the evaporator. The optimized evaporator shows a high average evaporation rate of 4.72 kg·m−2·h−1 under a solar irradiation of 0.66 kW·m−2, and an average evaporation rate of 5.85 kg·m−2·h−1 under one sun irradiation, with the mean pore size of 0.2204 μm and the porosity of 0.2855. This work provides a direction for structural parameters optimization in designing high-performance ceramic evaporators. © 2025 Elsevier Ltd

关键词： Pore size

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Coal fly ash based porous ceramic evaporator for highly efficient solar-driven seawater desalination

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Separation and Purification Technology 2025年 368卷

作者： Chen, Can Zhang, Zheng Chen, Pengyu Huang, Jiguang Zhang, Heng Gao, Dan Li, Tao Chen, Haiping School of Energy Power and Mechanical Engineering North China Electric Power University Beijing102206 China Beijing Key Laboratory of Pollutant Monitoring and Control in Thermoelectric Production Process North China Electric Power University Beijing102206 China National Institute of Energy Development Strategy North China Electric Power University Beijing China Jionto Energy Investment Co. Ltd. Hebei China

Solar-interfacial evaporation has shown great potential for desalination using green energy. However, salt accumulation and long-term stability of the evaporators are urgent problems. Here, we designed a ceramic interfacial evaporator using black glaze and coal fly ash (CFA) with durability and technological maturity characteristics. A porous CFA ceramic substrate was prepared by the dry pressing method, and the black glaze was coated on the surface as a photothermal material. The thermal conductivity and porosity of the CFA ceramic are 0.564 W·m−1 K−1 and 40 %, respectively. The average evaporation rate was 1.443 kg·m−2 h−1 under one sun. Outdoor solar desalination experiments were conducted. The highest evaporation rate was 2.949 kg·m−2 h−1 under natural sunlight. The ceramic evaporator showed good salt resistance during two days of continuous desalination experiments. This work highlights the feasibility of using CFA-based ceramic evaporators for efficient solar-driven seawater desalination. © 2025 Elsevier B.V.

关键词： Desalination

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Performance Prediction of Low-Concentration Photovoltaic Photothermal Components 3

Performance Prediction of Low-Concentration Photovoltaic Pho...

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3rd International Conference on Energy Engineering and Power Systems, EEPS 2023

作者： Zhang, Yong Cheng, Chao Zhao, Yang Zhang, Sicong Yuan, Zetong Li, Yutong Wang, Kun Zhang, Heng North China Electric Power University School of Energy Power and Mechanical Engineering Beijing China North China Electric Power University National Institute of Energy Development Strategy Beijing China State Grid Tianjin Electric Power Company Tianjin China North China Electric Power University Beijing Key Laboratory of Pollutant Monitoring and Control in Thermoelectric Production Process Beijing China

ISBN: (纸本)9798350313857

In this paper, there are two ways for the performance prediction of CPV/T components, heat transfer analysis and BP neural network, based on the nonlinearity of its performance fluctuation and the addition of heat transfer process, with the low-concentration photovoltaic photothermal complex utilization (LCPV/T) system as the research object. The comparison results show that both prediction methods show good prediction accuracy when the irradiance fluctuation is low, and the relative error is controlled within 10%;when the irradiation value fluctuates, the neural network prediction has higher prediction accuracy in some abnormal output determined by special experimental conditions, while the heat transfer analysis has higher overall prediction accuracy. Combining the advantages and disadvantages of both, the heat transfer analysis is suitable for component performance optimization, and the neural network is suitable for component performance prediction at longer time and space scales. © 2023 IEEE.

关键词： Neural networks

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Experimental Research on Enhancing Heat and Mass Transfer of Porous Ceramic Membrane with Acoustic Field

SSRN

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SSRN 2023年

作者： Yang, Jihao Li, Xiangsheng Zhang, Heng Chen, Haiping School of Energy Power and Mechanical Engineering North China Electric Power University Beijing102206 China Beijing Key Laboratory of Pollutant Monitoring and Control in Thermoelectric Production Process North China Electric Power University Beijing102206 China

Transport membrane condenser is a water heat recovery technology based on condensation mechanism. Limited by the price of ceramic membrane, it focuses on enhancing the heat and mass transfer technology of ceramic membrane. Acoustic enhancement of heat and mass transfer is an efficient enhancement method. In order to explore the heat and mass transfer characteristics of ceramic membrane enhanced by audible sound field under different condensation mechanisms, the corresponding experimental platform was built. The results show that due to the condensation characteristics of capillary condensation, the heat and mass transfer performance of the nanofilm under the action of sound field is greatly improved, with a maximum increase of 53.44% and 53.22%, respectively;This article presents an analysis of the economic advantages of utilizing acoustic waves in conjunction with ceramic membranes. It is found that the recovery period can be shortened by 3.2 years when acoustic waves are employed. The findings of this study offer a valuable foundation for improving heat and mass transfer in flue gas moisture recovery systems utilizing ceramic membranes. © 2023, The Authors. All rights reserved.

关键词： Acoustic fields

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Analysis of Pore Size control and Application of Ceramic Membrane Based on Particle Sintering Method

SSRN

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SSRN 2023年

作者： Zhou, Tian Xue, Kaili Zhang, Heng Chen, Haiping Li, Zhaohao School of Energy Power and Mechanical Engineering North China Electric Power University Beijing102206 China Beijing Key Laboratory of Pollutant Monitoring and Control in Thermoelectric Production Process North China Electric Power University Beijing102266 China

Ceramic membrane has the characteristics of high-temperature resistance, corrosion resistance, high separation efficiency, and low energy consumption, and has been widely used in many fields such as petroleum, the chemical industry, and food. The pore size has an important effect on the separation effect of the membrane. The separation mechanism of membranes with different pore sizes is different, and the application scenarios are also different. Solid-state particle sintering is a mature method for preparing ceramic microfiltration membranes. Compared with other methods, the solid-state particle sintering method has the advantages of convenient operation and strong controllability. In this study, the composite ceramic membrane with different pore size distributions was prepared by adjusting the pore size of the self-made support by the solid particle sintering method. During the experiment, the influence of preparation conditions on the structure and gas flux of the composite membrane was investigated, and the influence of inner coating and outer coating on the modification of the membrane pore size was analyzed from the theoretical point of view. The carbon capture performance of the prepared composite ceramic membrane was tested by using the self-built membrane absorption experimental platform. The experimental results show that the surface morphology, pore size, porosity, and air flux of the composite ceramic films will change with the change in preparation conditions. Compared with the outer coating, the inner coating of the composite ceramic membrane has better applicability. In the carbon capture test, the CO2 absorption efficiency can reach more than 90%. © 2023, The Authors. All rights reserved.

关键词： Pore size

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Simulation and 4e (Energy, Exergy, Economic and Environmental) Analysis of Photovoltaic/Thermal, Heat Pump, and Absorption Chiller Tri-Generation System

SSRN

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SSRN 2022年

作者： Yue, Han Xu, Zipeng Wang, Na Cheng, Chao Zhang, Heng Chen, Haiping Ai, Dengxin School of Energy Power and Mechanical Engineering North China Electric Power University Beijing102206 China National Institute of Energy Development Strategy North China Electric Power University Beijing102206 China Beijing Key Laboratory of Pollutant Monitoring and Control in Thermoelectric Production Process North China Electric Power University Beijing102206 China

Solar tri-generation system is widely applied to residential buildings energy supply for high efficiency, energy saving, low cost and environmental protection. In this paper, a solar tri-generation system with photovoltaic/thermal (PV/T), heat pump (HP) and absorption chiller is proposed to supply electricity, space heating and cooling for buildings. System model is established in TRNSYS software and one-year performance evaluation is made from energy, exergy, economic and environmental aspects. Moreover, a student dormitory located in Tianjin, China is set up by TRNBuild to measure the reliability of energy supply for building. The result revealed that system performed well in meeting load demand. The energy efficiency was 32.36%, and exergy efficiency was 16.35%. Moreover, payback period (PP) was 8.15 year while unit product exergy cost was 0.267CNY/kWh. The annual dioxide carbon was reducing about 127104.4kg. Also, increasing the area of PV/T effectively improved the profit of system within the limitation of actual roof area of building. This paper shows an effective method for comprehensive performance evaluation of PV/T-HP-AC system. © 2022, The Authors. All rights reserved.

关键词： Exergy

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Thermal Performance Analysis of Gas Turbine Combined Cycle Integrated Solar Collector

SSRN

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SSRN 2024年

作者： Huang, Baoda Zhang, Heng Huang, Jiguang Cheng, Chao Zhao, Chunhao Chen, Haiping Gao, Dan School of Energy Power and Mechanical Engineering North China Electric Power University Beijing102206 China Beijing Key Laboratory of Pollutant Monitoring and Control in Thermoelectric Production Process North China Electric Power University Beijing102206 China National Institute of Energy Development Strategy North China Electric Power University Beijing102206 China

The problems of inefficient operation under partial load and insufficient peaking capacity of gas turbine grow with the proportion of unstable renewable energy sources increasing in power system. An integrated solar collector-inlet air heating gas turbine combined cycle system is proposed in this work to improve the efficiency and peaking range. In the system, a parabolic trough solar collector is integrated with the heat recover steam generator in the gas turbine combined cycle, which can promote the thermoelectric decoupling capability. The exhaust gas from the tail end of the heat recover steam generator is reused to heat the inlet air of compressor. Thermal performances and thermoelectric feasible region of the system are investigated. Results show that both the thermal efficiency and the exergy efficiency are improved with the increase of the inlet air temperature and the solar energy input. The peaking range is widened by 10.44% and the lower limit of the peaking load is reduced by 11.24%. This work provides an effective method to achieve efficient and flexible operation of gas turbines. © 2024, The Authors. All rights reserved.

关键词： Solar energy

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Performance Prediction of Low-Concentration Photovoltaic Photothermal Components

Performance Prediction of Low-Concentration Photovoltaic Pho...

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Energy Engineering and Power Systems (EEPS), International Conference on

作者： Yong Zhang Chao Cheng Yang Zhao Sicong Zhang Zetong Yuan Yutong Li Kun Wang Heng Zhang School of Energy Power and Mechanical Engineering North China Electric Power University Beijing China National Institute of Energy Development Strategy North China Electric Power University Beijing China State Grid Tianjin Electric Power Company Tianjin China Beijing Key Laboratory of Pollutant Monitoring and Control in Thermoelectric Production Process North China Electric Power University Beijing China

In this paper, there are two ways for the performance prediction of CPV/T components, heat transfer analysis and BP neural network, based on the nonlinearity of its performance fluctuation and the addition of heat transfer process, with the low-concentration photovoltaic photothermal complex utilization (LCPV/T) system as the research object. The comparison results show that both prediction methods show good prediction accuracy when the irradiance fluctuation is low, and the relative error is controlled within 10%; when the irradiation value fluctuates, the neural network prediction has higher prediction accuracy in some abnormal output determined by special experimental conditions, while the heat transfer analysis has higher overall prediction accuracy. Combining the advantages and disadvantages of both, the heat transfer analysis is suitable for component performance optimization, and the neural network is suitable for component performance prediction at longer time and space scales.

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