Related references
Note: Only part of the references are listed.
Article
Engineering, Chemical
Yixiong Lin et al.
Summary: Constructing open-cell foam with hierarchical pore structure can improve coke formation resistance in dry reforming of methane, providing a theoretical basis and technical guidance for designing and developing open-cell foam reactors.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Thermodynamics
Hangbin Zheng et al.
Summary: This paper demonstrates highly efficient and stable direct solar-driven thermochemical energy storage in fluidized reactors using (AlMgFeMn)OxCaCO3 pellets. The pellets showed excellent long-term stability and improved solar-thermal conversion efficiency compared to white (AlMg)OxCaCO3 pellets. The presence of poly-oxide (AlMgFeMn)Ox crystals and steam played a positive role in enhancing reaction kinetics and stability.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Chemistry, Physical
Yong-Jian Yang et al.
Summary: In order to counteract the effects of solar radiation fluctuation, phase change material (PCM) was employed in the solar volumetric reactor. A new design, SVR2, was proposed to address issues of high temperature, slow charging-discharging rate, and fluctuating methane conversion. Simulation results showed that SVR2 achieved a lower maximum temperature and higher methane conversion rate compared to the conventional SVR1 under natural solar radiation fluctuation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Green & Sustainable Science & Technology
Xuhang Shi et al.
Summary: To improve the energy conversion efficiency of solar to fuel, this study proposes a method of regulating radiative intensity to match energy conversion demand in solar methane dry reforming. The design of solar spots and biomimetic leaf hierarchical porous structures is optimized, resulting in a better radiative intensity field matching. Experimental and numerical studies show that by using this method, the methane conversion rate and solar thermochemical energy storage efficiency can be increased by 4.6% and 6.1%, respectively, achieving ideal synergy between real temperature field distribution and theoretical temperature requirement.
Article
Environmental Sciences
Guilong Dai et al.
Article
Nanoscience & Nanotechnology
Xinping Zhang et al.
Summary: Passive daytime radiative cooling (PDRC) is a zero-energy cooling technology that aims to reduce global fossil energy consumption and has gained significant interest. However, balancing the pursuit of ultrahigh dual-band optical properties and compatibility with multiple functional requirements remains a major challenge for PDRC.
Article
Engineering, Environmental
Hang Shi et al.
Summary: In this study, a novel strategy of direct photothermocatalytic CO2 reduction is proposed, achieving high-yield synthesis gas through a unique nanocomposite of ceria-coated Ni-phyllosilicate nanotubes (Ni-psnts@CeO2). The strategy demonstrated record-high solar-to-fuel efficiency (36.9%) and high production rates of H2 and CO (120.90 and 136.84 mmol gcat min-1) with a high CO2 conversion rate (90.4%) close to the thermodynamic limit. Additionally, the nanocomposite exhibited excellent long-term durability with a low carbon deposition rate (1.3 x 10-4 gc gcat h-1) under UV-vis-IR irradiation for 100 hours, indicating its potential for solar-driven CO2-to-fuel conversion.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Xin-Yuan Tang et al.
Summary: This study presents an integrated design method for improving the performance and safety of solar thermochemical reactors by optimizing the solar radiation distribution. The optimized energy distribution enhances energy conversion and reduces reaction temperature, leading to improved reactor performance under different operating conditions. The secondary concentrator design further enhances reactor performance and maintains stability.
Article
Thermodynamics
Ji-Long Yao et al.
Summary: Solar thermochemical methane dry reforming process has potential for energy storage. Current researches mainly focus on developing efficient catalysts and optimizing solar reactor operation, but there is still a lack of research on comparing different reactor structures and optimization strategies for chemical conversion process improvement. In this study, a three-dimensional optical-CFD model is established to investigate the effects of reactor structure design, catalyst distribution, and thermal conductivity on methane dry reforming. The results show that cylindrical porous foam reactor has higher efficiency and better conversion performance. Catalyst distribution significantly affects reactor performance and adjusting catalyst distribution can improve it. Heat transfer ability of the absorber affects temperature gradient but has little effect on the conversion. Relative position of solar reactor influences light propagation and reaction process. These findings provide valuable references for future high-temperature solar thermochemical reactor studies.
ENERGY CONVERSION AND MANAGEMENT
(2023)
Article
Thermodynamics
Xue Chen et al.
Summary: A pore-scale flow and heat transfer model is developed to investigate the thermal and hydrodynamic performance of a volumetric solar receiver under highly concentrated irradiation. Three-dimensional simulations are conducted based on the Weaire-Phelan structure modeling an open-cell ceramic foam absorber. The study predicts and compares the energy conversion characteristics of two ceramic materials (SiC and Al2O3). Various control approaches for the optical property of the solar absorber are introduced and analyzed. Results show that SiC absorber outperforms Al2O3 absorber and the optical property of the absorber front region significantly affects overall performance. Decreasing absorptivity and spectral selective design have positive impacts, with spectral selective improvement showing the highest effectiveness. Additionally, adding a porous fused silica as the front absorber layer effectively shifts the high-temperature area inward with a slight decrement in efficiency, and honeycomb structure exhibits advantages over foam silica.
Article
Thermodynamics
Xiu-Li Liu et al.
Summary: The energy conversion efficiency of thermophotovoltaic (TPV) cells was studied under different spectral energy and a test system was designed to evaluate its performance. The spectral energy transfer and temperature of primary devices were analyzed using Monte Carlo ray tracing and finite volume method. Results showed that the energy transfer efficiency of the newly designed test system was above 14%. The design efficiency of the testing system varied with the temperature of the radiation source, ranging from 14.11% to 14.87%. The energy conversion efficiency of the GaSb cell was 20.37% and 22.85% for radiation source temperatures of 2000 K and 2500 K, respectively. This work provides theoretical guidance for developing a quasi-monochromatic and high-energy flow thermophotovoltaic test system.
APPLIED THERMAL ENGINEERING
(2023)
Article
Engineering, Environmental
Hao-Ye Zheng et al.
Summary: Structural design and optimization play a crucial role in enhancing the performance of solar reactors. A coupled optics-CFD model was developed to study the impact of structural parameters on the photothermal chemical conversion process in a solar methane dry reforming reactor. The results provide valuable guidance for the design and optimization of solar-type reactors.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Xuhang Shi et al.
Summary: This study proposes the idea of regulating the radiation field to match the solar thermochemical energy conversion on-demand, and introduces a biomimetic hierarchical porous structure as a solar thermochemical reactor to improve the conversion efficiency.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Multidisciplinary Sciences
Remo Schappi et al.
Summary: This article discusses the potential of using solar-driven thermochemical processes to produce carbon-neutral transportation fuels by capturing H2O and CO2 from the atmosphere. This method can be effectively implemented in desert regions and has been tested on a pilot scale.
Article
Chemistry, Multidisciplinary
Rungsima Yeetsorn et al.
Summary: This study investigates the manufacture of ceramic foam catalyst supports using a polymeric sponge replica process and polymer foams as a template. The cell architectures of polyurethane and polyvinyl alcohol foams are suitable for catalyst support preparation. The rheology of catalyst solution, polymer decomposition rate, and sintering rate greatly affect the characteristics of ceramic foam catalysts.
Article
Thermodynamics
Jia-Qi Li et al.
Summary: This study analyzed the effect of edge layers on the volumetric radiative properties of open-cell nickel foam. Pore-scale simulation was conducted to examine the ligament morphology and optical properties of the foam samples. The results showed that at least three foam cells are required to accurately characterize volumetric radiative transfer. Additionally, the presence of edge layers led to underestimation of extinction coefficients and potential overestimation of scattering coefficients. The scattering albedos approached the reflectivity of the nickel component, indicating a predominantly backward scattering behavior.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Green & Sustainable Science & Technology
J. F. Lu et al.
Summary: The thermochemical energy storage performance of methane reforming with carbon dioxide in a cavity reactor under a concentrated sun simulator has been studied both experimentally and numerically. A novel catalyst bed structure with Ni/Al2O3 particles and perforated quartz encapsulation is proposed, which allows for high bed temperature and greenhouse effect, resulting in high chemical energy storage efficiency and total energy utilization efficiency of up to 41.1% and 80.3%, respectively.
Article
Thermodynamics
Zhihong Wu et al.
Summary: This study investigated the effect of different diameter distribution of particles on methane steam reforming in a packed bed reactor using the equivalent medium method. The results showed that optimizing the diameter distribution of variable particles in radial and axial direction can significantly improve the efficiency of the packed bed reactor.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Green & Sustainable Science & Technology
Bingzheng Wang et al.
Summary: This study proposes a novel system that integrates PV modules and membrane reactors via spectral splitting technology to improve the efficiency of solar energy utilization for co-generating fuels and electricity. The system achieves high energy efficiency, increased PV efficiency, reduced temperature, and high methane conversion rate. This has important implications for future solar energy utilization.
Article
Thermodynamics
Haodong Huang et al.
Summary: Solar thermochemical water splitting is an efficient method to convert solar energy into renewable fuels. This study developed a multi-physical model to analyze the dynamic behavior of the reactor under varying solar irradiations. Two control strategies were proposed to alleviate the negative effect of decreased direct normal irradiation (DNI) on the reactor efficiency.
ENERGY CONVERSION AND MANAGEMENT
(2022)
Article
Materials Science, Multidisciplinary
Xinping Zhang et al.
Summary: This study proposes the concept of utilizing biomimetic beetle cuticle structure for efficient radiative regulation and presents a low-cost biomimetic radiative cooling glass. The glass achieves multi-band spectral regulation, high transparency, esthetics, and energy conservation.
ADVANCED OPTICAL MATERIALS
(2022)
Article
Chemistry, Physical
Meng Lin et al.
Summary: This study introduced an integrated reactor concept for high-temperature electrolysis to convert concentrated solar energy into fuels and chemical feedstock. Experimental results suggested that endothermal operation can improve performance and predict promising solar-to-hydrogen efficiency.
Article
Engineering, Chemical
Huanhao Chen et al.
Summary: A new Ni@S1-SiC catalyst prepared using a one-pot method showed significantly improved anti-sintering and anti-coking performance in dry reforming of methane, with high CO2/CH4 conversions and H2/CO molar ratios. The catalyst exhibited high stability, low pressure drop, and excellent anti-sintering and anti-coking abilities due to the combination of zeolite encapsulated Ni catalysts and SiC foam.
Article
Energy & Fuels
Shen Du et al.
Summary: A porous volumetric solar receiver using molten salt as the heat transfer fluid shows higher thermal efficiency compared to traditional air receivers, with a 9.6% improvement at an outlet temperature of 1000 K. The molten salt receiver has a large heat storage capacity and efficient convective heat transfer, requiring a smaller mass flow rate and resulting in significantly smaller pressure drop. Additional research on this type of receiver is outlined for experimental verification and application with high temperature molten salt.
Article
Engineering, Chemical
Yixiong Lin et al.
Summary: By investigating the hierarchical structure-performance relationship in dry reforming of methane, the effects of hierarchical pore geometrical parameters on coke formation and catalytic performance were studied, providing insights into the deactivation and reaction-diffusion mechanism of the catalyst. Competitive relationship between heterogeneous reaction and intraparticle diffusion was utilized to identify optimal values for defining hierarchical pore structure, leading to maximum catalytic performance and coking resistance under specific reaction conditions.
CHEMICAL ENGINEERING SCIENCE
(2021)
Article
Chemistry, Physical
Zahra Taherian et al.
Summary: In this study, the addition of samarium to Ni catalyst through impregnation method successfully decreased the average Ni crystallite size and specific surface area, resulting in improved catalytic activity, enhancing the methane dry reforming process.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Applied
Zhige Zhang et al.
Summary: By modifying the catalyst structure, a Ni-La2O3/SiC-foam nanocomposite catalyst with enhanced performance was successfully prepared, significantly improving the methane and carbon dioxide conversion rates, while also exhibiting stronger resistance to coke deposition and Ni sintering.
FUEL PROCESSING TECHNOLOGY
(2021)
Article
Chemistry, Physical
Ziming Cheng et al.
Summary: This study proposes a novel approach using biomimetic wrinkle structure combined with optimized particles to achieve efficient optical property regulation in radiative cooling materials. The large-scale radiative cooling coating demonstrated high reflectance of solar irradiance and high emissivity in the atmospheric window band. Outdoor-building tests confirmed significant reductions in indoor air temperature and energy-saving rates exceeding 50% when using the coating.
Article
Thermodynamics
Jikang Wang et al.
Summary: A new high-flux solar simulator (HFSS) was designed to achieve good compromise between flux uniformity and peak flux. Error and sensitivity analysis confirmed the feasibility of the HFSS, showing that the system performance can meet the experimental requirements.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Qiuling Zhao et al.
Summary: The study proposes a solar thermochemical system integrating a parabolic trough solar collector and a membrane reactor for dry reforming of methane, achieving high-purity hydrogen production at a lower reaction temperature. The system exhibits high first-law thermodynamic efficiency and solar-to-fuel efficiency, showcasing efficient utilization of methane exergy for solar energy storage and hydrogen generation with negative CO2 emissions.
ENERGY CONVERSION AND MANAGEMENT
(2021)
Article
Chemistry, Physical
Ya-Xin Yu et al.
Summary: Dry methane reforming (DMR) is a promising technique that aims to convert greenhouse gases into useful chemical feedstocks. By analyzing catalytic activity trends and screening alloy catalysts, it may help address the issue of greenhouse gas conversion.
Article
Energy & Fuels
Xianglei Liu et al.
Summary: The use of NiCo alloy catalyst enables efficient solar-driven CO2 conversion with high light-to-fuel efficiency, attributing to photo-enhanced reactant activation and synergistic catalysis to inhibit carbon formation.
Review
Energy & Fuels
Rattanvir Singh et al.
BIOMASS CONVERSION AND BIOREFINERY
(2020)
Article
Energy & Fuels
Hao Zhang et al.
Article
Engineering, Multidisciplinary
Du Shen et al.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2020)
Article
Chemistry, Physical
Zelin Wang et al.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2020)
Article
Chemistry, Physical
Xinhe Wang et al.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2020)
Article
Green & Sustainable Science & Technology
Ziwei Li et al.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2020)
Article
Thermodynamics
Hao Zhang et al.
APPLIED THERMAL ENGINEERING
(2020)
Article
Thermodynamics
Yang Li et al.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2019)
Article
Energy & Fuels
Qiushi Wang et al.
Review
Chemistry, Physical
Yufei Zhao et al.
Article
Energy & Fuels
Jian Jin et al.
Article
Thermodynamics
Lee Muei Chng et al.
ENERGY CONVERSION AND MANAGEMENT
(2017)
Article
Thermodynamics
Yatao Ren et al.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2017)
Article
Energy & Fuels
Vincent M. Wheeler et al.
Article
Energy & Fuels
Jianfeng Lu et al.
Article
Thermodynamics
Fuqiang Wang et al.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2013)
Article
Energy & Fuels
Zhiyong Wu et al.
Article
Multidisciplinary Sciences
William C. Chueh et al.
Article
Energy & Fuels
T Kodama et al.