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You searched for: Journal name Applied energy Remove constraint Journal name: Applied energy Subject term calcium Remove constraint Subject term: calcium Text availability Citation in PubAg Remove constraint Text availability: Citation in PubAg
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1. Experimental investigation of a novel mechanically fluidized bed reactor for thermochemical energy storage with calcium hydroxide/calcium oxide

Author:
Kai Risthaus; Marc Linder; Matthias Schmidt
Source:
Applied energy 2022 v.315 pp. 118976
ISSN:
0306-2619
Subject:
calcium; calcium oxide; energy; enthalpy; fluidized beds; heat transfer; heat transfer coefficient; mass transfer; thermal conductivity
Abstract:
... The reaction system based on the reversible hydration of CaO is promising for thermochemical energy storage since the material is a non-toxic, cheap industrial mass product with a comparatively high reaction enthalpy. However, the fine cohesive powder has a low thermal conductivity as well as a limited flowability and is not easily fluidized. Therefore, a reactor realization is challenging especia ...
DOI:
10.1016/j.apenergy.2022.118976

2. Formation Damage of Sandstone Geothermal Reservoirs: During Decreased Salinity Water Injection

Author:
Rukuan Chai; Yuetian Liu; Liang Xue; Ray Zhenhua Rui; Ruicheng Zhao; Jingru Wang
Source:
Applied energy 2022 pp. 119465
ISSN:
0306-2619
Subject:
X-ray diffraction; atomic absorption spectrometry; calcium; clay; condensates; contact angle; corrosion; energy; equipment; hardness; modulus of elasticity; nuclear magnetic resonance spectroscopy; permeability; plagioclase; quartz; salinity; sandstone; shrinkage; strength (mechanics); surface water; water flow
Abstract:
... Water reinjection was widely implemented in the geothermal development for not only disposing tailwater but also maintaining reservoir pressure. Accompanying this was the formation damage, especially in the injection of decreased salinity water which was synthesized by adding surface water and condensed water into produced water for inhibiting the process equipment corrosion, treating the cooling ...
DOI:
10.1016/j.apenergy.2022.119465

3. Long-term effects of ilmenite on a micro-scale bubbling fluidized bed combined heat and power pilot plant for oxygen carrier aided combustion of wood

Author:
T. Schneider; J. Moffitt; N. Volz; D. Müller; J. Karl
Source:
Applied energy 2022 v.314 pp. 118953
ISSN:
0306-2619
Subject:
biomass; calcium; carbon monoxide; combustion; energy; fluidized beds; heat; magnesium; oxygen; potassium; power plants; titanium dioxide; wood
Abstract:
... Small-scale solutions for the application of solid biomass fuels for the generation of heat and power with fluidized beds are hardly available. The main issues comprise agglomeration and slagging, incomplete burnout of combustibles and low efficiencies. During so-called oxygen carrier aided combustion, an oxygen carrier replaces the conventional bed material and balances the local and temporal oxy ...
DOI:
10.1016/j.apenergy.2022.118953

4. Redox cycle of calcium manganite for high temperature solar thermochemical storage systems

Author:
Qi Lei; Qianli Si; Ji Zhang; Yifeng Jiang; Long Hu; Liang Qiao; Xiaotao Zu; Gang Xiao; Jack Yang; Sean Li
Source:
Applied energy 2022 v.305 pp. 117958
ISSN:
0306-2619
Subject:
calcium; cost effectiveness; energy conservation; energy conversion; heat; mass flow; power generation; solar thermal energy; temperature
Abstract:
... Thermochemical energy storage via metal oxide redox cycling is a potential cost-effective approach to store solar energy both chemically and thermally at high temperatures, enabling efficient solar thermal power production round-the-clock and on-demand. Perovskite manganites are a low-cost redox material that undergoes reversible reaction without side reactions up to 1000 °C and offers high storag ...
DOI:
10.1016/j.apenergy.2021.117958

5. Effective Ca2+-doping in Sr1-xCaxFeO3-δ oxygen carriers for chemical looping air separation: A theoretical and experimental investigation

Author:
Ting Jia; Eric J. Popczun; Jonathan W. Lekse; Yuhua Duan
Source:
Applied energy 2021 v.281 pp. 116040
ISSN:
0306-2619
Subject:
air; calcium; density functional theory; energy; iron; oxygen; thermogravimetry
Abstract:
... Perovskite iron oxides are promising oxygen carrying materials due to their effectiveness and the low cost of iron. The effect of Ca²⁺ doping on oxygen ion diffusion in Sr₁₋ₓCaₓFeO₃₋δ (x = 0, 0.125, 0.25, 0.375, 0.5) is investigated by combining density functional theory (DFT) calculations and experimental measurements. The oxygen ion diffusion is determined by two key factors of oxygen vacancy fo ...
DOI:
10.1016/j.apenergy.2020.116040

6. Highly Selective Production of Syngas from Chemical Looping Reforming of Methane with CO2 Utilization on MgO-supported Calcium Ferrite Redox Materials

Author:
Vedant Shah; Zhuo Cheng; Deven S. Baser; Jonathan A. Fan; Liang-Shih Fan
Source:
Applied energy 2021 v.282 pp. 116111
ISSN:
0306-2619
Subject:
calcium; carbon dioxide; density functional theory; energy; ferrimagnetic materials; methane; oxidation; oxygen; synthesis gas; thermodynamics; value added
Abstract:
... Chemical looping reforming with CO₂ splitting (CLRS) is an attractive process that can be used for conversion of hydrocarbons into syngas, an industrially important intermediate that serves as a building block for other value-added products. Under the chemical looping approach, the oxygen carrier that provides lattice oxygen, instead of molecular oxygen, is used for methane partial oxidation. This ...
DOI:
10.1016/j.apenergy.2020.116111

7. Increasing energy efficiency in chemical looping combustion of methane by in-situ activation of perovskite-based oxygen carriers

Author:
Arturo Cabello; Alberto Abad; Pilar Gayán; Francisco García-Labiano; Luis F. de Diego; Juan Adánez
Source:
Applied energy 2021 v.287 pp. 116557
ISSN:
0306-2619
Subject:
calcium; combustion efficiency; energy efficiency; fuel combustion; manganese; methane; oxygen
Abstract:
... CaMnO₃-based perovskites are attractive for use as oxygen carriers in chemical looping combustion (CLC) because they are made from cheap materials (manganese, calcium). However, these materials show low reactivity with methane, and high oxygen carrier-to-fuel ratios (ϕ) are required to achieve complete fuel combustion. It is believed that energy efficiency in the chemical looping process would be ...
DOI:
10.1016/j.apenergy.2021.116557

8. Low calcium dosage favors methanation of long-chain fatty acids

Author:
Yang Liu; Pinjing He; Haowen Duan; Liming Shao; Fan Lü
Source:
Applied energy 2021 v.285 pp. 116421
ISSN:
0306-2619
Subject:
Syntrophomonas; anaerobic digestion; calcium; calcium carbonate; calcium phosphates; carbon; energy; metagenomics; methane; methane production; prediction; solid wastes; wastewater
Abstract:
... Anaerobic digestion of fats, oils, and greases is a desirable approach to recover methane from wastewater and solid waste. However, the efficiency and stability are unsatisfying owing to the difficulty in long-chain fatty acids (LCFAs) methanation. To make matters worse, LCFAs easily form precipitate with Ca²⁺, which would further reduce the stability of anaerobic digestion. Therefore, to determin ...
DOI:
10.1016/j.apenergy.2020.116421

9. A numerical modeling study on the influence of porosity changes during thermochemical heat storage

Author:
Gabriele Seitz; Rainer Helmig; Holger Class
Source:
Applied energy 2020 v.259 pp. 114152
ISSN:
0306-2619
Subject:
calcium; calcium oxide; energy; heat; mathematical models; permeability; porosity; prediction; storage time
Abstract:
... Thermochemical energy storage can achieve high storage densities as well as nearly loss-free long-term storage, while offering charge or discharge on demand. Suitable materials consist of solid and gaseous components, where the dosage of reacting gas in the reactor can easily be regulated to control the reaction. Most materials currently investigated for thermochemical heat storage feature a volum ...
DOI:
10.1016/j.apenergy.2019.114152

10. Advanced power cycles for coal-fired power plants based on calcium looping combustion: A techno-economic feasibility assessment

Author:
Sebastian Michalski; Dawid P. Hanak; Vasilije Manovic
Source:
Applied energy 2020 v.269 pp. 114954
ISSN:
0306-2619
Subject:
calcium; carbon dioxide; carbon sequestration; coal; combustion; electricity costs; emissions; helium; nitrogen; power generation; power plants; steam; thermodynamics; xenon
Abstract:
... Carbon capture and storage is crucial to decarbonising the power sector, as no other technology can significantly reduce emissions from fossil fuel power generation systems. Yet, the mature CO₂ capture technologies result in net efficiency penalties of at least 7% points. Emerging technologies, such as calcium looping combustion, can reduce the net efficiency penalty to 2.4% points. Further reduct ...
DOI:
10.1016/j.apenergy.2020.114954

11. Effects of various occurrence modes of inorganic components on the emissions of PM10 during torrefied biomass combustion under air and oxy-fuel conditions

Author:
Wenyu Wang; Chang Wen; Tianyu Liu; Changkang Li; Lichun Chen; Jianqun Wu; Yuhao Shao; Enze Liu
Source:
Applied energy 2020 v.259 pp. 114153
ISSN:
0306-2619
Subject:
Salix; aerodynamics; air; biochar; biomass; calcium; calcium oxide; catalytic activity; chlorine; coagulation; combustion; emissions; furnaces; minerals; particulates; potassium; potassium chloride; potassium sulfate; silicates; sulfur; washing; water solubility; wheat
Abstract:
... In order to control PM₁₀ (of an aerodynamic diameter of 10 μm or less) emissions from biochar combustion, the effects of various occurrence modes of inorganic components on PM₁₀ formation are investigated. Two typical biochars (torrefied willow and wheat) were processed through sequential extraction procedures followed by combustion experiments in a high-temperature drop-tube furnace at 1400 °C. T ...
DOI:
10.1016/j.apenergy.2019.114153

12. Enhanced performance of copper ore oxygen carrier by red mud modification for chemical looping combustion

Author:
Zhenhua Gu; Ling Zhang; Chunqiang Lu; Shan Qing; Kongzhai Li
Source:
Applied energy 2020 v.277 pp. 115590
ISSN:
0306-2619
Subject:
activation energy; aluminum; calcium; combustion; energy; industry; kinetics; methane; oxidative stability; oxygen; wastes
Abstract:
... Copper ore has been considered as a promising low-cost oxygen carrier candidate for chemical looping combustion (CLC) due to its high reactivity, but pure Cu ore suffers from serious deactivation during long term redox cycling. The present work proposes to combine Cu ore with red mud, an abundant polluting waste of aluminum industry, to improve the reactivity and stability of Cu ore for CLC of met ...
DOI:
10.1016/j.apenergy.2020.115590

13. Novel bio-based phase change materials with high enthalpy for thermal energy storage

Author:
Lu Liu; Xiaoqiao Fan; Yuang Zhang; Shufen Zhang; Wentao Wang; Xin Jin; Bingtao Tang
Source:
Applied energy 2020 v.268 pp. 114979
ISSN:
0306-2619
Subject:
biocompatibility; biocomposites; calcium; enthalpy; insulating materials; latent heat; moieties; phase transition; polyethylene glycol; sodium alginate; storage technology; supply balance; thermal energy
Abstract:
... Phase change thermal storage technology is an effective approach to solving the mismatch between energy supply and demand. However, this technique requires considerable efforts to the successful application and popularization. In view of designing form-stable phase change materials (PCMs) with desirable latent heat enthalpy. We reported novel and eco-friendly PCMs via a simple and convenient metho ...
DOI:
10.1016/j.apenergy.2020.114979

14. Thermochemical energy storage performance of Al2O3/CeO2 co-doped CaO-based material under high carbonation pressure

Author:
Hao Sun; Yingjie Li; Xianyao Yan; Jianli Zhao; Zeyan Wang
Source:
Applied energy 2020 v.263 pp. 114650
ISSN:
0306-2619
Subject:
aluminum oxide; calcium; calcium carbonate; calcium oxide; carbonation; catalytic activity; ceric oxide; cerium; energy; ions; limestone; oxygen; power plants; solar energy; surface area; synthetic products; temperature
Abstract:
... The calcium looping energy storage is a promising technique for thermochemical energy storage in concentrated solar power plants. Nevertheless, natural CaO-based materials, such as limestone, have an obvious decline in energy storage capacity during cyclic CaO/CaCO₃ energy storage. In this work, a novel Al₂O₃/CeO₂ co-doped CaO-based material for energy storage is synthesized by a wet-mixing method ...
DOI:
10.1016/j.apenergy.2020.114650

15. A calcium looping process for simultaneous CO2 capture and peak shaving in a coal-fired power plant

Author:
Linfei Zhou; Lunbo Duan; Edward John Anthony
Source:
Applied energy 2019 v.235 pp. 480-486
ISSN:
0306-2619
Subject:
byproducts; calcium; carbon dioxide; coal; combustion; energy; flue gas; heat; methane; oxygen; oxygen production; power plants; China
Abstract:
... CO2 capture and peak shaving are two of the main challenges for coal-fired power plants in China. This paper proposed a calcium looping (CaL) combustion system with cryogenic O2 storage for simultaneous flue gas decarbonization and peak shaving for a 1000 MWe coal-fired power plant. The philosophy of this concept is that: (1) the boiler always operates at maximum continuous rating (MCR) to ensure ...
DOI:
10.1016/j.apenergy.2018.10.138

16. Co-Hydrothermal Carbonization of Polyvinyl Chloride and Moist Biomass to Remove Chlorine and Inorganics for Clean Fuel Production

Author:
Neng Huang; Peitao Zhao; Sudip Ghosh; Alexander Fedyukhin
Source:
Applied energy 2019 pp. -
ISSN:
0306-2619
Subject:
Pinus; absorption; acidity; aluminum; biofuels; biomass; calcium; carbonization; chlorine; coal; dechlorination; fuel production; heat; hydrochars; iron; magnesium; mass transfer; mixing; moieties; particle size; poly(vinyl chloride); porosity; potassium; sawdust; sodium; temperature; wastes
Abstract:
... This work proposes an innovative integrated process to produce clean solid biofuel from chlorinated wastes and polyvinyl chloride (PVC). The PVC and pinewood sawdust were used as parent materials. We studied the effect of parameters such as the hydrothermal temperature, the residence time and the particle size (PS) of the sawdust on the dechlorination efficiency (DE), the inorganics removal effici ...
DOI:
10.1016/j.apenergy.2019.02.050

17. Evaluating the Potential for Bio-fuel Upgrading: A Comprehensive Analysis of Bio-crude and Bio-residue from Hydrothermal Liquefaction of Agricultural Biomass

Author:
Rishav Chand; Venu Babu Borugadda; Michael Qiu; Ajay K Dalai
Source:
Applied energy 2019 pp. -
ISSN:
0306-2619
Subject:
ambient temperature; ash content; biodiesel; biomass; calcium; canola meal; carbon; ethyl acetate; heat; hydrothermal liquefaction; mica; nitrogen; oxidative stability; oxygen; petroleum; porosity; quartz; solvents; sulfur; surface area; tetrahydrofuran; wastes; wheat flour
Abstract:
... In the present study, three different solvents – ethyl acetate, tetrahydrofuran and petroleum ether – were used to extract bio-crude from a hydrothermal liquefaction product mixture obtained from canola meal and waste wheat flour. The bio-crude yields and the ease of extraction were compared for each of the solvents to evaluate the efficacy of the solvent-extraction process and to determine the mo ...
DOI:
10.1016/j.apenergy.2019.113679

18. High-performance and low-cost macroporous calcium oxide based materials for thermochemical energy storage in concentrated solar power plants

Author:
Pedro E. Sánchez Jiménez; Antonio Perejón; Mónica Benítez Guerrero; José M. Valverde; Carlos Ortiz; Luis A. Pérez Maqueda
Source:
Applied energy 2019 v.235 pp. 543-552
ISSN:
0306-2619
Subject:
acetates; acetic acid; calcium; calcium oxide; carbonation; coatings; cost effectiveness; energy; energy density; magnesium; magnesium oxide; minerals; nanoparticles; porous media; power plants; solar energy; solvents; thermal degradation
Abstract:
... High energy density, cycling stability, low cost and scalability are the main features required for thermochemical energy storage systems to achieve a feasible integration in Concentrating Solar Power plants (CSP). While no system has been found to fully satisfy all these requirements, the reversible CaO/CaCO3 carbonation reaction (CaL) is one of the most promising since CaO natural precursors are ...
DOI:
10.1016/j.apenergy.2018.10.131

19. Performance enhancement of bromide salt by nano-particle dispersion for high-temperature heat pipes in concentrated solar power plants

Author:
Yaxuan Xiong; Zhenyu Wang; Yuting Wu; Peng Xu; Yulong Ding; Chun Chang; Chongfang Ma
Source:
Applied energy 2019 v.237 pp. 171-179
ISSN:
0306-2619
Subject:
calcium; heat transfer; lithium; melting point; nanoparticles; phase transition; pipes; potassium bromide; power plants; scanning electron microscopy; silica; sodium bromide; solar energy; temperature; thermal stability
Abstract:
... Thermal performance of molten salts can be enhanced by nanostructured materials, which can enhance the heat transfer capacity of heat pipes and further improve the global efficiency of Concentrated Solar Power plants. In this work, a eutectic mixture of sodium bromide, potassium bromide, lithium bromide and calcium bromide acted as the base salt, into which nine SiO2 nanoparticles in three diamete ...
DOI:
10.1016/j.apenergy.2019.01.026

20. Reactivity and deactivation mechanisms of pyrolysis chars from bio-waste during catalytic cracking of tar

Author:
Maxime Hervy; Elsa Weiss-Hortala; Doan Pham Minh; Hadi Dib; Audrey Villot; Claire Gérente; Sarah Berhanu; Anthony Chesnaud; Alain Thorel; Laurence Le Coq; Ange Nzihou
Source:
Applied energy 2019 v.237 pp. 487-499
ISSN:
0306-2619
Subject:
Fourier transform infrared spectroscopy; active sites; benzene; calcium; carbon dioxide; catalysts; catalytic activity; catalytic cracking; cracking; ethylbenzene; food waste; melting; models; pallets; phosphorus; physicochemical properties; porosity; porous media; potassium chloride; pyrolysis; scanning electron microscopy; sludge; sodium chloride; steam; surface area; synthesis gas; temperature; wood
Abstract:
... The catalytic activity of pyrolysis chars from bio-waste was investigated for the cracking of model tar compounds (ethylbenzene and benzene). Two pyrolysis chars were produced at 700 °C from (1) used wood pallets (UWP), and (2) a 50/50 dry% mixture of food waste (FW) and coagulation-flocculation sludge (CFS). Steam activation at 850 °C was used to study the influence of the porous structure. While ...
DOI:
10.1016/j.apenergy.2019.01.021