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You searched for: Journal name Applied energy Remove constraint Journal name: Applied energy Publication year rev 7982-2018 Remove constraint Publication year rev: 7982-2018 Subject term calcium Remove constraint Subject term: calcium
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1. CO2 capture performance of calcium-based synthetic sorbent with hollow core-shell structure under calcium looping conditions

Author:
Xiaotong Ma; Yingjie Li; Lunbo Duan; Edward Anthony; Hantao Liu
Source:
Applied energy 2018 v.225 pp. 402-412
ISSN:
0306-2619
Subject:
aluminum oxide; calcium; calcium oxide; carbon; carbon dioxide; cement; density functional theory; energy; glucose; industrial wastes; limestone; microparticles; models; slags; sorbents; temperature
Abstract:
... A novel calcium-based synthetic CO₂ sorbent with hollow core-shell structure was prepared by a carbon microsphere template route where carbide slag, alumina cement and glucose were employed as the low-cost calcium precursor, support and carbon source, respectively. The effects of the alumina cement addition, the pre-calcination temperature during the preparation process, the carbon template additi ...
DOI:
10.1016/j.apenergy.2018.05.008

2. From waste to high value utilization of spent bleaching clay in synthesizing high-performance calcium-based sorbent for CO2 capture

Author:
Chenglin Su; Lunbo Duan; Felix Donat; Edward John Anthony
Source:
Applied energy 2018 v.210 pp. 117-126
ISSN:
0306-2619
Subject:
X-ray diffraction; adsorption; bleaching; calcium; carbon dioxide; cement; clay; energy; fuels; heat; limestone; pelleting; pellets; pyrolysis; sorbents; wastes
Abstract:
... A novel calcium looping (CaL) process integrated with a spent bleaching clay (SBC) treatment is proposed whereby fuels and/or heat from regeneration of SBC provide extra energy for the calcination process, in addition, the regenerated SBC can be used to synthesize enhanced CaO-based sorbents. Different kinds of composite samples were prepared with the regenerated SBC and/or aluminate cement at var ...
DOI:
10.1016/j.apenergy.2017.10.104

3. Impact of fuel selection on the environmental performance of post-combustion calcium looping applied to a cement plant

Author:
Wouter Schakel; Christine Roxanne Hung; Lars-Andre Tokheim; Anders Hammer Strømman; Ernst Worrell; Andrea Ramírez
Source:
Applied energy 2018 v.210 pp. 75-87
ISSN:
0306-2619
Subject:
alternative fuels; biomass; calcium; carbon; carbon dioxide; cement; coal; electric energy consumption; energy balance; environmental impact; environmental performance; global warming; greenhouse gas emissions; life cycle assessment; limestone; meat and bone meal; models; natural gas; sorbents; Northern European region
Abstract:
... Calcium looping CO₂ capture is a promising technology to reduce CO₂ emissions from cement production. Coal has been seen as a logical choice of fuel to drive the calcium looping process as coal is already the primary fuel used to produce cement. This study assesses the impact of using different fuels, namely coal, natural gas, woody biomass and a fuel mix (50% coal, 25% biomass and 25% animal meal ...
DOI:
10.1016/j.apenergy.2017.10.123

4. Anaerobic digestion of waste activated sludge with incineration bottom ash: Enhanced methane production and CO2 sequestration

Author:
Changkai Yin; Yanwen Shen; Nanwen Zhu; Qiujie Huang; Ziyang Lou; Haiping Yuan
Source:
Applied energy 2018 v.215 pp. 503-511
ISSN:
0306-2619
Subject:
activated sludge; anaerobic digestion; biogas; bottom ash; byproducts; calcium; carbon dioxide; carbon sequestration; carbonation; cations; economic feasibility; hydrolysis; leaching; methane production; models; volatile fatty acids; China
Abstract:
... Development of anaerobic digestion (AD) technology in China for WWTP sludge treatment is hindered by low biomethane yield and costly biogas upgrading. This study investigated the feasibility of using a byproduct waste, sludge incineration bottom ash, as additive to promote AD performance. The effectiveness of ashes addition was investigated with varied dosages (0.6–1.5 g/g dry matter (DM) of sludg ...
DOI:
10.1016/j.apenergy.2018.02.056

5. Ca2Fe2O5: A promising oxygen carrier for CO/CH4 conversion and almost-pure H2 production with inherent CO2 capture over a two-step chemical looping hydrogen generation process

Author:
Zhao Sun; Shiyi Chen; Jun Hu; Aimin Chen; Asif Hasan Rony; Christopher K. Russell; Wenguo Xiang; Maohong Fan; M. Darby Dyar; Elizabeth C. Dklute
Source:
Applied energy 2018 v.211 pp. 431-442
ISSN:
0306-2619
Subject:
Mossbauer spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; adsorption; calcium; carbon; carbon dioxide; citric acid; energy-dispersive X-ray analysis; ferric oxide; ferrimagnetic materials; hydrogen; hydrogen production; iron; oxidants; oxidation; oxygen; scanning electron microscopy; sol-gel processing; steam; transmission electron microscopy
Abstract:
... Chemical looping hydrogen generation (CLHG) is a promising technology for high-purity hydrogen production with inherent CO₂ separation. The selection of a high-performance oxygen carrier capable of being reduced and oxidized over multiple redox cycles against deactivation is a key issue for CLHG technology. In this work, a two-step chemical looping hydrogen generation (TCLHG) process is proposed b ...
DOI:
10.1016/j.apenergy.2017.11.005

6. CaFe2O4 oxygen carrier characterization during the partial oxidation of coal in the chemical looping gasification application

Author:
Duane D. Miller; Ranjani Siriwardane
Source:
Applied energy 2018 v.224 pp. 708-716
ISSN:
0306-2619
Subject:
X-ray diffraction; calcium; calcium oxide; carbon; coal; density functional theory; ferrimagnetic materials; gasification; ions; iron; oxidation; oxygen; spectral analysis
Abstract:
... The calcium ferrite (CaFe₂O₄) oxygen carrier characterization during chemical looping coal gasification was conducted using X-ray diffraction and Raman spectroscopic analysis. Density functional theory (DFT) analysis and experimental data were used to elucidate the mechanism for the selective oxidation of coal char. The Raman spectroscopic analyses indicated that the initial reduction of CaFe₂O₄ w ...
DOI:
10.1016/j.apenergy.2018.05.035

7. Characterization of desert sand to be used as a high-temperature thermal energy storage medium in particle solar receiver technology

Author:
Miguel Diago; Alberto Crespo Iniesta; Audrey Soum-Glaude; Nicolas Calvet
Source:
Applied energy 2018 v.216 pp. 402-413
ISSN:
0306-2619
Subject:
absorption; calcium; calcium carbonate; calcium oxide; desert soils; heat; mechanical properties; optical properties; sand; solar collectors; temperature; thermal energy; thermal stability; thermogravimetry; United Arab Emirates
Abstract:
... Desert dune sand is considered as a potential sensible heat thermal energy storage (TES) material. Several samples are collected from different locations of the desert in the United Arab Emirates (UAE), and relevant thermophysical and mechanical properties are measured. In addition, the optical properties of desert sand are investigated to evaluate its performance as a direct solar absorber. Therm ...
DOI:
10.1016/j.apenergy.2018.02.106

8. Effect of biomass type, heating rate, and sample size on microwave-enhanced fast pyrolysis product yields and qualities

Author:
Jordan L. Klinger; Tyler L. Westover; Rachel M. Emerson; C. Luke Williams; Sergio Hernandez; Glen D. Monson; J. Chadron Ryan
Source:
Applied energy 2018 v.228 pp. 535-545
ISSN:
0306-2619
Subject:
Liriodendron tulipifera; agricultural wastes; bark; biomass; calcium; corn stover; energy crops; feedstocks; geometry; heat transfer; liquids; lumber; magnesium; microwave treatment; models; oils; particle size; potassium; pyrolysis; pyrolysis oils; reaction kinetics; sodium; standard deviation; temperature
Abstract:
... The products from fast pyrolysis of biomass are variable and highly dependent upon feedstock composition, particle size and geometry, and operating conditions such as heating rate, reaction temperature, and sweep gas composition and velocity. Microwave heating is internal to the biomass particles, thereby avoiding convective and conductive heat transfer limitations, which facilitates decoupling he ...
DOI:
10.1016/j.apenergy.2018.06.107

9. Improvement of H2-rich gas production with tar abatement from pine wood conversion over bi-functional Ca2Fe2O5 catalyst: Investigation of inner-looping redox reaction and promoting mechanisms

Author:
Zhao Sun; Shiyi Chen; Christopher K. Russell; Jun Hu; Asif H. Rony; Gang Tan; Aimin Chen; Lunbo Duan; John Boman; Jinke Tang; TeYu Chien; Maohong Fan; Wenguo Xiang
Source:
Applied energy 2018 v.212 pp. 931-943
ISSN:
0306-2619
Subject:
Pinus; X-ray diffraction; atmospheric pressure; biomass; calcium; carbon; catalysts; cost effectiveness; durability; energy-dispersive X-ray analysis; gasification; hydrogen; pyrolysis; redox reactions; scanning electron microscopy; screening; steam; synthesis gas; temperature; transmission electron microscopy; wood
Abstract:
... The objective of this research was to find cost-effective inner-looping redox-reaction-based biomass conversion catalysts by screening five Fe-containing materials through the integration of pine wood pyrolysis and gasification. All the evaluation tests are conducted in a fixed bed reactor under atmospheric pressure. The effect of temperature, water injection rate (steam/biomass ratio), catalyst l ...
DOI:
10.1016/j.apenergy.2017.12.087

10. Pilot testing of enhanced sorbents for calcium looping with cement production

Author:
María Erans; Michal Jeremias; Liya Zheng; Joseph G. Yao; John Blamey; Vasilije Manovic; Paul S. Fennell; Edward J. Anthony
Source:
Applied energy 2018 v.225 pp. 392-401
ISSN:
0306-2619
Subject:
calcium; carbon; carbon dioxide; carrying capacity; cement; chemical composition; compression strength; feedstocks; fluidized beds; hydrobromic acid; limestone; manufacturing; pellets; production costs; sorbents; strength (mechanics)
Abstract:
... One of the main challenges for commercialising calcium looping (CaL) as a CO₂ capture technology is maintaining a high level of sorbent reactivity during long-term cycling. In order to mitigate the decay in carrying capacity, research has moved towards producing enhanced sorbents. However, this creates potential problems related to ease of scaling up production techniques and production costs, and ...
DOI:
10.1016/j.apenergy.2018.05.039

11. Redox cycles with doped calcium manganites for thermochemical energy storage to 1000 °C

Author:
Luca Imponenti; Kevin J. Albrecht; Rounak Kharait; Michael D. Sanders; Gregory S. Jackson
Source:
Applied energy 2018 v.230 pp. 1-18
ISSN:
0306-2619
Subject:
air; calcium; cost effectiveness; differential scanning calorimetry; energy; enthalpy; heat recovery; models; oxygen; solar collectors; solar energy; specific energy; temperature; thermogravimetry
Abstract:
... Redox cycles of doped calcium manganite perovskites (CaMnO₃₋δ) are studied for cost-effective thermochemical energy storage at temperatures up to 1000 °C for concentrating solar power and other applications. If the thermodynamics and kinetics for heat-driven reduction can be tailored for high temperatures and industrially accessible low O₂ partial pressures (PO2⩾10-4 bar), perovskite redox cycles ...
DOI:
10.1016/j.apenergy.2018.08.044

12. Synthesis gas production from microalgae gasification in the presence of Fe2O3 oxygen carrier and CaO additive

Author:
Guicai Liu; Yanfen Liao; Yuting Wu; Xiaoqian Ma
Source:
Applied energy 2018 v.212 pp. 955-965
ISSN:
0306-2619
Subject:
X-ray diffraction; absorbents; calcium; calcium oxide; carbon; carbon dioxide; carbon monoxide; catalysts; energy-dispersive X-ray analysis; ferric oxide; gasification; hydrogen; hydrogen production; microalgae; oxygen; scanning electron microscopy; synthesis gas; thermal properties
Abstract:
... Microalgae gasification in the presence of Fe₂O₃ oxygen carrier and CaO additive was investigated in a fixed bed reactor to simulate the reactions in direct chemical looping gasification, focusing on the thermal behavior of CaO in synthesis gas production and multiple redox cycles. The results showed that Fe₂O₃ as oxygen carrier improved the synthesis gas but brought much more CO₂ generation, lowe ...
DOI:
10.1016/j.apenergy.2017.12.110