The Experts below are selected from a list of 315 Experts worldwide ranked by ideXlab platform
Ivan Ermanoski - One of the best experts on this subject based on the ideXlab platform.
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Thermally-driven adsorption/desorption cycle for oxygen pumping in thermochemical Fuel Production
Solar Energy, 2020Co-Authors: Ivan Ermanoski, Ellen B. StechelAbstract:Abstract The two-step cycle for solar-thermochemical Fuels Production and thermochemical energy storage benefits from low oxygen partial pressure in the high-temperature thermal reduction step. To be practical, low oxygen partial pressures must be reached by energetically efficient and economically affordable methods—a challenge currently not met by either mechanical vacuum pumping or by inert gas sweeping. To address this challenge, we have examined a promising, thermally-driven surface adsorption/desorption approach. Providing that appropriately designed materials can be identified as expected, this approach would substantially advance solar-thermochemical Fuel Production (water and carbon dioxide splitting), thermochemical energy storage, and related technologies.
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Maximizing Efficiency in Two-step Solar-thermochemical Fuel Production
Energy Procedia, 2015Co-Authors: Ivan ErmanoskiAbstract:Widespread solar Fuel Production depends on its economic viability, largely driven by the solar-to-Fuel conversion efficiency. Herein, the material and energy requirements in two-step solar-thermochemical cyclesare considered.The need for advanced redox active materials is demonstrated, by considering the oxide mass flow requirements at a large scale. Two approaches are also identified for maximizing the efficiency: optimizing reaction temperatures, and minimizing the pressure in the thermal reduction step by staged thermal reduction. The results show that each approach individually, and especially the two in conjunction, result in significant efficiency gains.
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Cascading pressure thermal reduction for efficient solar Fuel Production
International Journal of Hydrogen Energy, 2014Co-Authors: Ivan ErmanoskiAbstract:Abstract Efficient two-step solar-thermochemical Fuel Production requires vacuum pumping or inert gas sweeping to lower the oxygen pressure in the thermal reduction step. Pumping is hampered by large oxygen volumetric flows, whereas sweeping is energy-intensive, requiring heat recovery at high temperature, and a dedicated inert gas purification plant. A novel pumping approach—using a cascade of chambers at successively lower pressures—is analyzed and shown to lead to over an order of magnitude pressure decrease compared to a single-chambered design. The resulting efficiency gains are substantial, and represent an important step toward practical and efficient solar Fuel Production on a large scale.
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efficiency maximization in solar thermochemical Fuel Production challenging the concept of isothermal water splitting
Physical Chemistry Chemical Physics, 2014Co-Authors: Ivan Ermanoski, James E. Miller, Mark D. AllendorfAbstract:Widespread adoption of solar-thermochemical Fuel Production depends on its economic viability, largely driven by the efficiency of use of the available solar resource. Herein, we analyze the efficiency of two-step cycles for thermochemical hydrogen Production, with emphasis on efficiency. Owing to water thermodynamics, isothermal H2 Production is shown to be impractical and inefficient, irrespective of reactor design or reactive oxide properties, but an optimal temperature difference between cycle steps, for which efficiency is the highest, can be determined for a wide range of other operating parameters. A combination of well-targeted pressure and temperature swing, rather than either individually, emerges as the most efficient mode of operation of a two-step thermochemical cycle for solar Fuel Production.
James G. Speight - One of the best experts on this subject based on the ideXlab platform.
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Gasification for Synthetic Fuel Production
Gasification for Synthetic Fuel Production, 2015Co-Authors: Rafael Luque, James G. SpeightAbstract:This chapter discusses general considerations on gasification processes and synthetic liquid Fuel Production. It provides an overview of state-of-the-art gasification technologies, feedstocks and applications in power generation, and synthetic Fuels Production, together with some recent future trends in the field.
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1 - Gasification and synthetic liquid Fuel Production: an overview BT - Gasification for Synthetic Fuel Production
Woodhead Publishing Series in Energy, 2015Co-Authors: Rafael Luque, James G. SpeightAbstract:Abstract This chapter discusses general considerations on gasification processes and synthetic liquid Fuel Production. It provides an overview of state-of-the-art gasification technologies, feedstocks and applications in power generation, and synthetic Fuels Production, together with some recent future trends in the field.
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Gasification and synthetic liquid Fuel Production: an overview
Gasification for Synthetic Fuel Production, 2014Co-Authors: Rafael Luque, James G. SpeightAbstract:This chapter discusses general considerations on gasification processes and synthetic liquid Fuel Production. It provides an overview of state-of-the-art gasification technologies, feedstocks and applications in power generation, and synthetic Fuels Production, together with some recent future trends in the field.
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Synthetic liquid Fuel Production from gasification
Gasification for Synthetic Fuel Production, 2014Co-Authors: James G. SpeightAbstract:Abstract Gasification can be used to convert a variety of feedstock substrates (tar sand bitumen, coal, oil shale, and biomass are used as the examples) to distillate products. This chapter provides a general description of the Fischer-Tropsch technology and the Production and upgrading of synthetic crude oil. In addition, recent developments in thermal technology for synthetic Fuel Production are also presented. Also, for comparison, the chapter provides presentation of the means by which non–Fischer-Tropsch synthetic crude oil is converted to specification-grade Fuels.
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Gasification for Synthetic Fuel Production: Fundamentals, Processes and Applications
Gasification for Synthetic Fuel Production: Fundamentals Processes and Applications, 2014Co-Authors: Rafael Luque, James G. SpeightAbstract:Gasification involves the conversion of carbon sources without combustion to syngas, which can be used as a Fuel itself or further processed to synthetic Fuels. The technology provides a potentially more efficient means of energy generation than direct combustion. This book provides an overview of gasification science and engineering and the Production of synthetic Fuels by gasification from a variety of feedstocks. Part one introduces gasification, reviewing the scientific basis of the process and gasification engineering. Part two then addresses gasification and synthentic Fuel Production processes. Finally, chapters in part three outline the different applications of gasification, with chapters on the conversion of different types of feedstock. • Examines the design of gasifiers, the preparation of feedstocks, and the economic, environmental and policy issues related to gasification • Reviews gasification processes for liquid Fuel Production • Outlines the different applications of gasification technology.
Mark D. Allendorf - One of the best experts on this subject based on the ideXlab platform.
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Design of Materials for Solar-Driven Fuel Production by Metal-Oxide Thermochemical Cycles
The Electrochemical Society interface, 2019Co-Authors: Mark D. Allendorf, James E. Miller, Anthony H. McdanielAbstract:Development of carbon-neutral routes to liquid Fuels is essential if the impacts of climate change are to be mitigated and ultimately reversed. Accounting for thermochemical collection and processing efficiencies, solar thermochemical Fuel Production (STFP) could achieve average annual solar-to-Fuel efficiencies (AASFE) in excess of 25% using a dish solar collector, assuming the development of an advanced working metal oxide substrate. A large number of diverse metal oxides have been proposed for STFP, the most actively investigated materials currently are the non-volatile oxides ferrites and ceria. This article provides insights into the design of materials for solar-driven Fuel Production using thermochemical cycles.
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efficiency maximization in solar thermochemical Fuel Production challenging the concept of isothermal water splitting
Physical Chemistry Chemical Physics, 2014Co-Authors: Ivan Ermanoski, James E. Miller, Mark D. AllendorfAbstract:Widespread adoption of solar-thermochemical Fuel Production depends on its economic viability, largely driven by the efficiency of use of the available solar resource. Herein, we analyze the efficiency of two-step cycles for thermochemical hydrogen Production, with emphasis on efficiency. Owing to water thermodynamics, isothermal H2 Production is shown to be impractical and inefficient, irrespective of reactor design or reactive oxide properties, but an optimal temperature difference between cycle steps, for which efficiency is the highest, can be determined for a wide range of other operating parameters. A combination of well-targeted pressure and temperature swing, rather than either individually, emerges as the most efficient mode of operation of a two-step thermochemical cycle for solar Fuel Production.
Guanyi Chen - One of the best experts on this subject based on the ideXlab platform.
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Technical review on jet Fuel Production
Renewable & Sustainable Energy Reviews, 2013Co-Authors: Guanyi ChenAbstract:In present study, we investigated jet Fuel Production process, including the crude oil-based conventional process, unconventional oil sources-based process, Fischer–Tropsch synthesis (F–T) process and renewable jet Fuel process and analyzed the details of each jet Fuel Production process. Among these jet Fuel Production technologies, the F–T synthesis and renewable jet Fuel process supply alternative Fuels with potential environmental benefit of reduced life cycle greenhouse gas (GHG) emissions and the economic benefits associated with increased Fuel availability and lower Fuel costs. The F–T synthesis has a major advantage with the possibility of accepting any carbon-based input, which makes it suitable for using a variety of sources such as coal, natural gas and 2nd generation biomass as feedstocks. The renewable jet Fuel process such as Bio-Synfining™ (Syntroleum) and Ecofining™ (UOP) as well as C-L™ (Tianjin University) is a low capital cost process of producing high quality synthetic paraffinic kerosene (SPK) from bio-renewable feeds like vegetable oils/fats and waste cooking oils/fats, greases, energy plants of jatropha and algal. The SPK has superior Fuel properties to other options available today, with higher cetane number, lower cloud point and lower emissions
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Technical review on jet Fuel Production
Renewable and Sustainable Energy Reviews, 2013Co-Authors: Guangrui Liu, Beibei Yan, Guanyi ChenAbstract:In present study, we investigated jet Fuel Production process, including the crude oil-based conventional process, unconventional oil sources-based process, Fischer-Tropsch synthesis (F-T) process and renewable jet Fuel process and analyzed the details of each jet Fuel Production process. Among these jet Fuel Production technologies, the F-T synthesis and renewable jet Fuel process supply alternative Fuels with potential environmental benefit of reduced life cycle greenhouse gas (GHG) emissions and the economic benefits associated with increased Fuel availability and lower Fuel costs. The F-T synthesis has a major advantage with the possibility of accepting any carbon-based input, which makes it suitable for using a variety of sources such as coal, natural gas and 2nd generation biomass as feedstocks. The renewable jet Fuel process such as Bio-Synfining™ (Syntroleum) and Ecofining™ (UOP) as well as C-L™ (Tianjin University) is a low capital cost process of producing high quality synthetic paraffinic kerosene (SPK) from bio-renewable feeds like vegetable oils/fats and waste cooking oils/fats, greases, energy plants of jatropha and algal. The SPK has superior Fuel properties to other options available today, with higher cetane number, lower cloud point and lower emissions. © 2013 Published by Elsevier Ltd.
Ghim Wei Ho - One of the best experts on this subject based on the ideXlab platform.
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visible to nir photon harvesting progressive engineering of catalysts for solar powered environmental purification and Fuel Production
Advanced Materials, 2018Co-Authors: Minquan Yang, Minghui Hong, Ghim Wei HoAbstract:: Utilization of diffusive solar energy through photocatalytic processes for environmental purification and Fuel Production has long been pursued. However, efficient capture of visible-near-infrared (NIR) photons, especially for those with wavelengths longer than 600 nm, is a demanding quest in photocatalysis owing to their relatively low energy. In recent years, benefiting from the advances in photoactive material design, photocatalytic reaction system optimization, and new emerging mechanisms for long-wavelength photon activation, increasing numbers of studies on the harnessing of visible-NIR light for solar-to-chemical energy conversion have been reported. Here, the aim is to comprehensively summarize the progress in this area. The main strategies of the long-wavelength visible-NIR photon capture and the explicitly engineered material systems, i.e., narrow optical gap, photosensitizers, upconversion, and photothermal materials, are elaborated. In addition, the advances in long-wavelength light-driven photo- and photothermal-catalytic environmental remediation and Fuel Production are discussed. It is anticipated that this review presents the forefront achievements in visible-NIR photon capture and at the same time promotes the development of novel visible-NIR photon harnessing catalysts toward efficient solar energy utilization.
