The Experts below are selected from a list of 309 Experts worldwide ranked by ideXlab platform
D. Stolten - One of the best experts on this subject based on the ideXlab platform.
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Operating strategies for Fuel Processing systems with a focus on water–gas shift reactor stability
Applied Energy, 2016Co-Authors: Daniel Krekel, Remzi Can Samsun, Joachim Pasel, Matthias Prawitz, Ralf Peters, D. StoltenAbstract:Abstract This contribution deals with the development of suitable operating strategies for diesel/kerosene-Fueled Fuel cell APUs. The focus is on the autothermal reformer (ATR) and the water–gas shift (WGS) reactor. In the first part shutdown experiments under high-temperature shift (HTS) conditions were used to identify the possible detrimental effect of higher hydrocarbons on the activity and stability of two commercial WGS catalysts. The results indicated that 220 ppmv higher hydrocarbons had no negative effect on the catalyst activity/stability. The second part presents Fuel Processing system experiments, which revealed much higher concentrations of higher hydrocarbons during transients like startup/shutdown than the concentrations investigated in the first part. Through the development of new startup/shutdown strategies concentrations of higher hydrocarbons were lowered by a factor of up to 10 for startup and of up to 400 for shutdown. The results were reproduced using four different diesel and kerosene Fuels. The newly developed strategies improve Fuel conversion in the reformer and may possibly prevent catalyst deactivation in the water–gas shift reactor during transient conditions.
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Fuel Processing of Diesel and Kerosene for Auxiliary Power Unit Applications
Energy & Fuels, 2013Co-Authors: Joachim Pasel, Remzi Can Samsun, Ralf Peters, D. StoltenAbstract:Apart from necessary balance-of-plant components, such as pumps, blowers, sensors, and heat exchangers, the Fuel Processing unit of a high-temperature polymer electrolyte Fuel cell (HT-PEFC) system...
Joachim Pasel - One of the best experts on this subject based on the ideXlab platform.
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Operating strategies for Fuel Processing systems with a focus on water–gas shift reactor stability
Applied Energy, 2016Co-Authors: Daniel Krekel, Remzi Can Samsun, Joachim Pasel, Matthias Prawitz, Ralf Peters, D. StoltenAbstract:Abstract This contribution deals with the development of suitable operating strategies for diesel/kerosene-Fueled Fuel cell APUs. The focus is on the autothermal reformer (ATR) and the water–gas shift (WGS) reactor. In the first part shutdown experiments under high-temperature shift (HTS) conditions were used to identify the possible detrimental effect of higher hydrocarbons on the activity and stability of two commercial WGS catalysts. The results indicated that 220 ppmv higher hydrocarbons had no negative effect on the catalyst activity/stability. The second part presents Fuel Processing system experiments, which revealed much higher concentrations of higher hydrocarbons during transients like startup/shutdown than the concentrations investigated in the first part. Through the development of new startup/shutdown strategies concentrations of higher hydrocarbons were lowered by a factor of up to 10 for startup and of up to 400 for shutdown. The results were reproduced using four different diesel and kerosene Fuels. The newly developed strategies improve Fuel conversion in the reformer and may possibly prevent catalyst deactivation in the water–gas shift reactor during transient conditions.
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Fuel Processing of Diesel and Kerosene for Auxiliary Power Unit Applications
Energy & Fuels, 2013Co-Authors: Joachim Pasel, Remzi Can Samsun, Ralf Peters, D. StoltenAbstract:Apart from necessary balance-of-plant components, such as pumps, blowers, sensors, and heat exchangers, the Fuel Processing unit of a high-temperature polymer electrolyte Fuel cell (HT-PEFC) system...
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Fuel Processing of diesel and kerosene for auxiliary power unit applications
Energy & Fuels, 2013Co-Authors: Joachim Pasel, Ralf Peters, Remzi Ca Samsu, Detlef StolteAbstract:Apart from necessary balance-of-plant components, such as pumps, blowers, sensors, and heat exchangers, the Fuel Processing unit of a high-temperature polymer electrolyte Fuel cell (HT-PEFC) system based on autothermal reforming contains three main components: the autothermal reformer, the water-gas shift reactor, and the catalytic burner. In Julich, several generations of these catalytic reactors have been designed, constructed, and manufactured, with a wide range of thermal powers between 13 and 140 kW. Characteristic common features of the respective reactor generations are described as well as their specific structural features. The experimental part of this paper concentrates on investigations with different generations of reactors for autothermal reforming using different diesel and kerosene Fuels, which were produced either via the gas-to-liquid or bio-to-liquid process or in a conventional manner from crude oil. They mainly differed from each other with respect to their boiling ranges and mass fra...
Ralf Peters - One of the best experts on this subject based on the ideXlab platform.
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Operating strategies for Fuel Processing systems with a focus on water–gas shift reactor stability
Applied Energy, 2016Co-Authors: Daniel Krekel, Remzi Can Samsun, Joachim Pasel, Matthias Prawitz, Ralf Peters, D. StoltenAbstract:Abstract This contribution deals with the development of suitable operating strategies for diesel/kerosene-Fueled Fuel cell APUs. The focus is on the autothermal reformer (ATR) and the water–gas shift (WGS) reactor. In the first part shutdown experiments under high-temperature shift (HTS) conditions were used to identify the possible detrimental effect of higher hydrocarbons on the activity and stability of two commercial WGS catalysts. The results indicated that 220 ppmv higher hydrocarbons had no negative effect on the catalyst activity/stability. The second part presents Fuel Processing system experiments, which revealed much higher concentrations of higher hydrocarbons during transients like startup/shutdown than the concentrations investigated in the first part. Through the development of new startup/shutdown strategies concentrations of higher hydrocarbons were lowered by a factor of up to 10 for startup and of up to 400 for shutdown. The results were reproduced using four different diesel and kerosene Fuels. The newly developed strategies improve Fuel conversion in the reformer and may possibly prevent catalyst deactivation in the water–gas shift reactor during transient conditions.
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Fuel Processing of Diesel and Kerosene for Auxiliary Power Unit Applications
Energy & Fuels, 2013Co-Authors: Joachim Pasel, Remzi Can Samsun, Ralf Peters, D. StoltenAbstract:Apart from necessary balance-of-plant components, such as pumps, blowers, sensors, and heat exchangers, the Fuel Processing unit of a high-temperature polymer electrolyte Fuel cell (HT-PEFC) system...
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Fuel Processing of diesel and kerosene for auxiliary power unit applications
Energy & Fuels, 2013Co-Authors: Joachim Pasel, Ralf Peters, Remzi Ca Samsu, Detlef StolteAbstract:Apart from necessary balance-of-plant components, such as pumps, blowers, sensors, and heat exchangers, the Fuel Processing unit of a high-temperature polymer electrolyte Fuel cell (HT-PEFC) system based on autothermal reforming contains three main components: the autothermal reformer, the water-gas shift reactor, and the catalytic burner. In Julich, several generations of these catalytic reactors have been designed, constructed, and manufactured, with a wide range of thermal powers between 13 and 140 kW. Characteristic common features of the respective reactor generations are described as well as their specific structural features. The experimental part of this paper concentrates on investigations with different generations of reactors for autothermal reforming using different diesel and kerosene Fuels, which were produced either via the gas-to-liquid or bio-to-liquid process or in a conventional manner from crude oil. They mainly differed from each other with respect to their boiling ranges and mass fra...
Joongmyeon Bae - One of the best experts on this subject based on the ideXlab platform.
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Fuel Processor Lifetime and Reliability in Solid Oxide Fuel Cells
Solid Oxide Fuel Cell Lifetime and Reliability: Critical Challenges in Fuel Cells, 2017Co-Authors: Joongmyeon BaeAbstract:Fuel flexibility is one of the advantages of solid oxide Fuel cells (SOFCs). Fuel Processing technology facilitates the Fuel flexibility to be extended to complex hydrocarbon Fuels such as diesel and gasoline. To maximize the Fuel flexibility, Fuel Processing technology includes liquid Fuel reforming. The Fuel Processing process affects the durability in SOFCs. In particular, the desulfurization process and postreforming process that eliminate light hydrocarbons have great roles to increase the lifetime of SOFCs. In this chapter, Fuel Processing and its design factors that affect the SOFC lifetime and reliability are described. Moreover, postProcessing technologies that extend the SOFC lifetime in Fuel Processing steps are summarized.
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Liquid Fuel Processing for hydrogen production: A review
International Journal of Hydrogen Energy, 2016Co-Authors: Joongmyeon Bae, Sangho Lee, Sunyoung Kim, Seunghyeon Choi, Minseok Bae, Inyong Kang, Sai P. KatikaneniAbstract:Abstract Liquid Fuel Processing technologies have attracted attention because of the increasing importance of energy and environmental problems. Liquid Fuels such as gasoline and diesel are promising hydrogen sources because of their high hydrogen densities, widespread applications and well-constructed infrastructure. Liquid Fuels can be used in various applications, such as Fuel cells, through liquid Fuel Processing. Pure hydrogen or natural gas has been used depending on the Fuel cell type. However, pure hydrogen and natural gas are unavailable in some applications and areas. Therefore, Fuel cell applications can be diversified by using liquid Fuels. The liquid Fuel delivery, catalytic reforming and reformate cleaning processes have been investigated for producing hydrogen-rich gases. Some kW-class reactors have also been developed for practical applications. This paper will summarize and discuss each liquid Fuel Processing technology and the kW-class reactors for converting liquid Fuels into hydrogen-rich gases in a stable manner.
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Development of a self-sustaining kWe-class integrated diesel Fuel Processing system for solid oxide Fuel cells
International Journal of Hydrogen Energy, 2011Co-Authors: Sangho Yoon, Sangho Lee, Joongmyeon BaeAbstract:Abstract Among high temperature Fuel cells, solid oxide Fuel cells (SOFCs) possess several advantages such as Fuel flexibility, high power density, and high-quality waste heat for cogeneration applications. However, if the reformates of hydrocarbon Fuel are used to operate SOFCs, sulfur poisoning and carbon deposition is observed. Diesel reformate contains sulfur compounds and residual low-molecular-weight (LMW) hydrocarbons, which are formed on the anode of the SOFC. In this study, a new type of diesel Fuel Processing system was introduced for the stable operation of SOFCs. The novel diesel Fuel processor contains three different reaction stages: autothermal reforming (ATR), adsorptive desulfurization, and post-reforming. For the stable operationfof SOFCs, the desulfurization and post-reforming processes are used to eliminate sulfur compounds and residual light hydrocarbons from the diesel reformate. The proposed Fuel processor does not require an additional heat exchanger or electrical equipment for the supply of heat or the vaporization of Fuel and water. The integrated reactor can be implemented as a self-sustaining reactor due to the exothermic nature of the ATR reaction. The reaction temperature of desulfurization and post-reforming processes are controlled by the arrangement of the reactors and heat exchange through the integrated reactor. The kWe self-sustaining integrated diesel Fuel processor was operated for approximately 1000 h, and a reforming efficiency of 60% was achieved. Moreover, the desulfurizer and post-reforming reactor completely removed H2S and light hydrocarbons from the diesel reformate.
W. S. Winston Ho - One of the best experts on this subject based on the ideXlab platform.
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Recent developments in Fuel‐Processing and proton‐exchange membranes for Fuel cells
Polymer International, 2010Co-Authors: He Bai, W. S. Winston HoAbstract:In recent years, great progress has been made in the development of proton-exchange membrane Fuel cells (PEMFCs) for both mobile and stationary applications. This review covers two types of new membranes: (1) carbon dioxide-selective membranes for hydrogen purification and (2) proton-exchange membranes; both of these are crucial to the widespread application of PEMFCs. On hydrogen purification for Fuel cells, the new facilitated transport membranes synthesized from incorporating amino groups in polymer networks have shown high CO2 permeability and selectivity versus H2. The membranes can be used in Fuel Processing to produce high-purity hydrogen (with less than 10 ppm CO and 10 ppb H2S) for Fuel cells. On proton-exchange membranes, the new sulfonated polybenzimidazole copolymer-based membranes can outperform Nafion® under various conditions, particularly at high temperatures and low relative humidities. Copyright © 2010 Society of Chemical Industry
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Recent developments in Fuel-Processing and proton-exchange membranes for Fuel cells
Polymer International, 2010Co-Authors: W. S. Winston HoAbstract:In recent years, great progress has been made in the development of proton-exchange membrane Fuel cells (PEMFCs) for both mobile and stationary applications. This review covers two types of new membranes: (1) carbon dioxide-selective membranes for hydrogen purification and (2) proton-exchange membranes; both of these are crucial to the widespread application of PEMFCs. On hydrogen purification for Fuel cells, the new facilitated transport membranes synthesized from incorporating amino groups in polymer networks have shown high CO2 permeability and selectivity versus H2. The membranes can be used in Fuel Processing to produce high-purity hydrogen (with less than 10 ppm CO and 10 ppb H2S) for Fuel cells. On proton-exchange membranes, the new sulfonated polybenzimidazole copolymer-based membranes can outperform Nafion® under various conditions, particularly at high temperatures and low relative humidities. Copyright © 2010 Society of Chemical Industry
