Simulation of exhaust gas reforming of natural gas in a microchannel reactor

Bulutoglu, Pelin Su; Koc, Sinan; Avcı, Ahmet K.

doi:10.1016/j.ijhydene.2015.10.126

Cited by 15 publications

(2 citation statements)

References 33 publications

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“…As the rate of the steam reforming reaction increases, more heat is consumed by steam reforming reaction, and this results in a lower temperature distribution along the reactor. Similar results were reported by Bulutoglu et al .…”

Section: Resultsmentioning

confidence: 99%

Kinetic and CFD Modeling of Exhaust Gas Reforming of Natural Gas in a Catalytic Fixed‐Bed Reactor for Spark Ignition Engines

et al. 2020

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Fuel reforming is an attractive method for performance enhancement of internal combustion engines fueled by natural gas, since the syngas can be generated inline from the reforming process. In this study, 1D and 2D steady‐state modeling of exhaust gas reforming of natural gas in a catalytic fixed‐bed reactor were conducted under different conditions. With increasing engine speed, methane conversion and hydrogen production increased. Similarly, increasing the fraction of recirculated exhaust gas resulted in higher consumption of methane and generation of H2 and CO. Steam addition enhanced methane conversion. However, when the amount of steam exceeded that of methane, less hydrogen was produced. Increasing the wall temperature increased the methane conversion and reduced the H2/CO ratio.

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Section: Resultsmentioning

confidence: 99%

Kinetic and CFD Modeling of Exhaust Gas Reforming of Natural Gas in a Catalytic Fixed‐Bed Reactor for Spark Ignition Engines

et al. 2020

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“…19,20 Recent research on the application of exhaust gas fuel reforming has been mostly related to diesel engine combustion and aftertreatment enhancement. 21,22 Some studies have investigated exhaust gas reforming of various bio-fuels, with the application of bio-diesel reforming to CI engines 21,22 as well as natural gas, 23,24 methanol 25 and ethanol 19,[25][26][27] reforming to SI engines. There has been less work dedicated to the use of exhaust gas fuel reforming with the gasoline engine using real exhaust gas produced under realistic engine operating conditions, although early work did envisage this application and it has been developed to some degree over the years.…”

Section: Introductionmentioning

confidence: 99%

On-board thermochemical energy recovery technology for low carbon clean gasoline direct injection engine powered vehicles

Fennell

Herreros

Tsolakis

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part D:

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Exhaust gas fuel reforming is a catalytic process that reclaims exhaust energy from the high temperature engine exhaust stream to drive catalytic endothermic fuel reforming reactions; these convert hydrocarbon fuel to higher enthalpy hydrogen-rich gas known as reformate. This technique has the potential to improve the thermal efficiency of internal combustion engines, as well as to simultaneously reduce gaseous and particulate emissions. This study demonstrates a novel, prototype exhaust gas fuel reformer integrated with a modern, turbocharged, 4-cylinder gasoline direct injection engine and analyses the effects on engine performance, combustion characteristics and emissions. The results suggest that exhaust gas fuel reforming raises the engine fuel efficiency through a combination of: exhaust energy recovery; improved engine thermal efficiency; and enhanced combustion at highly dilute operation, which considerably reduces NO x emissions by up to 91% and improves engine fuel consumption by up to 8%. The presence of hydrogen and exhaust gas diluents in the combustion charge also reduces particle formation for lower total particulate matter emissions (up to 78% and 84% for number and mass, respectively).

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Diagnostics and Prognostics‐Oriented Modeling of an NGSR Fuel Processor for Application in SOFC Systems

et al. 2017

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Diagnostics and prognostics of natural gas steam reforming (NGSR) reactors are of utmost importance for solid oxide fuel cell (SOFC) systems, where a fuel processor fault can cause damage to the SOFC stack. Most common faults are due to carbon deposition. We investigate this phenomenon through a model based on microscopic mass, energy and momentum balances of a tubular NGSR reactor. The model includes a detailed local reaction kinetics specific for Ni-based catalysts, and is integrated numerically using a finite element method (FEM) implemented through COMSOL Multiphysics 5.2. Results obtained from the simulation of a laboratory scale reactor are validated on the basis of literature data. Furthermore, the model is applied to an NGSR fuel processor designed for an 1.1 kW SOFC system. The model allows to identify the area where carbon deposition is expected to occur, which is a key feature in view of developing specific diagnostic and prognostic tools. The simulation results demonstrate that safety criteria based on the feedstock steam to carbon (S/C) ratio can be misleading in a number of operating conditions.

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Simulation of exhaust gas reforming of natural gas in a microchannel reactor

Cited by 15 publications

References 33 publications

Kinetic and CFD Modeling of Exhaust Gas Reforming of Natural Gas in a Catalytic Fixed‐Bed Reactor for Spark Ignition Engines

Kinetic and CFD Modeling of Exhaust Gas Reforming of Natural Gas in a Catalytic Fixed‐Bed Reactor for Spark Ignition Engines

On-board thermochemical energy recovery technology for low carbon clean gasoline direct injection engine powered vehicles

Diagnostics and Prognostics‐Oriented Modeling of an NGSR Fuel Processor for Application in SOFC Systems

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