Simulation and experimental analysis on the development of a co-axial cylindrical methane steam reformer using an electrically heated alumite catalyst

Zhang, Qi; Nakaya, Makoto; Ootani, Tetsuya; Takahashi, Hiroshi; Sakurai, Makoto; Kameyama, Hideo

doi:10.1016/j.ijhydene.2007.05.031

Cited by 30 publications

(6 citation statements)

References 16 publications

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“…One of the highlights of this study is to start up the reformer by EHAC. In our previous study, we have compared the difference of electrically internal heating and external heating methods and electrically heating start‐up phenomena 17, 24. On the other hand, as the heat generated by the methane combustion reaction is supplied to the endothermic side to sustain the reforming reactions, the amount of the fuel is also an essential factor for the heat exchange system.…”

Section: Resultsmentioning

confidence: 99%

Numerical investigations on the development of plate reformers: Comparison of different assignments of the chambers

2008

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in Wiley InterScience (www.interscience.wiley.com).Two compact plate methane steam reformers, consisting of closely spaced plate electrically heated alumite catalysts, have been numerically investigated in the relation to heat and mass transfer. Based on the ordinary heat exchange reformer (HER), where endothermic and exothermic reactions take place in alternative chambers, a developed heat exchange reformer coupled with preheating chamber (PHER) is proposed by integrating a preheating chamber with a combustion chamber. The simulation results predicted that the PHER could be started by electrical heating through a catalyst at the beginning, even with the inlet combustion gas temperature of 298 K, whereas the HER requires a combustion inlet temperature as high as 723 K, which showed the PEHR high potential for simplifying the heat exchange network in a fuel processor. On the other hand, the compact structure of the reformer could constitute a single unite of reformer, which is easy to be placed and scaled up.

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Section: Resultsmentioning

confidence: 99%

Numerical investigations on the development of plate reformers: Comparison of different assignments of the chambers

2008

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“…Zhang et al 143 and Zhou et al 139 reported the use of platetype alumina supports impregnated with Ni for electrified methane steam reforming. The commercial plate-type AlCrNi alloy/Al clad base material consists of an Al layer thickness of 45 μm and a FeCrNi alloy layer thickness of 85 μm.…”

Section: Joule-heated Methane Reformingmentioning

confidence: 99%

Joule-Heated Catalytic Reactors toward Decarbonization and Process Intensification: A Review

Zheng,

Ambrosetti,

Tronconi

2023

ACS Eng. Au

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The supply of the heat required for chemical processes via renewable electricity, i.e., process electrification, provides an alternative strategy for replacing conventional fossil fuel combustion. This approach enables fast, selective, and uniform heating, offers great potential for utilizing the excess renewable electric energy, and brings about an important chance for mitigating CO 2 emissions. In this work, we provide an overview of the state-of-the-art electricity-to-heat driven catalytic processes. The principle and fundamentals of Joule heating are provided and briefly compared to induction and microwave heating in view of electrifying catalytic processes. By this comparison, we assess that Joule heating can be regarded as the most promising method for process electrification, and its applications to methane reforming, cracking reactions, CO 2 valorization, and transient process operation are then reviewed. Advantages and disadvantages are critically addressed in terms of efficiency, potential for scale-up and possibility of retrofitting. The current challenges in the development of advanced electrified processes as well as the opportunities of next generation electrification techniques are discussed.

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“…In a plate-type configuration, gases are generally flown parallel to the surface of the plate in the presence of a voltage difference applied across the length of a plate (Figure b). Zhang et al reported the methane reforming performance of a Ni/Al 2 O 3 catalyst coated onto an Al 2 O 3 /CrAlloy/Al 2 O 3 clad plate synthesized by anodization of a commercial Al/CrAlloy/Al clad plate . The plate consisted of an 80 μm thick core with a 40 μm alumina layer on either side and was flexible enough to be tested in a spiraled configuration.…”

Section: Catalyst Configurationsmentioning

confidence: 99%

Electrified Catalysts for Endothermic Chemical Processes: Materials Needs, Advances, and Challenges

Idamakanti,

Ledesma,

Ratnakar

et al. 2023

ACS Eng. Au

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Large-scale endothermic chemical processes, as currently practiced, employ tubular reactors that are heated externally through the combustion of fossil fuels, and are highly carbon-intensive. Joule-heated reactors in which electric currents flowing through the catalyst are used to provide thermal energy directly through internal heating are rapidly emerging as an alternative to these conventional, externally heated reactors. Jouleheated reactors could help significantly improve modularity and also reduce the capital, energy, and carbon footprint associated with these enthalpically demanding processes. Development of these novel types of reactors, however, is predicated on overcoming catalyst design challenges encountered uniquely when supplying heat through the use of electric currents passing through catalyst substrates. We review herein some key advancements in catalyst design that have been achieved in the recent past, and highlight considerations critical to the novel mode of reactor operation proposed. We provide an overview of the various types of electrically heated catalysts proposed, methods used in their synthesis, and reactor performance of Joule-heated catalysts for a variety of applications. Also discussed are key knowledge gaps that will likely need to be addressed in an effort to accelerate deployment of this emerging class of reactors that could play a pivotal role in the decarbonization of energy-intensive large-scale chemical processes.

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Simulation and experimental analysis on the development of a co-axial cylindrical methane steam reformer using an electrically heated alumite catalyst

Cited by 30 publications

References 16 publications

Numerical investigations on the development of plate reformers: Comparison of different assignments of the chambers

Numerical investigations on the development of plate reformers: Comparison of different assignments of the chambers

Joule-Heated Catalytic Reactors toward Decarbonization and Process Intensification: A Review

Electrified Catalysts for Endothermic Chemical Processes: Materials Needs, Advances, and Challenges

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