Corrigendum to “Exergoeconomic analysis of an HCCI engine polygeneration process” [Energy Convers. Manage. 203 (2020) 112085]

Schröder, Dominik; Hegner, Robert; Güngör, Ali; Atakan, Burak

doi:10.1016/j.enconman.2021.114490

Cited by 1 publication

(3 citation statements)

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“…The inlet pressure was set to 1.2 bar because a lower intake pressure would lead to outlet pressures below 1 bar due to the endothermic reactions and exergy losses, as found in previous studies. [14,17] The CO 2 /CH 4 ratio was varied up to 1.5, leading to a changing CO/H 2 ratio in the product gas and effecting work demand, entropy production, and product spectrum, shown in Section 3.…”

Section: Methodsmentioning

confidence: 99%

“…The homogeneous process can often convert gas mixtures containing compounds which poison the catalyst (e.g., sulfur-containing compounds) without pre-cleaning. The feasibility of an ICE for polygeneration processes and exergy storage has been proven in several publications, [12][13][14][15] considering thermodynamics, kinetics, and economics. In polygeneration, methane is partially oxidized at equivalence ratios of up to 7; for exergy storage, methane is pyrolyzed.…”

Section: Introductionmentioning

confidence: 99%

“…[ 16 ] For the separation of H 2 , H 2 membranes or pressure swing adsorption units have already proven successful. [ 14 ] The separation of higher hydrocarbons like benzene could be realized by a cold trap. To evaluate the potentials of the piston engine as the key process, this work does not evaluate or discuss the preprocesses, the subsequent processes, and the energy supply for motoring the piston engine.…”

Section: Introductionmentioning

confidence: 99%

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Dry Methane Reforming in a Piston Engine for Chemical Energy Storage and Carbon Dioxide Utilization: Kinetic Modeling and Thermodynamic Evaluation

Rudolph

Atakan

2023

Energy Tech

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The flexible energy conversion in piston engines offers one possibility for storing energy from renewable sources. This work theoretically explores the engine‐based dry methane reforming converting mechanical energy into chemical energy. The endothermic, endergonic reforming process is activated by the temperature increase during the compression stroke, assisted by a reduction of the heat capacity through dilution with argon. This leads to an increase in chemical exergy, as higher‐exergy species are produced with small exergy losses while simultaneously consuming CO2. The engine‐based homogenous dry reforming serves as a flexible power‐to‐gas process and energy storage solution, presenting an alternative to catalytic processes. The piston engine is simulated using a time‐dependent single‐zone model with detailed chemical kinetics, followed by an analysis of thermodynamics and kinetics. With inlet temperatures ranging from 423–473 K and argon dilutions of 91–94 mol%, CH4 and CO2 conversion are between 50%–90% and 30%–80%, respectively, resulting in synthesis gas yields of 45–55%. Additionally, higher hydrocarbons such as C2H2, C2H4, and C6H6 are produced with yields of up to 20%, 10%, and 10%. So, this power‐to‐gas process allows for exergy storage of up to 3.35 kW L−1 per cycle with an efficiency of up to 75%.

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Section: Methodsmentioning

confidence: 99%