Mapping of operating windows for methane and ethane pyrolysis in the pulsed compression reactor by experiments and modelling

Slotboom, Yordi; Kersten, Sascha R.A.

doi:10.1016/j.cej.2023.143522

Cited by 3 publications

(2 citation statements)

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“…Interestingly, none of the detailed kinetic models (GRI-MECH 3.0, AramcoMech 2.0, etc.) are able to describe the pyrolysis of methane in the 730-2730 • C range, at least not at high pressures [64]. This is not a surprise as these models were developed for high-temperature processes in the presence of oxygen (combustion), and without considering the formation of polycyclic aromatic hydrocarbons, i.e., the precursors for solid carbon formation [65].…”

Section: Homogeneous Gas-phase Methane Pyrolysis Kineticsmentioning

confidence: 99%

“…As with the PHQ concept of Dong et al [94], the reaction is not selective for carbonaceous solid products, but since benzene is formed, we can expect that we are not too far from soot precursors and coke formation. A pulsed compression reactor (PCR) able to reach 600 bar in a single pulse was also recently described for that purpose [64].…”

Section: Fluidization Gasmentioning

confidence: 99%

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Combined Methane Pyrolysis and Solid Carbon Gasification for Electrified CO2-Free Hydrogen and Syngas Production

Perreault,

Boruntea,

Dhawan Yadav

et al. 2023

Energies

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The coupling of methane pyrolysis with the gasification of a solid carbon byproduct provides CO2-free hydrogen and hydrogen-rich syngas, eliminating the conundrum of carbon utilization. Firstly, the various types of carbon that are known to result during the pyrolysis process and their dependencies on the reaction conditions for catalytic and noncatalytic systems are summarized. The synchronization of the reactions’ kinetics is considered to be of paramount importance for efficient performance. This translates to the necessity of finding suitable reaction conditions, carbon reactivities, and catalysts that might enable control over competing reactions through the manipulation of the reaction rates. As a consequence, the reaction kinetics of methane pyrolysis is then emphasized, followed by the particularities of carbon deposition and the kinetics of carbon gasification. Given the urgency in finding suitable solutions for decarbonizing the energy sector and the limited information on the gasification of pyrolytic carbon, more research is needed and encouraged in this area. In order to provide CO2-free hydrogen production, the reaction heat should also be provided without CO2. Electrification is one of the solutions, provided that low-carbon sources are used to generate the electricity. Power-to-heat, i.e., where electricity is used for heating, represents the first step for the chemical industry.

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Section: Homogeneous Gas-phase Methane Pyrolysis Kineticsmentioning

confidence: 99%

Section: Fluidization Gasmentioning

confidence: 99%