Oxidative coupling of methane: a comparison of different reactor configurations

Aitor Cruellas, Tommaso Melchiori, Fausto Gallucci, Martin van Sint Annaland (Corresponding author)

Research output: Contribution to journalArticleAcademicpeer-review

1 Citation (Scopus)

Abstract

A quantitative comparison of the performance of the most common reactor configurations proposed for the oxidative coupling of methane (OCM) is made on the basis of numerical calculations with phenomenological reactor models. The configurations that are analyzed can be divided into two main categories, namely, packed-bed reactors (including conventional packed beds with external cooling, packed-bed membrane reactors, and adiabatic packed beds with post cracking) and fluidized bed reactors (bubbling fluidized bed reactor, circulating fluidized bed reactor, and fluidized bed membrane reactor). The challenges in both configuration types, mainly the heat management in the case of the packed-bed reactors and the low C 2+ yields obtained in fluidized bed reactors, are evaluated and quantified. To ensure a fair comparison, La 2 O 3 /CaO is chosen as the OCM catalyst for all the considered cases, mainly in view of the availability of a comprehensive kinetics model. The results show that, with conventional configurations, it is not possible to achieve high C 2+ yields that are needed to make the process economically viable. However, the results also indicate that the C 2+ yield can be significantly improved by feeding the oxygen distributively along the reactor axial length.

Original languageEnglish
Article number1900148
JournalEnergy Technology
DOIs
Publication statusE-pub ahead of print - 1 Jan 2019

Fingerprint

Packed beds
Fluidized beds
Methane
Membranes
Availability
Cooling
Catalysts
Kinetics
Oxygen

Keywords

  • membrane reactors
  • oxidative coupling of methane
  • reactor selection

Cite this

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title = "Oxidative coupling of methane: a comparison of different reactor configurations",
abstract = "A quantitative comparison of the performance of the most common reactor configurations proposed for the oxidative coupling of methane (OCM) is made on the basis of numerical calculations with phenomenological reactor models. The configurations that are analyzed can be divided into two main categories, namely, packed-bed reactors (including conventional packed beds with external cooling, packed-bed membrane reactors, and adiabatic packed beds with post cracking) and fluidized bed reactors (bubbling fluidized bed reactor, circulating fluidized bed reactor, and fluidized bed membrane reactor). The challenges in both configuration types, mainly the heat management in the case of the packed-bed reactors and the low C 2+ yields obtained in fluidized bed reactors, are evaluated and quantified. To ensure a fair comparison, La 2 O 3 /CaO is chosen as the OCM catalyst for all the considered cases, mainly in view of the availability of a comprehensive kinetics model. The results show that, with conventional configurations, it is not possible to achieve high C 2+ yields that are needed to make the process economically viable. However, the results also indicate that the C 2+ yield can be significantly improved by feeding the oxygen distributively along the reactor axial length.",
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Oxidative coupling of methane : a comparison of different reactor configurations. / Cruellas, Aitor; Melchiori, Tommaso; Gallucci, Fausto; van Sint Annaland, Martin (Corresponding author).

In: Energy Technology, 01.01.2019.

Research output: Contribution to journalArticleAcademicpeer-review

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N2 - A quantitative comparison of the performance of the most common reactor configurations proposed for the oxidative coupling of methane (OCM) is made on the basis of numerical calculations with phenomenological reactor models. The configurations that are analyzed can be divided into two main categories, namely, packed-bed reactors (including conventional packed beds with external cooling, packed-bed membrane reactors, and adiabatic packed beds with post cracking) and fluidized bed reactors (bubbling fluidized bed reactor, circulating fluidized bed reactor, and fluidized bed membrane reactor). The challenges in both configuration types, mainly the heat management in the case of the packed-bed reactors and the low C 2+ yields obtained in fluidized bed reactors, are evaluated and quantified. To ensure a fair comparison, La 2 O 3 /CaO is chosen as the OCM catalyst for all the considered cases, mainly in view of the availability of a comprehensive kinetics model. The results show that, with conventional configurations, it is not possible to achieve high C 2+ yields that are needed to make the process economically viable. However, the results also indicate that the C 2+ yield can be significantly improved by feeding the oxygen distributively along the reactor axial length.

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