Study on the unsteady state oxidative coupling of methane: Effects of oxygen species from O2, surface lattice oxygen, and CO2on the C2+selectivity

Suji Yoon; Seoyeon Lim; Jae Wook Choi; Dong Jin Suh; Kwang Ho Song; Jeong Myeong Ha

doi:10.1039/d0ra06065h

Study on the unsteady state oxidative coupling of methane: Effects of oxygen species from O₂, surface lattice oxygen, and CO₂on the C₂₊selectivity

Suji Yoon, Seoyeon Lim, Jae Wook Choi, Dong Jin Suh, Kwang Ho Song, Jeong Myeong Ha

Department of Chemical and Biological Engineering

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

This study examined the effects of oxygen species on the unsteady-state oxidative coupling of methane (OCM) using a lengthy catalyst bed of Na2WO4/Mn/SiO2. The reaction conditions, including the methane-to-oxygen ratio, ratio of feed gas dilution by N2, quantity of catalyst, and feed flow rate were adjusted for the continuous flow fixed bed reaction system. While the O2 gas initiated methyl radical formation from methane, the surface lattice oxygen atoms improved the dehydrogenation of paraffins to olefins without significant activation of methane. The addition of CO2 as a mild oxidizing agent was also tested and slightly improved OCM selectivity with slightly lower methane conversion were observed.

Original language	English
Pages (from-to)	35889-35897
Number of pages	9
Journal	RSC Advances
Volume	10
Issue number	59
DOIs	https://doi.org/10.1039/d0ra06065h
Publication status	Published - 2020 Sept 30

Bibliographical note

Funding Information:
This research was supported by C1 Gas Renery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (2015M3D3A1A01064900).

Publisher Copyright:
© The Royal Society of Chemistry.

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering

Access to Document

10.1039/d0ra06065h

Cite this

@article{ec068583fef44fcd8132cca9772c6702,

title = "Study on the unsteady state oxidative coupling of methane: Effects of oxygen species from O2, surface lattice oxygen, and CO2on the C2+selectivity",

abstract = "This study examined the effects of oxygen species on the unsteady-state oxidative coupling of methane (OCM) using a lengthy catalyst bed of Na2WO4/Mn/SiO2. The reaction conditions, including the methane-to-oxygen ratio, ratio of feed gas dilution by N2, quantity of catalyst, and feed flow rate were adjusted for the continuous flow fixed bed reaction system. While the O2 gas initiated methyl radical formation from methane, the surface lattice oxygen atoms improved the dehydrogenation of paraffins to olefins without significant activation of methane. The addition of CO2 as a mild oxidizing agent was also tested and slightly improved OCM selectivity with slightly lower methane conversion were observed.",

author = "Suji Yoon and Seoyeon Lim and Choi, {Jae Wook} and Suh, {Dong Jin} and Song, {Kwang Ho} and Ha, {Jeong Myeong}",

note = "Funding Information: This research was supported by C1 Gas Renery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (2015M3D3A1A01064900). Publisher Copyright: {\textcopyright} The Royal Society of Chemistry.",

year = "2020",

month = sep,

day = "30",

doi = "10.1039/d0ra06065h",

language = "English",

volume = "10",

pages = "35889--35897",

journal = "RSC Advances",

issn = "2046-2069",

publisher = "Royal Society of Chemistry",

number = "59",

}

TY - JOUR

T1 - Study on the unsteady state oxidative coupling of methane

T2 - Effects of oxygen species from O2, surface lattice oxygen, and CO2on the C2+selectivity

AU - Yoon, Suji

AU - Lim, Seoyeon

AU - Choi, Jae Wook

AU - Suh, Dong Jin

AU - Song, Kwang Ho

AU - Ha, Jeong Myeong

N1 - Funding Information: This research was supported by C1 Gas Renery Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science and ICT (2015M3D3A1A01064900). Publisher Copyright: © The Royal Society of Chemistry.

PY - 2020/9/30

Y1 - 2020/9/30

N2 - This study examined the effects of oxygen species on the unsteady-state oxidative coupling of methane (OCM) using a lengthy catalyst bed of Na2WO4/Mn/SiO2. The reaction conditions, including the methane-to-oxygen ratio, ratio of feed gas dilution by N2, quantity of catalyst, and feed flow rate were adjusted for the continuous flow fixed bed reaction system. While the O2 gas initiated methyl radical formation from methane, the surface lattice oxygen atoms improved the dehydrogenation of paraffins to olefins without significant activation of methane. The addition of CO2 as a mild oxidizing agent was also tested and slightly improved OCM selectivity with slightly lower methane conversion were observed.

AB - This study examined the effects of oxygen species on the unsteady-state oxidative coupling of methane (OCM) using a lengthy catalyst bed of Na2WO4/Mn/SiO2. The reaction conditions, including the methane-to-oxygen ratio, ratio of feed gas dilution by N2, quantity of catalyst, and feed flow rate were adjusted for the continuous flow fixed bed reaction system. While the O2 gas initiated methyl radical formation from methane, the surface lattice oxygen atoms improved the dehydrogenation of paraffins to olefins without significant activation of methane. The addition of CO2 as a mild oxidizing agent was also tested and slightly improved OCM selectivity with slightly lower methane conversion were observed.

UR - http://www.scopus.com/inward/record.url?scp=85093697457&partnerID=8YFLogxK

U2 - 10.1039/d0ra06065h

DO - 10.1039/d0ra06065h

M3 - Article

AN - SCOPUS:85093697457

SN - 2046-2069

VL - 10

SP - 35889

EP - 35897

JO - RSC Advances

JF - RSC Advances

IS - 59

ER -