Direct conversion from methane to methanol for high efficiency energy system with exergy regeneration

K. Okazaki, T. Kishida, Kuniyasu Ogawa, T. Nozaki

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

Direct synthesis of methanol from methane and water vapor mixtures has a high possibility to realize a highly sophisticated energy recycling system with exergy regeneration. Because, combined with a reforming process from methanol to hydrogen, exergy rate of low temperature thermal energy sources at about 100 °C can be enhanced to high quality chemical energy in hydrogen. For realizing this newly proposed energy system, direct synthesis of methanol from methane and water-vapor mixture has been successfully realized by non-equilibrium plasma chemical reactions under atmospheric pressure using a newly developed ultra-short pulsed barrier discharge in an extremely thin glass tube reactor. Various effects of reaction time, water-vapor concentration and discharge parameters on the conversion efficiency and reaction selectivity have been clarified. Methanol yield has reached the order of 1% at the water-vapor concentration of about 50%, and it has been proposed that the value can be largely enhanced by adding rare gas such as Kr or Ar to the source gas. Possible mechanisms for this effect have been also discussed.

Original languageEnglish
Pages (from-to)1459-1468
Number of pages10
JournalEnergy Conversion and Management
Volume43
Issue number9-12
DOIs
Publication statusPublished - 2002 Jun
Externally publishedYes

Fingerprint

Exergy
Water vapor
Energy efficiency
Methane
Methanol
Hydrogen
Reforming reactions
Inert gases
Thermal energy
Conversion efficiency
Atmospheric pressure
Recycling
Chemical reactions
Plasmas
Glass
Gases
Temperature

Keywords

  • Exergy enhancement
  • Hydrogen
  • Methanol synthesis
  • Non-equilibrium plasma
  • Plasma chemistry
  • Reforming process

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Fuel Technology
  • Nuclear Energy and Engineering
  • Renewable Energy, Sustainability and the Environment

Cite this

Direct conversion from methane to methanol for high efficiency energy system with exergy regeneration. / Okazaki, K.; Kishida, T.; Ogawa, Kuniyasu; Nozaki, T.

In: Energy Conversion and Management, Vol. 43, No. 9-12, 06.2002, p. 1459-1468.

Research output: Contribution to journalArticle

@article{fbc003d8f5964ebeb9886c03f1d289de,
title = "Direct conversion from methane to methanol for high efficiency energy system with exergy regeneration",
abstract = "Direct synthesis of methanol from methane and water vapor mixtures has a high possibility to realize a highly sophisticated energy recycling system with exergy regeneration. Because, combined with a reforming process from methanol to hydrogen, exergy rate of low temperature thermal energy sources at about 100 °C can be enhanced to high quality chemical energy in hydrogen. For realizing this newly proposed energy system, direct synthesis of methanol from methane and water-vapor mixture has been successfully realized by non-equilibrium plasma chemical reactions under atmospheric pressure using a newly developed ultra-short pulsed barrier discharge in an extremely thin glass tube reactor. Various effects of reaction time, water-vapor concentration and discharge parameters on the conversion efficiency and reaction selectivity have been clarified. Methanol yield has reached the order of 1{\%} at the water-vapor concentration of about 50{\%}, and it has been proposed that the value can be largely enhanced by adding rare gas such as Kr or Ar to the source gas. Possible mechanisms for this effect have been also discussed.",
keywords = "Exergy enhancement, Hydrogen, Methanol synthesis, Non-equilibrium plasma, Plasma chemistry, Reforming process",
author = "K. Okazaki and T. Kishida and Kuniyasu Ogawa and T. Nozaki",
year = "2002",
month = "6",
doi = "10.1016/S0196-8904(02)00028-6",
language = "English",
volume = "43",
pages = "1459--1468",
journal = "Energy Conversion and Management",
issn = "0196-8904",
publisher = "Elsevier Limited",
number = "9-12",

}

TY - JOUR

T1 - Direct conversion from methane to methanol for high efficiency energy system with exergy regeneration

AU - Okazaki, K.

AU - Kishida, T.

AU - Ogawa, Kuniyasu

AU - Nozaki, T.

PY - 2002/6

Y1 - 2002/6

N2 - Direct synthesis of methanol from methane and water vapor mixtures has a high possibility to realize a highly sophisticated energy recycling system with exergy regeneration. Because, combined with a reforming process from methanol to hydrogen, exergy rate of low temperature thermal energy sources at about 100 °C can be enhanced to high quality chemical energy in hydrogen. For realizing this newly proposed energy system, direct synthesis of methanol from methane and water-vapor mixture has been successfully realized by non-equilibrium plasma chemical reactions under atmospheric pressure using a newly developed ultra-short pulsed barrier discharge in an extremely thin glass tube reactor. Various effects of reaction time, water-vapor concentration and discharge parameters on the conversion efficiency and reaction selectivity have been clarified. Methanol yield has reached the order of 1% at the water-vapor concentration of about 50%, and it has been proposed that the value can be largely enhanced by adding rare gas such as Kr or Ar to the source gas. Possible mechanisms for this effect have been also discussed.

AB - Direct synthesis of methanol from methane and water vapor mixtures has a high possibility to realize a highly sophisticated energy recycling system with exergy regeneration. Because, combined with a reforming process from methanol to hydrogen, exergy rate of low temperature thermal energy sources at about 100 °C can be enhanced to high quality chemical energy in hydrogen. For realizing this newly proposed energy system, direct synthesis of methanol from methane and water-vapor mixture has been successfully realized by non-equilibrium plasma chemical reactions under atmospheric pressure using a newly developed ultra-short pulsed barrier discharge in an extremely thin glass tube reactor. Various effects of reaction time, water-vapor concentration and discharge parameters on the conversion efficiency and reaction selectivity have been clarified. Methanol yield has reached the order of 1% at the water-vapor concentration of about 50%, and it has been proposed that the value can be largely enhanced by adding rare gas such as Kr or Ar to the source gas. Possible mechanisms for this effect have been also discussed.

KW - Exergy enhancement

KW - Hydrogen

KW - Methanol synthesis

KW - Non-equilibrium plasma

KW - Plasma chemistry

KW - Reforming process

UR - http://www.scopus.com/inward/record.url?scp=0036591754&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036591754&partnerID=8YFLogxK

U2 - 10.1016/S0196-8904(02)00028-6

DO - 10.1016/S0196-8904(02)00028-6

M3 - Article

VL - 43

SP - 1459

EP - 1468

JO - Energy Conversion and Management

JF - Energy Conversion and Management

SN - 0196-8904

IS - 9-12

ER -