Promoting gas production by controlling the interaction of volatiles with char during coal gasification in a circulating fluidized bed gasification reactor

Koichi Matsuoka, Sou Hosokai, Yoshishige Kato, Koji Kuramoto, Yoshizo Suzuki, Koyo Norinaga, Jun Ichiro Hayashi

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

A novel circulating fluidized bed (CFB) gasifier, which consists of a downer and two bubbling fluidized beds, was developed. Coal is continuously pyrolyzed in the downer and the resultant char is sent to the bubbling bed gasifier for steam gasification while evacuation of the volatiles avoids the char-volatile interactions. Any ungasified char is transferred from the gasifier to the bubbling bed combustor, where it is either completely combusted or partially combusted and then recycled to the downer. Steam gasification was successfully performed in the absence of pyrolysis-derived volatiles, which strongly inhibit gasification. The recycling of the partially combusted char greatly increased its concentration in the downer thereby enhancing the reforming of the volatiles, in particular that of tar over that of char, and the resultant gas formation. The total yield of gases from the downer and bubbling bed gasifier was 45% higher than that obtained under direct feeding of the coal into the bubbling bed gasifier and full combustion of the char, i.e., with steam gasification of char in the presence of volatiles and subsequent reforming over char at a much lower concentration.

Original languageEnglish
Pages (from-to)308-316
Number of pages9
JournalFuel Processing Technology
Volume116
DOIs
Publication statusPublished - Sep 3 2013
Externally publishedYes

Fingerprint

Coal gasification
Gasification
Fluidized beds
Steam
Gases
Coal
Reforming reactions
Tars
Tar
Combustors
Recycling
Pyrolysis

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology

Cite this

Promoting gas production by controlling the interaction of volatiles with char during coal gasification in a circulating fluidized bed gasification reactor. / Matsuoka, Koichi; Hosokai, Sou; Kato, Yoshishige; Kuramoto, Koji; Suzuki, Yoshizo; Norinaga, Koyo; Hayashi, Jun Ichiro.

In: Fuel Processing Technology, Vol. 116, 03.09.2013, p. 308-316.

Research output: Contribution to journalArticle

Matsuoka, Koichi ; Hosokai, Sou ; Kato, Yoshishige ; Kuramoto, Koji ; Suzuki, Yoshizo ; Norinaga, Koyo ; Hayashi, Jun Ichiro. / Promoting gas production by controlling the interaction of volatiles with char during coal gasification in a circulating fluidized bed gasification reactor. In: Fuel Processing Technology. 2013 ; Vol. 116. pp. 308-316.
@article{557070df6a0442e684b83b139dd1ffde,
title = "Promoting gas production by controlling the interaction of volatiles with char during coal gasification in a circulating fluidized bed gasification reactor",
abstract = "A novel circulating fluidized bed (CFB) gasifier, which consists of a downer and two bubbling fluidized beds, was developed. Coal is continuously pyrolyzed in the downer and the resultant char is sent to the bubbling bed gasifier for steam gasification while evacuation of the volatiles avoids the char-volatile interactions. Any ungasified char is transferred from the gasifier to the bubbling bed combustor, where it is either completely combusted or partially combusted and then recycled to the downer. Steam gasification was successfully performed in the absence of pyrolysis-derived volatiles, which strongly inhibit gasification. The recycling of the partially combusted char greatly increased its concentration in the downer thereby enhancing the reforming of the volatiles, in particular that of tar over that of char, and the resultant gas formation. The total yield of gases from the downer and bubbling bed gasifier was 45{\%} higher than that obtained under direct feeding of the coal into the bubbling bed gasifier and full combustion of the char, i.e., with steam gasification of char in the presence of volatiles and subsequent reforming over char at a much lower concentration.",
author = "Koichi Matsuoka and Sou Hosokai and Yoshishige Kato and Koji Kuramoto and Yoshizo Suzuki and Koyo Norinaga and Hayashi, {Jun Ichiro}",
year = "2013",
month = "9",
day = "3",
doi = "10.1016/j.fuproc.2013.07.017",
language = "English",
volume = "116",
pages = "308--316",
journal = "Fuel Processing Technology",
issn = "0378-3820",
publisher = "Elsevier",

}

TY - JOUR

T1 - Promoting gas production by controlling the interaction of volatiles with char during coal gasification in a circulating fluidized bed gasification reactor

AU - Matsuoka, Koichi

AU - Hosokai, Sou

AU - Kato, Yoshishige

AU - Kuramoto, Koji

AU - Suzuki, Yoshizo

AU - Norinaga, Koyo

AU - Hayashi, Jun Ichiro

PY - 2013/9/3

Y1 - 2013/9/3

N2 - A novel circulating fluidized bed (CFB) gasifier, which consists of a downer and two bubbling fluidized beds, was developed. Coal is continuously pyrolyzed in the downer and the resultant char is sent to the bubbling bed gasifier for steam gasification while evacuation of the volatiles avoids the char-volatile interactions. Any ungasified char is transferred from the gasifier to the bubbling bed combustor, where it is either completely combusted or partially combusted and then recycled to the downer. Steam gasification was successfully performed in the absence of pyrolysis-derived volatiles, which strongly inhibit gasification. The recycling of the partially combusted char greatly increased its concentration in the downer thereby enhancing the reforming of the volatiles, in particular that of tar over that of char, and the resultant gas formation. The total yield of gases from the downer and bubbling bed gasifier was 45% higher than that obtained under direct feeding of the coal into the bubbling bed gasifier and full combustion of the char, i.e., with steam gasification of char in the presence of volatiles and subsequent reforming over char at a much lower concentration.

AB - A novel circulating fluidized bed (CFB) gasifier, which consists of a downer and two bubbling fluidized beds, was developed. Coal is continuously pyrolyzed in the downer and the resultant char is sent to the bubbling bed gasifier for steam gasification while evacuation of the volatiles avoids the char-volatile interactions. Any ungasified char is transferred from the gasifier to the bubbling bed combustor, where it is either completely combusted or partially combusted and then recycled to the downer. Steam gasification was successfully performed in the absence of pyrolysis-derived volatiles, which strongly inhibit gasification. The recycling of the partially combusted char greatly increased its concentration in the downer thereby enhancing the reforming of the volatiles, in particular that of tar over that of char, and the resultant gas formation. The total yield of gases from the downer and bubbling bed gasifier was 45% higher than that obtained under direct feeding of the coal into the bubbling bed gasifier and full combustion of the char, i.e., with steam gasification of char in the presence of volatiles and subsequent reforming over char at a much lower concentration.

UR - http://www.scopus.com/inward/record.url?scp=84883155913&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84883155913&partnerID=8YFLogxK

U2 - 10.1016/j.fuproc.2013.07.017

DO - 10.1016/j.fuproc.2013.07.017

M3 - Article

AN - SCOPUS:84883155913

VL - 116

SP - 308

EP - 316

JO - Fuel Processing Technology

JF - Fuel Processing Technology

SN - 0378-3820

ER -