Promotion of nitrogen removal during coal pyrolysis by using iron catalyst impregnated by solvent swelling method

J. I. Hayashi, K. Kusakabe, S. Morooka, E. Furimsky

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

This chapter discusses two organometallic iron precursors––ferric acetate and ferrocene––which are impregnated into three coals of different ranks swollen in polar organic solvents. The iron-impregnated coals are subjected to slow atmospheric pyrolysis. The effect of the incorporated iron species on the fate of nitrogen is quantitatively examined. Nitrogen evolved as hydrogen cyanide (HCN), ammonia (NH3), and tar in the initial pyrolysis period is the primary contributor to NOx generated in following combustion stage. Thus, the selective conversion of coal nitrogen into N2 in the pyrolysis stage is effective for suppressing NOx emission. The selective increase of N2 is balanced by the reduction of nitrogen evolved as HCN, tar, and that fixed in char. Iron catalyst precursors is located in micropores prior to pyrolysis to contact the coal matrix at molecular level for promoting pyrolytic removal of coal nitrogen. Brown coals contain much carboxyl groups as cation exchange sites. Iron (Fe3+) ions are easily incorporated into the coal matrix through ion exchange.

Original languageEnglish
Pages (from-to)1697-1700
Number of pages4
JournalCoal Science and Technology
Volume24
Issue numberC
DOIs
Publication statusPublished - Jan 1 1995

Fingerprint

Nitrogen removal
Swelling
Pyrolysis
Coal
Iron
Catalysts
Nitrogen
Tar
Cyanides
Ion exchange
Hydrogen
Lignite
Organometallics
Organic solvents
Ammonia
Positive ions
Ions

All Science Journal Classification (ASJC) codes

  • Energy(all)

Cite this

Promotion of nitrogen removal during coal pyrolysis by using iron catalyst impregnated by solvent swelling method. / Hayashi, J. I.; Kusakabe, K.; Morooka, S.; Furimsky, E.

In: Coal Science and Technology, Vol. 24, No. C, 01.01.1995, p. 1697-1700.

Research output: Contribution to journalArticle

@article{b6ea43d18b2d4d24ac8062ecfd9365cb,
title = "Promotion of nitrogen removal during coal pyrolysis by using iron catalyst impregnated by solvent swelling method",
abstract = "This chapter discusses two organometallic iron precursors––ferric acetate and ferrocene––which are impregnated into three coals of different ranks swollen in polar organic solvents. The iron-impregnated coals are subjected to slow atmospheric pyrolysis. The effect of the incorporated iron species on the fate of nitrogen is quantitatively examined. Nitrogen evolved as hydrogen cyanide (HCN), ammonia (NH3), and tar in the initial pyrolysis period is the primary contributor to NOx generated in following combustion stage. Thus, the selective conversion of coal nitrogen into N2 in the pyrolysis stage is effective for suppressing NOx emission. The selective increase of N2 is balanced by the reduction of nitrogen evolved as HCN, tar, and that fixed in char. Iron catalyst precursors is located in micropores prior to pyrolysis to contact the coal matrix at molecular level for promoting pyrolytic removal of coal nitrogen. Brown coals contain much carboxyl groups as cation exchange sites. Iron (Fe3+) ions are easily incorporated into the coal matrix through ion exchange.",
author = "Hayashi, {J. I.} and K. Kusakabe and S. Morooka and E. Furimsky",
year = "1995",
month = "1",
day = "1",
doi = "10.1016/S0167-9449(06)80140-0",
language = "English",
volume = "24",
pages = "1697--1700",
journal = "Coal Science and Technology",
issn = "0167-9449",
number = "C",

}

TY - JOUR

T1 - Promotion of nitrogen removal during coal pyrolysis by using iron catalyst impregnated by solvent swelling method

AU - Hayashi, J. I.

AU - Kusakabe, K.

AU - Morooka, S.

AU - Furimsky, E.

PY - 1995/1/1

Y1 - 1995/1/1

N2 - This chapter discusses two organometallic iron precursors––ferric acetate and ferrocene––which are impregnated into three coals of different ranks swollen in polar organic solvents. The iron-impregnated coals are subjected to slow atmospheric pyrolysis. The effect of the incorporated iron species on the fate of nitrogen is quantitatively examined. Nitrogen evolved as hydrogen cyanide (HCN), ammonia (NH3), and tar in the initial pyrolysis period is the primary contributor to NOx generated in following combustion stage. Thus, the selective conversion of coal nitrogen into N2 in the pyrolysis stage is effective for suppressing NOx emission. The selective increase of N2 is balanced by the reduction of nitrogen evolved as HCN, tar, and that fixed in char. Iron catalyst precursors is located in micropores prior to pyrolysis to contact the coal matrix at molecular level for promoting pyrolytic removal of coal nitrogen. Brown coals contain much carboxyl groups as cation exchange sites. Iron (Fe3+) ions are easily incorporated into the coal matrix through ion exchange.

AB - This chapter discusses two organometallic iron precursors––ferric acetate and ferrocene––which are impregnated into three coals of different ranks swollen in polar organic solvents. The iron-impregnated coals are subjected to slow atmospheric pyrolysis. The effect of the incorporated iron species on the fate of nitrogen is quantitatively examined. Nitrogen evolved as hydrogen cyanide (HCN), ammonia (NH3), and tar in the initial pyrolysis period is the primary contributor to NOx generated in following combustion stage. Thus, the selective conversion of coal nitrogen into N2 in the pyrolysis stage is effective for suppressing NOx emission. The selective increase of N2 is balanced by the reduction of nitrogen evolved as HCN, tar, and that fixed in char. Iron catalyst precursors is located in micropores prior to pyrolysis to contact the coal matrix at molecular level for promoting pyrolytic removal of coal nitrogen. Brown coals contain much carboxyl groups as cation exchange sites. Iron (Fe3+) ions are easily incorporated into the coal matrix through ion exchange.

UR - http://www.scopus.com/inward/record.url?scp=77957803206&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77957803206&partnerID=8YFLogxK

U2 - 10.1016/S0167-9449(06)80140-0

DO - 10.1016/S0167-9449(06)80140-0

M3 - Article

AN - SCOPUS:77957803206

VL - 24

SP - 1697

EP - 1700

JO - Coal Science and Technology

JF - Coal Science and Technology

SN - 0167-9449

IS - C

ER -