Catalysis of the combustion of synthetic char particles by various forms of calcium additives

Y. A. Levendis, S. W. Nam, SukWoo Nam, R. C. Flagan, G. R. Gavalas

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

The reactivity of calcium-laden carbonaceous particles to oxygen was investigated in the range 670-3000 K. The char particles were prepared from poly(furfural alcohol) (PFA) and were spherical and of uniform size. Three different methods were used to introduce the calcium additive: precipitation of calcium carbonate, impregnation with calcium acetate, and calcium ion exchange. Electron microscopy showed that the distribution of calcium was remarkably uniform in particles containing a bimodal distribution of micropores and transitional pores, whereas for particles with micropores only the Ca concentration was high at the surface and low at the center. X-ray analysis indicated that the conversion of the carbonate to the oxide at low temperatures (below 900 K) takes place only after all carbon has been consumed. Combustion studies showed that the calcium catalyzed the oxidation reaction at all temperatures investigated by up to 2 orders of magnitude. The effectiveness of the catalyst introduced by the different methods was comparable, with the calcium ion exchanged chars being, in general, the most reactive.

Original languageEnglish
Pages (from-to)28-37
Number of pages10
JournalEnergy and Fuels
Volume3
Issue number1
Publication statusPublished - 1989 Jan 1
Externally publishedYes

Fingerprint

Catalysis
Calcium
calcium acetate
Furaldehyde
Calcium Carbonate
Carbonates
X ray analysis
Furfural
Impregnation
Oxides
Calcium carbonate
Electron microscopy
Ion exchange
Carbon
Alcohols
Ions
Oxygen
Oxidation
Temperature
Catalysts

ASJC Scopus subject areas

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

Cite this

Levendis, Y. A., Nam, S. W., Nam, S., Flagan, R. C., & Gavalas, G. R. (1989). Catalysis of the combustion of synthetic char particles by various forms of calcium additives. Energy and Fuels, 3(1), 28-37.

Catalysis of the combustion of synthetic char particles by various forms of calcium additives. / Levendis, Y. A.; Nam, S. W.; Nam, SukWoo; Flagan, R. C.; Gavalas, G. R.

In: Energy and Fuels, Vol. 3, No. 1, 01.01.1989, p. 28-37.

Research output: Contribution to journalArticle

Levendis, YA, Nam, SW, Nam, S, Flagan, RC & Gavalas, GR 1989, 'Catalysis of the combustion of synthetic char particles by various forms of calcium additives', Energy and Fuels, vol. 3, no. 1, pp. 28-37.
Levendis YA, Nam SW, Nam S, Flagan RC, Gavalas GR. Catalysis of the combustion of synthetic char particles by various forms of calcium additives. Energy and Fuels. 1989 Jan 1;3(1):28-37.
Levendis, Y. A. ; Nam, S. W. ; Nam, SukWoo ; Flagan, R. C. ; Gavalas, G. R. / Catalysis of the combustion of synthetic char particles by various forms of calcium additives. In: Energy and Fuels. 1989 ; Vol. 3, No. 1. pp. 28-37.
@article{43b4631d88344b3da0ff16376b1d52c9,
title = "Catalysis of the combustion of synthetic char particles by various forms of calcium additives",
abstract = "The reactivity of calcium-laden carbonaceous particles to oxygen was investigated in the range 670-3000 K. The char particles were prepared from poly(furfural alcohol) (PFA) and were spherical and of uniform size. Three different methods were used to introduce the calcium additive: precipitation of calcium carbonate, impregnation with calcium acetate, and calcium ion exchange. Electron microscopy showed that the distribution of calcium was remarkably uniform in particles containing a bimodal distribution of micropores and transitional pores, whereas for particles with micropores only the Ca concentration was high at the surface and low at the center. X-ray analysis indicated that the conversion of the carbonate to the oxide at low temperatures (below 900 K) takes place only after all carbon has been consumed. Combustion studies showed that the calcium catalyzed the oxidation reaction at all temperatures investigated by up to 2 orders of magnitude. The effectiveness of the catalyst introduced by the different methods was comparable, with the calcium ion exchanged chars being, in general, the most reactive.",
author = "Levendis, {Y. A.} and Nam, {S. W.} and SukWoo Nam and Flagan, {R. C.} and Gavalas, {G. R.}",
year = "1989",
month = "1",
day = "1",
language = "English",
volume = "3",
pages = "28--37",
journal = "Energy and Fuels",
issn = "0887-0624",
publisher = "American Chemical Society",
number = "1",

}

TY - JOUR

T1 - Catalysis of the combustion of synthetic char particles by various forms of calcium additives

AU - Levendis, Y. A.

AU - Nam, S. W.

AU - Nam, SukWoo

AU - Flagan, R. C.

AU - Gavalas, G. R.

PY - 1989/1/1

Y1 - 1989/1/1

N2 - The reactivity of calcium-laden carbonaceous particles to oxygen was investigated in the range 670-3000 K. The char particles were prepared from poly(furfural alcohol) (PFA) and were spherical and of uniform size. Three different methods were used to introduce the calcium additive: precipitation of calcium carbonate, impregnation with calcium acetate, and calcium ion exchange. Electron microscopy showed that the distribution of calcium was remarkably uniform in particles containing a bimodal distribution of micropores and transitional pores, whereas for particles with micropores only the Ca concentration was high at the surface and low at the center. X-ray analysis indicated that the conversion of the carbonate to the oxide at low temperatures (below 900 K) takes place only after all carbon has been consumed. Combustion studies showed that the calcium catalyzed the oxidation reaction at all temperatures investigated by up to 2 orders of magnitude. The effectiveness of the catalyst introduced by the different methods was comparable, with the calcium ion exchanged chars being, in general, the most reactive.

AB - The reactivity of calcium-laden carbonaceous particles to oxygen was investigated in the range 670-3000 K. The char particles were prepared from poly(furfural alcohol) (PFA) and were spherical and of uniform size. Three different methods were used to introduce the calcium additive: precipitation of calcium carbonate, impregnation with calcium acetate, and calcium ion exchange. Electron microscopy showed that the distribution of calcium was remarkably uniform in particles containing a bimodal distribution of micropores and transitional pores, whereas for particles with micropores only the Ca concentration was high at the surface and low at the center. X-ray analysis indicated that the conversion of the carbonate to the oxide at low temperatures (below 900 K) takes place only after all carbon has been consumed. Combustion studies showed that the calcium catalyzed the oxidation reaction at all temperatures investigated by up to 2 orders of magnitude. The effectiveness of the catalyst introduced by the different methods was comparable, with the calcium ion exchanged chars being, in general, the most reactive.

UR - http://www.scopus.com/inward/record.url?scp=0024303807&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0024303807&partnerID=8YFLogxK

M3 - Article

VL - 3

SP - 28

EP - 37

JO - Energy and Fuels

JF - Energy and Fuels

SN - 0887-0624

IS - 1

ER -