Role of active sites in the steam activation of high unburned carbon fly ashes

Fuel

Volumn 87, Issue 12, 2008, Pages 2598-2605

  Lu, Zhe ^a   Maroto Valer, M Mercedes ^b   Schobert, Harold H ^a  

^a PENNSYLVANIA STATE UNIVERSITY   (United States)

^b UNIVERSITY OF NOTTINGHAM   (United Kingdom)

Author keywords

Activation; Active sites; Fly ash carbon; Unburned carbon

Indexed keywords

ACTIVATED CARBON; CHEMICAL ACTIVATION; GASIFICATION; STATISTICAL METHODS; THERMOGRAVIMETRIC ANALYSIS; X RAY PHOTOELECTRON SPECTROSCOPY;

ACTIVE SITES; FLY ASH CARBON; NON-DISPERSIVE INFRARED ANALYSIS (NDIR); UNBURNED CARBON;

FLY ASH;

EID: 43849091646     PISSN: 00162361     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.fuel.2008.01.016     Document Type: Article

References (48)

1. Hower J.C., Rathbone R.F., Robl T.L., Thomas G.A., Haeberlin B.O., and Trimble A.S. Case study of the conversion of tangential- and wall-fired units to low-NOx combustion: impacts on fly ash quality. Waste Manage (Tucson, AZ) 4 (1997) 219-229
2. Hurt R.H., and Gibbins J.R. Residual carbon from pulverized coal fire boilers: 1. Size distribution and combustion reactivity. Fuel 74 4 (1995) 471-480
3. Hill R.L., Sarkar S.L., Rathbone R.F., and Hower J.C. An examination of fly ash carbon and its interactions with air entraining agent. Cement Concrete Res 27 (1997) 193-204
4. Freeman E., Gao Y., Hurt R.H., and Suuberg E.M. Interactions of carbon-containing fly ash with commercial air-entraining admixtures for concrete. Fuel 76 8 (1997) 761-765
5. Gao Y., Shim H., Hurt R.H., Suuberg E.M., and Yang N.Y.C. Effect of carbon on air-entrainment in fly ash concrete: the role of soot and carbon black. Energ Fuel 11 2 (1997) 457-462
6. Zhang Y., Lu Z., Maroto-Valer M.M., Andrésen J.M., and Schobert H.H. Comparison of high-unburned-carbon fly ash from different combustor types and their steam activated products. Energ Fuel 17 (2003) 369-377
7. Bansal R.C., Donnet J., and Stoeckli F. Active carbon (1988), Marcel Dekker Inc., New York, Basel
8. Chi W.K., and Perlmutter D.D. The effect of pore structure on the char-steam reaction. AIChE J 35 11 (1989) 1791-1802
9. Laine N.R., Vastila F.J., and Walker Jr. P.L. The importance of active surface area in the carbon-oxygen reaction. J Chim Phys 67 (1963) 2030-2034
10. Radovic L.R. Importance of catalytic and carbon active sites in lignite char gasification. Doctor of philosophy (1982), The Pennsylvania State University, University Park
11. Rodríguez-Reinoso F. Controlled gasification of carbon and pore structure development. In: Lahaye J., and Ehrburger P. (Eds). Fundamental issues on control of carbon gasification reactivity (1991), Kluwer Academic Publishers, Dordrecht, Boston, London 533-572
12. Martín-Alonso A., and Tason J.M.D. The determining role of mineral matter on gasification reactivity of brown coal chars. In: Lahaye J., and Ehrburger P. (Eds). Fundamental issues on control of carbon gasification reactivity (1991), Kluwer Academic Publishers, Dordrecht, Boston, London 435-460
13. Tayler H.S. Fourth report of committee on contact catalysis. J Phys Chem 30 2 (1926) 145-171
14. Essenhigh R.H. Chemistry of coal utilization 2nd supplementary volume (1981), Wiley Publisher, New York
15. McEnaney B. Active sites in relation to gasification of coal chars. In: Lahaye J., and Ehrburger P. (Eds). Fundamental issues on control of carbon gasification reactivity (1991), Kluwer Academic Publishers, Dordrecht, Boston, London 175-204
16. Radovic L.R., Lizzio A.A., and Jiang H. Reactive surface area: an old but new concept in carbon. In: Lahaye J., and Ehrburger P. (Eds). Fundamental issues on control of carbon gasification reactivity (1991), Kluwer Academic Publishers, Dordrecht, Boston, London 235-256
17. Laurendeau N.M. Heterogeneous kinetics of coal char gasification and combustion. Progress in energy and combustion science vol. 4 (1978), Pergamon Press Ltd., Great Britain p. 221-70
18. McNamee B. Active sites in relation to gasification of coal chars. In: Lahore J., and Ehrburger P. (Eds). Fundamental issues on control of carbon gasification reactivity (1991), Kluwer Academic Publishers, Dordrecht, Boston, London 175-204
19. Calo J.M., and Perkins M.T. A heterogeneous surface model for the "steady-state" kinetics of the boudoudard reaction. Carbon 25 3 (1987) 395-407
20. Sloss L.L., Smith I.M., and Adams D.M.B. Pulverized coal ash-requirements for utilization (1996), IEA Coal Research, London, UK
21. Maroto-Valer M.M., Taulbee D.N., and Schobert H.H. Prepr Pap Am Chem Soc Div Fuel Chem 44 1 (1999) 101-105
22. Maroto-Valer MM, Andrésen JM, Zhang Y. In: Lankey RL, Anastas PT, editors. Advancing sustainability through green chemistry and engineering, American chemical society symposium series, vol. 823. 2002. p. 225-41 [chapter 15]
23. Lu Z, Zhang Y, Maroto-Valer MM, Andrésen JM, Schobert, HH. Utilization of coal combustion waste for the production of activated carbons, 11th International conference on coal science, CD-ROM Publication; 2001 [Paper ICCS-PAPER375].
24. 2 capture. In: Proceedings of international ash utilization symposium, CD-ROM Publication; 2003 [Paper 91]
25. Warren B.E. X-ray diffraction in random layer lattices. Phys Rev 59 9 (1941) 693-698
26. Radovic L.R., Walker Jr. P.L., and Jenkins R.G. Importance of catalyst dispersion in the gasification of lignite chars. J Catal 82 2 (1982) 382-394
27. Radovic L.R., Walker Jr. P.L., and Jenkins R.G. Importance of carbon active sites in the gasification of coal chars. Fuel 62 July (1983) 849-856
28. Külaots I., Aarna I., Callejo M., Hurt R.H., and Suuberg E.M. Development of porosity during coal char combustion. Proc Combust Inst 29 1 (2002) 495-501
29. Külaots I., Gao Y., Hurt R.H., and Suuberg E.M. The role of polar surface and mesoporosity in adsorption of organics by fly ash carbons. Prepr Am Chem Soc Div Fuel Chem 43 3-4 (1998) 980-984
30. Lizzio A.A., Jiang H., and Radovic L.R. On the kinetics of carbon (char) gasification: reconciling models with experiments. Carbon 28 1 (1990) 7-19
31. Gergova K., Eser S., and Schobert H.H. Preparation and characterization of activated carbons from anthracite. Energ Fuel 7 5 (1993) 661-668
32. Sun J., Hippo E.J., Marsh H., O'Brien W.S., and Crelling J.C. Activated carbon produced from an Illinois basin coal. Carbon 35 3 (1997) 341-352
33. Maroto-Valer M.M., Taulbee D.N., and Hower J.C. Novel separation of the differing forms of unburned carbon present in fly ash using density gradient centrifugation. Energ Fuel 13 (1999) 947-953
34. Maroto-Valer M.M., Taulbee D.N., and Hower J.C. Characterization of differing forms of unburned carbon present in fly ash separated by density gradient centrifugation. Fuel 80 6 (2001) 795-800
35. Maroto-Valer M.M., and Schobert H.H. Selective activation of anthracites for the production of activated carbons with molecular-sieve properties. Prepr Am Chem Soc Div Fuel Chem (2000) 219-221
36. Takagi H., Maruyama K., Yoshizawa N., Yamada Y., and Sato Y. XRD analysis of carbon stacking structure in coal during heat treatment. Fuel 83 17-18 (2004) 2427-2433
37. Walker Jr. P.L., Palmer H.B., and Diethorm W.S. Summary report and new proposal for research on graphite (1963), The Pennsylvania State University, University Park
38. Walker Jr. P.L., and Imperial G. Graphitic character of kish. Nature (London) 180 (1957) 1184-1185
39. Külaots I, Suuberg, EM, Aarna I, Chan E, Hsu A. Pore development in a softening coal char during activation in various oxidizing gases. In: Proceedings of international carbon 2004 conference, [J041.pdf].
40. Cartz L., and Hirsch P.B. A contribution to the structure of coals from X-ray diffraction studies. Philos Trans Roy Soc S-A: Phys Sci Eng 252 1019 (1960) 557-602
41. Lewis I.C. Chemistry of carbonization. Carbon 20 6 (1982) 519-529
42. Franklin R.E. The structure of graphitic carbons. Acta Cryst 4 (1951) 253-261
43. Babu V.S., and Seehra M.S. Modeling of disorder and X-ray diffraction in coal-based graphitic carbons. Carbon 34 10 (1996) 1259-1265
44. Long F.J., and Sykes K.W. The mechanism of the steam-carbon reaction. Proc Roy Soc S-A: Math Phys Sci 193 1034 (1948) 37-399
45. Blake J.H., Bopp G.R., Jones J.F., Miller M.G., and Tambo W. Fuel 46 2 (1967) 125-131
46. Gadsby J., Hinshelwood C.N., and Sykes K.W. The Kinetics of the reactions of the steam-carbon system. Proc Roy Soc S-A Math Phys Sci 187 1009 (1946) 129-151
47. Walker Jr. P.L., Rusinko Jr. F., and Austin L.G. Gas reaction of carbon. Adv Catal 11 (1959) 134-221
48. Lizzio A.A., and Radovic L.R. Transient kinetics study of catalytic char gasification in carbon dioxide. Ind Eng Chem Res 30 8 (1991) 1735-1744