Slow-rate devolatilization of municipal sewage sludge and texture of residual solids

다국어 초록 (Multilingual Abstract)

Ash-rich sludge samples originating in four large plants were analyzed and employed to explore primarily the kinetics and the chemistry of devolatilization. A gravimetric, slowly increasing-temperature method was used in the range 298-1,123 K in a milieu of nitrogen. As an intricate combination of numerous (bio)organic and inorganic compounds, the dry sludge commences devolatilizing at approximately 418 K. The bulk of organic matter is released up to 823 K, at the rate becoming very slow thereafter. Basic constituents of the product gas are CO2, CO, H2, and CH4 with undesired nitrogenous, sulfurous, and chloro compounds. The residual solids contain significant amounts of organic matter/carbon and, on account of their favorable textural characteristics, they can be viewed as promising sorbents or catalysts. Kinetic triad was inferred from the experimental data: the model is well-capable of simulating the process of devolatilization and can be used for design considerations. An explicit equation, based upon a tractable approximation to the temperature integral (for [E/(RT)]0.1), has been verified and proposed for predicting the maximum reaction rate temperature. Remarkable differences in thermal behavior were explored in detail between the sludge and the alkali bicarbonates.

참고문헌 (Reference)

1 J. Werther, 25 : 55-, 1999

2 M. Hartman, 111 : 149-, 1992

3 M. Hartman, 52 : 10619-, 2013

4 M. Hartman, 58 : 2868-, 2019

5 G. I. Senum, 11 : 445-, 1977

6 J. Cai, 52 : 1554-, 2006

7 J. Johnston, 32 : 938-, 1910

8 M. Hartman, 44 : 3432-, 2005

9 M. Hartman, 178 : 166-, 2007

10 A. Magdziarz, 34 : 174-, 2014

11 S. S. A. Syed-Hassan, 80 : 888-, 2017

12 K. Svoboda, 90 : 629-, 2009

13 I. Petersen, 44 : 717-, 2005

14 G. Liu, 4 : 1819-, 2016

15 J. Ábrego, 27 : 1026-, 2013

16 I. Fonts, 16 : 2781-, 2012

17 S. A. Scott, 62 : 584-, 2007

18 M. R. Stammbach, 3 : 255-, 1989

19 R. C. Kistler, 21 : 704-, 1987

20 J. Piskorz, 25 : 265-, 1986

21 T. J. Bandosz, 67 : 77-, 2006

22 D. L. Pyle, 39 : 147-, 1984

23 J. Poudel, 40 : 112-, 2015

24 M. Atienza-Martínez, 29 : 160-, 2015

25 M. Atienza-Martínez, 222 : 534-, 2013

26 A. Dhungana, 90 : 186-, 2012

27 M. Hartman, 54 : 1761-, 2008

28 S. A. Scott, 61 : 2339-, 2006

29 D. L. Urban, 61 : 799-, 1982

30 J. A. Conesa, 15 : 293-, 1997

31 R. Dümpelmann, 69 : 953-, 1991

32 E. Biagini, 81 : 1041-, 2002

33 S. A. Scott, 85 : 1248-, 2006

34 A. W. Coats, 201 : 68-, 1964

35 C. D. Doyle, 207 : 290-, 1965

36 T. V. Lee, 30 : 517-, 1984

37 Mohd Roslee Othman, "Thermogravimetric characteristics and pyrolysis kinetics of Giheung Respia sewage sludge" 한국화학공학회 27 (27): 163-167, 2010

38 I. Barin, "Thermochemical data of pure substances" VCH 1995

39 P. Vallet, "Tables numériques permettant l´integration des constantes de vitess par rapport a la température" Gauthier-Villars 1961

40 D. Zenz, "Municipal sewage sludge management: A reference text on processing, utilization and disposal Vol. 4" Technomic 1998

41 H. Remy, "Lehrbuch der anorganischen chemie, Band I" Geest & Portig 1965

42 O. Schlömilch, "Compendium der höheren analysis" Vieweg & Sohn 1874