The low pressure pyrolysis of newsprint

Agrawal, Ravindra K.; McCluskey, Richard J.

doi:10.1002/app.1983.070280132

Cited by 26 publications

(21 citation statements)

References 15 publications

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“…The isothermal pyrolysis of cellulose has been widely reported to be a two-step reaction with an initial reaction rate that differs from the longer-time reaction rate (Agrawal, 1984;Bradbury et al;1979, Broido, 1976Chatterjee and Conrad, 1966;Lipska and Parker, 1966). Such a dual reaction pathway has been seen in isothermal pyrolysis studies of other cellulosic materials (Agrawal and McCluskey, 1983;Agrawal, 1984). The order of initial reaction is sometimes taken as zero (Chatterjee, 1968;Lipska and Parker, 1966) and sometimes as one (Bradbury et al, 1979).…”

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confidence: 78%

Kinetics of reactions involved in pyrolysis of cellulose I. The three reaction model

Agrawal

1988

Can J Chem Eng

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116

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Kinetics of reactions involved in pyrolysis of cellulose has been modeled in terms of a three reaction model. In this model it is assumed that cellulose decomposes to tars, chars and gaseous products via three competitive first‐order reactions. Arrhenius parameters have been obtained to describe the rate constants of these reactions. The three reaction model predicts the weight loss data reasonably well. Product yields of tars, chars and gases predicted by the three reaction model are compared over the temperature range 250 to 360°C. In this communication a technique for analyzing experimental data of a solid state reaction is presented.

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confidence: 78%

Kinetics of reactions involved in pyrolysis of cellulose I. The three reaction model

Agrawal

1988

Can J Chem Eng

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116

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“…At present all that is known is that the polymer product of Pathway 6 undergoes pyrolysis by at least two competing pathways, one of which produces more solid residue (char) than the second. 181 10 5 more rapid than those measured by Hajaligol et al 141 or projected by Antal et al 142 How can these disparate results be reconciled?…”

Section: Moderate Temperature Phenomenamentioning

confidence: 91%

Biomass Pyrolysis: A Review of the Literature Part 2—Lignocellulose Pyrolysis

Antal¹

1985

Advances in Solar Energy

120

100

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A normative review of the literature describing the products, mechanisms, and rates of lignin and whole biomass pyrolysis is presented. The role of a complex sequence of competing solid-and vapor-phase pyrolysis pathways is elucidated. 175 K. W. Böer et al. (eds.), Advances in Solar Energy © Plenum Press, New York 19854.3.2.1 Products. At low pressure, anhydrosugars distill when heated to temperatures above 200°C and can be quantitatively recovered. 94 -99 However,levoglucosenone is known to polymerize in the liquid phase even at low temperatures,lOO and many anhydrosugars undergo vapor phase dehydration reactions in the presence of acid catalysts. 95 . 97 ,lOl,l02 In addition to distillation,103,l04 monosaccharides also polymerize to high molecular weight glucans which undergo subsequent fragmentation reactions, resulting in the formation of a wide variety of furans, ketones, aldehydes, and acids. l05 ,l06 Heyns and his coworkers l05 ,l06 observed the same degradation products from sixteen mono-, di-, oligo-, and polysaccharides. This caused * In Part 1 of this Review, concern was expressed over the apparent use of a (mis)identity A2 -B2=? (A -B)2 by Lewin and Basch 61 . Lewin and Basch have independently checked their work and report that their analysis did not involve the use of the (mis)identity given above. 180 CHzOH ;:::= ,t°'-O

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“…The corresponding activation energies, preexponential factors, and reaction orders were determined in the experimental conditions. In other studies, some investigators have used thermogravimetry to examine the degradation kinetics of newsprint in air and nitrogen [19] and to explore the effects of acid washing on the pyrolysis products [20]. The results of previous studies provided some knowledge of determining the pyrolysis kinetics and products of cellulosic materials but they have not provided the related data about the pyrolysis products distribution of uncoated printing and writing paper of MSW.…”

Section: Introductionmentioning

confidence: 99%