Pyrolysis of cellulose, an introduction to the literature

Abstract

Topics related to cellulose pyrolysis are briefly surveyed under several headings. The principal aim is to give the reader some grasp of the issues involved and provide a guide to the relevant literature. The headings include: changes in cellulose fine structure with heating, chemical changes during pyrolytic weight loss, and kinetic modeling of pyrolysis. Principal emphasis is on the last area; it is concluded that no current kinetic model adequately predicts both the observed changes in degree of polymerization and the weight loss during heating. 1.

Cellulose Pyrolysis Kinetics: The Current State of Knowledge

“…Ten years have passed since the last comprehensive review of biomass pyrolysis (Antal, 1982b(Antal, , 1985a was published. During this time, numerous topical surveys (Hirata, 1985; Radlein et al, 1991;Elliott et al, 1991;Bridgwater and Cottam, 1992) have appeared, but no critical reviews of cellulose pyrolysis kinetics have been published. This void weakens the foundations of the field, since recent work has employed sophisticated instrumentation and numerical simulations which could not have been imagined earlier.…”

Stage experiment at MAE: reports and case studies.

“…Questiona va a visão transmitida ao aluno, a qual negava qualquer autonomia ao artefato enquanto documen to, supervalorizando o objeto "entendido apenas como obra de arte, a testemunhar, por exemplo, uma pretensa superioridade artística da Antigüidade Clássica". (Hirata 1985).…”

“…O bjetivava entre outros, explorar a docu m entação arqueológica do acervo do MAE como ponto de partida para a discussão de conceitos básicos das ciências humanas. Visava "am pliar a dimensão do docum ento material como fonte histórica ou antropológica; ressaltar a sua im portância prim ordial para o estudo de certos traços culturais, suplantando o texto como veículo de mensagens no mundo antigo e atual; estabelecer os níveis de autonomia docum ental que pode assum ir o artefato arqueológico" (Hirata 1985).…”