Cellulose dehydration and depolymerization reactions during pyrolysis in the presence of phosphoric acid

Autor:	O. Faix, Dietrich Meier, G. Telysheva, Galina Dobele, G. Rossinskaja
Rok vydání:	1999
Předmět:	Depolymerization Levoglucosan medicine.disease Analytical Chemistry chemistry.chemical_compound Fuel Technology chemistry Yield (chemistry) medicine Organic chemistry Pyrolytic carbon Dehydration Cellulose Pyrolysis Phosphoric acid
Zdroj:	Journal of Analytical and Applied Pyrolysis. 49:307-317
ISSN:	0165-2370
DOI:	10.1016/s0165-2370(98)00126-0
Popis:	The low-temperature pyrolysis process and dehydration reactions of cellulose impregnated with phosphoric acid (1–10 wt.%) have been studied. Based on the yield of pyrolytic water and alterations of glucopyranose units of cellulose, it has been confirmed that dehydrated cyclic structures are formed in the solid phase during cellulose pyrolysis in the temperature interval 200–250°C. Phosphoric acid also catalyzes the subsequent depolymerization process of the dehydrated cellulose giving rise to 20% (on cellulose) of levoglucosenone. The yield of levoglucosenone depends on the amount of phosphoric acid and the time of pyrolysis. Thus, the pathway of dehydration reactions can be controlled by variation of these two parameters.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::72b497da5806c4ec345c765a5264fac9 https://doi.org/10.1016/s0165-2370(98)00126-0 Zobrazit plný text záznamu Full Text from ScienceDirect