Pyrolysis of Coffee Husks and Parchment
V. M. Zaichenkoa,*, M. I. Knyazevab,**, A. Yu. Krylovaa,***,
A. B. Kulikovb,****, and Yu. M. Faleevaa,*****
a Joint Institute of High Temperatures, Russian Academy of Sciences,
Moscow, 125412 Russia
b Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences,
Moscow, 119991 Russia
Correspondence to: *e-mail: zaitch@oivtran.ru
Correspondence to: **e-mail: knyazeva@ips.ac.ru
Correspondence to: ***e-mail: aykrylova@yandex.ru
Correspondence to: ****e-mail: akulikov@ips.ac.ru
Correspondence to: *****e-mail: faleeva.julia@mail.ru
Received 10 March, 2020
Abstract—The pyrolysis of coffee husks and coffee parchment at 350 and 500°C was considered as the first stage of gasification by the two-stage thermal conversion of biomass into synthesis gas. The yields and compositions of pyrolysis products at the selected temperatures were determined. It was found that a significant amount of acetic acid was formed in the aqueous phase of the pyrogenic liquid to significantly complicate the use of an aqueous layer for the subsequent gasification. The possibility of practical implementation of the pyrolysis of waste coffee products as an independent process or the first stage of conversion into synthesis gas was noted.
Keywords: coffee husks, coffee parchment, pyrolysis, composition of solid, liquid, and gaseous products
DOI: 10.3103/S0361521921010110