title: Effect of essential inorganic metals on primary thermal degradation of lignocellulosic biomass.
abstract: This study employed thermogravimetric analysis (TGA) and analytical Py-GC/MS in order to examine the catalytic effect of main inorganic metals (K, Mg and Ca) on the thermal degradation and the formation of pyrolytic products in lignocellulosic biomass. In addition, potential mechanisms of the primary pyrolysis in presence of the inorganic metals were derived. TG analysis showed that when potassium content increased in the biomass, char formation increased from 10.5 wt.% to 19.6 wt.% at 550 °C, and temperatures at which the maximum degradation rate was achieved shifted from 367 °C to 333 °C. With increasing magnesium content, the maximum degradation rate increased from 1.21 wt.%/°C to 1.43 wt.%/°C. Analytical Py-GC/MS revealed that potassium had a distinguished catalytic effect promoting the formation of low molecular weight compounds and suppressing the formation of levoglucosan. An increase in the yield of C6 and C2C6 lignin derivatives with increasing potassium content was also observed.
authors.affiliation: Department of Forest Sciences and Research Institute for Agriculture and Life Science, Seoul National University, 599 Gwanak-ro, Gwanak-gu, Seoul 151-921, Republic of Korea.
authors.forename: In-Yong
authors.initials: IY
authors.lastname: Eom
authors.forename: Jae-Young
authors.initials: JY
authors.lastname: Kim
authors.forename: Tae-Seung
authors.initials: TS
authors.lastname: Kim
authors.forename: Soo-Min
authors.initials: SM
authors.lastname: Lee
authors.forename: Donha
authors.initials: D
authors.lastname: Choi
authors.forename: In-Gyu
authors.initials: IG
authors.lastname: Choi
authors.forename: Joon-Weon
authors.initials: JW
authors.lastname: Choi
mesh_terms: D001673:Biodegradation, Environmental; D006361:Heating / Q000379:methods*; D008031:Lignin / Q000737:chemistry* / Q000528:radiation effects*; D008670:Metals / Q000737:chemistry* / Q000528:radiation effects*; D014934:Wood / Q000737:chemistry* / Q000528:radiation effects*
chemical_list: D008670:Metals; C036909:lignocellulose; D008031:Lignin