Comparati563ve study of pyrolysis characteristics of bamboo powder and grape vine by anaerobic fermentation pretreatment

Publication date: Available online 13 February 2019Source: Journal of Analytical and Applied PyrolysisAuthor(s): Tipeng Wang, Yinong Ai, Hang Li, Qiang LuAbstractTo explore the different effects of anaerobic fermentation on pyrolysis behaviors of grass and xylophyta, bamboo powder (BP) and grape vine (GV) were pretreated and pyrolysis characteristics were studied by TGA and Py-GC/MS. With increasing pretreatment time from 0 to 20 days, cellulose contents in BP decreased from 51.47 to 48.52 wt. % and extractives contents increased from 5.58 to 11.57 wt. %. Only the extractives of GV were degraded from17.92 to 12.05 wt. %. TG curves of BP moved to higher temperature and the residues at 700oC decreased from 25.11 to 16.9 wt. %. TG curves of GV moved to lower temperature and the residues at 700oC increased. BP bio-oil yield increased only at 500 oC and that of the GV changed slightly. In the bio-oil of BP pyrolyzed at 500 oC, sugars contents firstly increased from 3.09 to 18.18 % and then decreased to 16.22%; contents of linear acids and linear ketones decreased. The pretreatment improved significantly pyrolysis selectivity of BP for levoglucose (LG) and 4-vinyl phenol (4-VP). At 500 oC, LG content reached the maximum13.71% from the sample for 5days. At 300 oC, 4-VP content reached the maximum16.16% from the sample for 20days. Prolonging pretreatment time would restrain the formation of LG, 4-VP and acetic acid. The bio-pretreatment increased the contents of linear carbonyls, lin...

Source: Journal of Analytical and Applied Pyrolysis - February 14, 2019 Category: Chemistry Source Type: research