PREPARATION OF CRYSTALLIZED CARBON USABLE FOR ELECTROMAGNETIC SHIELDING BY NICKEL-CATALYZED CARBONIZATION OF BIOMASS PYROLYSIS TAR

摘要

Biomass pyrolysis tars from larch (LW), alder (AW), bamboo (BA), and rice husks (RH) were carbonized atrn900℃ for 1 h in a flow of nitrogen after they were loaded with nickel alone or co-loaded with nickel and sodium.rnBy a single addition of 4 wt% nickel, LW, AW, and BA tars produced chars in which turbostratic structure ofrncarbon (T-component) was so effectively formed as to have a practical electromagnetic shielding (EMS)rncapacity. For RH tar, co-loading with 4 wt% nickel and 4 wt% sodium enabled the resulting char to possess anrnadequate EMS capacity, because sodium acted as the promoter to produce T-component sufficiently. Thesernresults will show a promising conversion of biomass tars into such a functional carbon material.