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Table 1 Brunauer, Emmett, and Teller (BET) method analysis on surface area and pore volume

From: Direct production of biodiesel from high-acid value Jatrophaoil with solid acid catalyst derived from lignin

Sample SBET (m2/g) V (cm3/g)
Kraft lignin char (only pyrolysis) 127.6 0.062
Pretreated Kraft lignin char (phosphoric acid pretreatment + pyrolysis) 654.4 0.544
Sulfonated Kraft lignin char (catalyst) 54.8 0.058