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Reference al. et Ma (2014) al. et Rao (2011) al. et Fang (2004) al. et Shu (2010) al. et Pua (2011)
Yield (%) 98.00 68.00 96.00 95.00 64.50 54.32 46.60 48.80 14.20 71.00
site
Acid density (mmol/g) 2.64 3.96 3.62 3.01 3.2 2.6 2.5 2.8 0.6 2.426
Strength (mmol SO 3 H/g) 0.7 0.84 0.75 1.04 0.935 1 1.09 0.7 0.735
Surface area (m 2 /g) 96 483 468 2.61 1.88 1.37 0.79 2.4 556
oil ferrea oil
Feedstock acid Oleic acid Oleic acid Oleic acid Oleic Canola Calophyllum inophyllum oil Mesua and L. Jatropha curcas
S time (h) 4 1 1 1 5 5 15 15 5 1
S temp ( C) 333 3 5 3 5 3 5 150 150 150 150 150 3 5
agent. C time (h) 1 1 1 1 5 1
sulfonating C temp ( C) 573 500 500 500 527 527 527 527 400 500
different agent sulfuric sulfuric sulfuric sulfuric sulfuric acid C temp , carbonization temperature; C time , carbonization time; S temp , sulfonation temperature; S time , sulfonation time.
by Sulfonating Fuming acid Fuming acid Fuming acid Fuming acid Fuming acid p-Toluene sulfonic
preparation 4-BDS 4-BDS 4-BDS 4-BDS
Catalyst straw Jatropha seed curcas Paullinia seed pinnata Mesua L. ferrea seed char Hardwood char Hardwood char Hardwood char Hardwood Calophyllum inophyllum seed waste cake
4.2 Biomass Corn Deoiled Deoiled Deoiled Deoiled Oil
Table S. No. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.