Figure 1

(A) Protection of cellulose by lignin and hemicellulose, (B) mechanism of IL [TEA][HSO4] synthesis reaction, and (C) mechanism of the IL during pretreatment of OPEFB.

(A) Protection of cellulose by lignin and hemicellulose, (B) mechanism of IL [TEA][HSO4] synthesis reaction, and (C) mechanism of the IL during pretreatment of OPEFB.