Fractionation and gasification of black liquor derived from kraft pulping

By combining hydrolysis, it was observed that the maximum concentration of xylose + mannose + galactose (xmg) was 10.7 g/L at a CS of 1.72. The aliphatic acid, aromatic acid and aldehydes were released 29.8, 0.45 and 0.90 g/L from the black liquor at CS of 1.19, 1.72, and 2.19, respectively. In the gasification using bench-scale bubbling fluidized bed (BFB) reactor, high-quality syngas (H2/CO: 1.47) was obtained from the steam of acid-insoluble lignin (AIL), suitable for conventional energy systems such as gas engines, turbines, and boilers.

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