Synthesis of Cellulose Nanocrystals (CNCs) from Brewer’s Spent Grain Using Acid Hydrolysis: Characterization and Optimization

Table 1

Independent variables and levels used in the CCD for acid hydrolysis of BSG cellulose.

Variables	Coding	Unit	Levels
			-1	0	1
Time	X1	Minute	35	40	45
Sulfuric acid concentration	X2	%	47	51	55
Temperature	X3	°C	45	50	55
Liquid solid ratio	X4	ml/g	15	20	25