From the several single-factor experiments conducted, it can be summarized that the optimum operational conditions for cellulose hydrolysis were determined as 1.0 g of cellulose material and 0.8 M of Cr(NO3)3 catalyst with a solid-liquid ratio of 1:30 at the temperature of 80 °C for 1.5 h. In addition, the yield of solid product cellulose nanomaterial (CNCCr(NO3)3) was approximately 83.6% ± 0.6%. Meanwhile, the CNCH2SO4 obtained via sulfuric acid hydrolysis was determined to produce about 54.7% ± 0.3%. The yield of CNCH2SO4 was much lower than that of CNCCr(NO3)3 as an acid hydrolysis process is well-known to be a harsh treatment that results in disintegration and degradation, leading to fewer crystalline domains, causing the dramatic decrease in product yield. Both manufactured CNC products were further characterized.