Thermophysical Characteristics of Novel Biomass-Derived Activated Carbon as a Function of Synthesis Parameters
Md. Amirul Islam, Animesh Pal, Bidyut Baran Saha, Seong‐Ho Yoon, Jin Miyawaki
Abstract
Activated carbon signifies extensive carbonized materials of a high degree of porosity and has a wide range of applications. The porous and thermal properties of activated carbon (AC) are primarily dependent on the chosen raw material and synthesis conditions. In this article, the thermophysical properties of twelve waste biomass-derived AC samples are investigated and correlated. These AC samples are synthesized from mangrove and waste palm trunk. The samples are different in terms of carbonization temperature (500 and 600°C), activation temperature (600 to 900°C), and the mixing ratio (4 or 6) of the activation chemical, which is potassium hydroxide. The specific heat capacity of W-AC-C600-A900-K6 is found to have the lowest (0.843 to 1.14 kJ kg−1 K−1), and M-AC-C500-A900-K4 shows the highest (1.18 to 1.86 kJ kg−1 K−1) among the studied samples. Experimental data are fitted with the Green-Perry model with an error of less than 2%. This study also accounts for the comparison of specific heat capacity of studied samples and other adsorbents such as AC obtained from different precursors, silica gels, carbon-based consolidated composites, and metal-organic frameworks found in the literature. Moreover, this study gives the insight to synthesize high-quality AC from unknown biomass sources for a particular application.