The porous structure examination of the samples can be clearly seen from the SEM photographs, depicted in Fig. 3. It can be clearly seen that the surface texture of char is dense, compact, uneven, undulating and covered by deposited tarry substances (Fig. 3a). However, MPAC displays a well-pronounced porosity, with homo- geneous pores distributed around the surface (Fig. 3b). Comparison of the surface morphology verifies substantial changes occurred due to microwave irradiation.
Nitrogen adsorption–desorption curve provides qualitative information on the adsorption mechanism and porous structure of the carbonaceous materials (Fig. 4). The isotherm resembles a combination of type I and type II isotherms, in accordance with the IUPAC classification [11]. This adsorption behavior exhibits a combination of microporous–mesoporous structure. The surface physical parameters obtained from the N2 adsorption isotherms were summarized in Table 1. From the data, it is evident that the BET surface area, Langmuir surface area and total pore volume of
The porous structure examination of the samples can be clearly seen from the SEM photographs, depicted in Fig. 3. It can be clearly seen that the surface texture of char is dense, compact, uneven, undulating and covered by deposited tarry substances (Fig. 3a). However, MPAC displays a well-pronounced porosity, with homo- geneous pores distributed around the surface (Fig. 3b). Comparison of the surface morphology verifies substantial changes occurred due to microwave irradiation.
Nitrogen adsorption–desorption curve provides qualitative information on the adsorption mechanism and porous structure of the carbonaceous materials (Fig. 4). The isotherm resembles a combination of type I and type II isotherms, in accordance with the IUPAC classification [11]. This adsorption behavior exhibits a combination of microporous–mesoporous structure. The surface physical parameters obtained from the N2 adsorption isotherms were summarized in Table 1. From the data, it is evident that the BET surface area, Langmuir surface area and total pore volume of
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