Comprehending adsorption of methylethylketone and toluene and microwave regeneration effectiveness for beaded activated carbon derived from recycled waste bamboo tar

Figures & data

Figure 1. Schematic diagram of the adsorption testing system.

Figure 2. Scanning electron micrograph under 100× (upper) and 1500× (lower) magnification for (a) SBAC-T800-t3, (b) SBAC-T850-t3, (c) SBAC-T900-t2, (d) SBAC-T900-t3, (e) SBAC-T900-t4, and (f) KBAC.

Table 1. Physical and chemical properties of the adsorbents examined in this study.

	Component (wt% on dry basis)
Sample	C	H	O	N	S	Ash	Smicro (m^2 g^−1)	Stotal (m^2 g^−1)	Vmicro (cm^3 g^−1)	Vtotal (cm^3 g^−1)	davg (nm)
KBAC	88.60	1.58	4.23	0.46	0.03	5.10	956	973	0.494	0.526	2.162
SBAC-T800-t3	85.71	1.49	6.35	0.92	0.05	5.48	666	684	0.343	0.376	2.193
SBAC-T850-t3	85.36	1.49	7.47	0.87	0.05	4.76	903	927	0.465	0.512	2.195
SBAC-T900-t2	89.47	1.02	4.08	1.08	0.07	4.28	966	998	0.497	0.544	2.178
SBAC-T900-t3	88.90	1.05	4.51	0.99	0.07	4.48	1222	1266	0.631	0.692	2.186
SBAC-T900-t4	85.55	1.30	6.30	0.99	0.07	5.79	1306	1364	0.674	0.751	2.201

Figure 3. (a) Nitrogen adsorption isotherm; (b) micropore; and (c) mesopore size distribution for the adsorbents examined in this study.

Figure 4. Experimental and Langmuir-modeled isotherms; MEK adsorption on (a) SBAC-T900-t3, (b) SBAC-T900-t4, and (c) KBAC; toluene adsorption on (d) SBAC-T900-t3, (e) SBAC-T900-t4, and (f) KBAC.

Figure 5. Experimental and Freundlich-modeled isotherms; MEK adsorption on (a) SBAC-T900-t3, (b) SBAC-T900-t4, and (c) KBAC; toluene adsorption on (d) SBAC-T900-t3, (e) SBAC-T900-t4, and (f) KBAC.

Figure 6. Experimental and Dubinin-Radushkevich-modeled isotherms; MEK adsorption on (a) SBAC-T900-t3, (b) SBAC-T900-t4, and (c) KBAC; toluene adsorption on (d) SBAC-T900-t3, (e) SBAC-T900-t4, and (f) KBAC.

Figure 7. Variation of isosteric heat of adsorption with surface loading; MEK adsorption on (a) SBAC-T900-t3, (b) SBAC-T900-t4, and (c) KBAC; toluene adsorption on (d) SBAC-T900-t3, (e) SBAC-T900-t4, and (f) KBAC.

Figure 8. Temperature variations and desorption efficiencies for microwave regeneration of BACs saturated with MEK (n = 3).