Table 1.

Element and SACs of the fresh, used and regenerated catalysts

Catalysts	C (wt. %)	H (wt. %)	O (wt. %)	S (wt. %)	SAC (mmol/g)
01	59.49	4.66	21.74	13.10	2.63
07	60.57	4.61	25.09	9.73	0.85
08	52.46	4.69	31.44	11.41	2.17
14	61.66	4.85	23.81	9.67	0.29
15	58.26	4.72	25.54	11.46	1.97
21	61.03	4.59	24.37	10.01	0.38
22	55.39	4.68	27.57	12.36	2.87
28	62.37	5.42	21.82	10.38	0.56