Study on Reutilization of Pyrolytic Residues of Oily Sludge

Table 4

Elemental analysis of pyrolytic residues at different stages.

Sample	Element type and mass fraction (%)
	C	O	Na	Al	Si	S	Ca	Fe
Pyrolytic residues	38.77	21.12	1.16	21.31	12.14	0.94	1.88	2.67
Acid-soluble product	58.48	18.81	—	1.36	20.67	0.68	—	—
Pyrolytic carbon	90.75	6.42	—	1.87	0.66	0.30	—	—
Activated carbon	91.03	7.18	—	0.85	0.33	0.61	—	—