No Name of sample Source of sample
1 Coal tar pitch Coking plants in Shanxi Province
3 Coaltar oil Coking plants in Shanxi Province
5 Petroleum Asphalt South Korea
6 Residue after heavy oil cracking Oil refinery plant in XinjiangProvince
7 Ethylene product residue Petroleum refinery plant in XinjiangProvince
Table 1: The Names and Sources of Typical Sample.