Jm. Nagpal et al., STABILITY OF CRACKED NAPHTHAS FROM THERMAL AND CATALYTIC PROCESSES AND THEIR ADDITIVE RESPONSE .1. EVALUATION OF STABILITY AND ADDITIVE RESPONSE, Fuel, 74(5), 1995, pp. 714-719
Olefinic naphthas derived from fluid catalytic cracking (FCC) or therm
al cracking units are increasingly being used in high-octane motor gas
oline with growing concern for resulting fuel quality. Hindered phenol
s and substituted arylamines are the two classes of antioxidants gener
ally used for improving the stability of gasoline. The olefin types in
cracked naphthas depend strongly on the process from which they are d
erived and hence are expected to show different responses with differe
nt antioxidants. However, systematic information on this aspect of ant
ioxidant action is non-existent in the literature. Using two represent
ative commercial antioxidants from each class with representative naph
thas (FCC, visbreaking and coker), it was found that phenolic antioxid
ants gave a better response with thermally cracked naphthas. With amin
e-type antioxidants no clear preference could be observed.