Since {HEAD ~ the physical sorption} of {TAIL ~ HCl} is generally thought to be a surface phenomenon and the presence of HCl on the surface of the sorbent would tend to catalyze the polymerization of hydrocarbon, it is surprising that the HCl sorbents of the present invention show such a low catalytic activity 
of
Since { HEAD ~ the physical sorption } of { TAIL ~ HCl } is generally thought to be a surface phenomenon and the presence of HCl on the surface of the sorbent would tend to catalyze the polymerization of hydrocarbon , it is surprising that the HCl sorbents of the present invention show such a low catalytic activity
OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH