Since {TAIL ~ the physical sorption} of HCl is generally thought to be a surface phenomenon and the presence of HCl on {HEAD ~ 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 
Since { TAIL ~ the physical sorption } of HCl is generally thought to be a surface phenomenon and the presence of HCl on { HEAD ~ 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 TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD 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