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