The catalyst 1, wherein {HEAD ~ CR2 O3} and Al2 O3 are directly deposited on the Zn ZSM 5 zeolite or {TAIL ~ the Zn ZSM 5 zeolite/asbestos} 
directly deposited on
The catalyst 1 , wherein { HEAD ~ CR2 O3 } and Al2 O3 are directly deposited on the Zn ZSM 5 zeolite or { TAIL ~ the Zn ZSM 5 zeolite / asbestos }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL