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