What kind of a catalyst is used in the packed bed reactor of isomerization section in the manufacture of isoprene from isomerization of polypropylene dimer?

What kind of a catalyst is used in the packed bed reactor of isomeriza

1.	What kind of a catalyst is used in the packed bed reactor of isomerization section in the manufacture of isoprene from isomerization of polypropylene dimer?
A.	Neutral type catalyst
B.	Solid catalyst
C.	Acid type catalyst
D.	Gas type catalyst
Answer» D. Gas type catalyst