0

6.4kviews

Distinguish between Thermal & Catalytic cracking

written 7.0 years ago by vibhavarikulkarni • 510

modified 2.9 years ago by sagarkolekar ★ 11k

advanced engineering chemistry

ADD COMMENT FOLLOW SHARE EDIT

1 Answer

0

351views

written 6.9 years ago by vibhavarikulkarni • 510

•   modified 6.9 years ago

Sr. no	Thermal cracking	Catalytic cracking
1	No catalyst is used	Catalyst is used zeolite bauxite or bentonite can be used as a catalyst
2	Higher temperature and pressure is used Liquid phase, T = 420 – 5500 C,P = 15 – 100 kg / cm2,Vapour phase, T,= 600- 6500,P = 15 – 20 kg/cm2	Comparatively lower temperature and pressure is used Fixed bed, T = 425 – 5400 C,P = 1.5 kg / cm2,Moving bed, T= 550 – 5700 C,P = 1 kg / cm2
3	Yield of gasoline is 50-60 %	Yield of gasoline is more than 70 %
4	Octane rating is 70	Octane rating is 80-85
5	Cracked vapours contains lesser percentage of aromatic iso paraffins and less of gum forming diolifines	Cracked vapours contains greater percentage of aromatic iso paraffins and less of gum forming diolifines
6	Time required is comparatively more	Time required is comparatively less

ADD COMMENT SHARE EDIT