Question

For the following conditions, calculate the (a) wt% hydrogen in coke, (b) coke yield, and (c) catalyst-to-oil ratio.

O Carbon on spent catalyst = 1.50 wt%
O Carbon on regenerated catalyst = 0.80 wt%
O Air from blower = 155,000 lb/hr
O Hydrocarbon feed to reactor = 295,000 lb/hr
O Initial catalyst charged= 350 tons

Answer 1

To calculate the wt% of hydrogen in coke, divide the weight of hydrogen in coke by the weight of coke and multiply by 100. To calculate the coke yield, divide the weight of coke produced by the weight of hydrocarbon feed and multiply by 100. To calculate the catalyst-to-oil ratio, divide the weight of catalyst charged by the weight of hydrocarbon feed.

Step-by-step explanation:

To calculate the (a) weight percent of hydrogen in coke, divide the weight of hydrogen in coke by the weight of coke and multiply by 100. For example, if the weight of hydrogen in coke is 10 grams and the weight of coke is 100 grams, the weight percent of hydrogen in coke is (10/100) x 100 = 10%.

For (b) coke yield, divide the weight of coke produced by the weight of hydrocarbon feed and multiply by 100. For example, if the weight of coke produced is 50 grams and the weight of hydrocarbon feed is 200 grams, the coke yield is (50/200) x 100 = 25%.

For (c) catalyst-to-oil ratio, divide the weight of catalyst charged by the weight of hydrocarbon feed. For example, if the weight of catalyst charged is 10 grams and the weight of hydrocarbon feed is 100 grams, the catalyst-to-oil ratio is 10/100 = 0.1.