How much heat is generated by catalytic regeneration when burning one ton of coke? Can several tons of coke be burned to generate heat energy for producing one ton of steam?

The energy content of saturated steam is over 2700 KJ per kg, and the lower heating value of coke is greater than 5000 KJ per kg – no problem at all.

I remember that 1 ton of coke can produce 10 tons of steam; I’m not sure if that’s correct

I estimated it in the same way; I’m not sure if there’s a more accurate or faster algorithm.

I’m very curious – in what form of catalytic coking can 1 ton produce 10 tons of steam?

I remember that 1 ton of coke can produce 10 tons of steam; I’m not sure if that’s correct

Generally, it can be estimated as follows: the energy consumption base for coke is 950, while that for medium-pressure steam is 88. Normally, it’s no problem to produce 15 tons of steam per ton of coke; taking energy losses into account, 10 tons should also be feasible. It’s impossible in actual operating conditions to convert all heat completely; you need to estimate it yourself by considering your specific operating conditions along with the heat transfer process! Good luck!

Under normal circumstances, the calculation is based on the thermal equilibrium of the device; it involves adjusting values according to the total heat released by the coke and the distribution of the absorbed heat, and the quality of the corresponding steam must also be determined.

Taking our unit as an example, with a capacity of 1.2 million tons per year for heavy oil catalytic cracking, if we perform a heat balance only within the regenerator, and considering that the heat taken in from outside is in the form of saturated medium-pressure steam, the amount of steam generated per ton of coke is 3.5 kilograms per kilogram of coke. However, taking into account the heat recovered from carbon monoxide and sensible heat in the flue gas, as well as the heat absorbed by the riser and released in the distillation tower, the corresponding value is even higher. Based on the overall steam production, calculated as superheated medium-pressure steam, this is approximately 9.0 kilograms of steam per kilogram of coke. The approximate distribution of the heat released by the coke here is as follows: heating of the main air, heating of the coke, external heat extraction, absorption by the riser, and heat loss (heat balance calculated separately for the regenerator).