Dry gas production of the catalytic unit
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I would like to ask my colleagues: what is the typical dry gas production volume of catalytic units? How can dry gas production be reduced in normal operations?
The dry gas yield in heavy oil catalytic cracking is generally between 3–5%; reducing the dry gas production involves decreasing the reaction depth, minimizing the contamination of the catalyst by heavy metals, and improving the absorption efficiency of the absorption towers and reabsorption towers
The control here is no more than 3%. The control method mainly depends on the reaction depth, which should be kept around 520°C (for our raw materials, each facility determines its own appropriate parameters based on the characteristics of those materials); by controlling this at the source, the subsequent control measures serve only as supplementary tools!
The key lies in the choice of raw materials; if corporate profitability is the goal, by reducing raw material costs and seeking the highest slag inclusion ratio in the catalytic unit, the dry gas yield will inevitably be higher. Operational adjustments must adapt to changes in the properties of the raw materials.