Fluid catalytic cracking unit

Today, many grassroots and revamped FCC units can process significant proportions of residue or even whole residue. In a modern FCC unit, hot catalyst from the regenerator is continuously contacted with the feedstock in the reactor riser so that the large hydrocarbon molecules can evaporate and crack into the desired lighter products. In the reaction process, coke is deposited on the catalyst which greatly diminishes its catalytic activity. After the reaction step, the coke-laden (spent) catalyst is separated from most of the hydrocarbon products in the stripper before proceeding into the regenerator. In the regenerator, the deposited coke and residual unstripped hydrocarbon on the catalyst are burnt off to restore its activity, (Sadeghbeigi, 2012, 91). •As environmental legislation on flue gas emission becomes increasingly stringent, regenerator design and operation also come under closer scrutiny since its flue gas can contain significant quantities of Sock, NOx and catalyst dust.

•As more refiners appreciate the impact of lost profits from unplanned downtime in an environment of poor refinery margins, FCC unit reliability is receiving more attention. Various new developments in the Fluid catalytic cracking unit are There has been an increase in various trends, shifts of naphtha crackers to ethane crackers, this then only makes propylene to have an effect from naphtha crackers to come down in a way to be able to maximize the gap in propylene, (Occelli & O'Connor, 2001, 11). Aside from these two fluidized catalytic cracking techniques, specific companies for the benefit of their production have licensed other techniques, (Occelli, 2010, 38). Due to high reliability, efficiency and safety conditions, the proposed plant will operate under the simple side-by-side fluidized catalytic cracking.