A novel configuration for Pd/Ag/α-Al2O3 catalyst regeneration in the acetylene hydrogenation reactor of a multi feed cracker

Heat exchanger application for environmental problem-reducing in flare systems of an oil refinery and a petrochemical plant: Two case studies

“…Recently, Rahimpour et al [54] and Dehghani et al [55] suggested new configurations to reduce coke and green oil formation during acetylene hydrogenation process. Recently, several studies were conducted on efficient methods for flare gas minimization during ethylene plant start-ups [56][57][58][59][60][61][62].…”

“…The fuel gas used for the regeneration of the catalyst, strips out the deposited green oil and coke on the molecular sieves, contaminating the fuel gas with the green oil [54]. The flue gas from catalyst regeneration discharged directly into the atmosphere or flared.…”

“…The process flowsheet of the studied plant was described completely in another work [54]. The flare gas emission causes the following problem:…”

Influence of Support Structural Characteristics on Long-term Performance of Pd-Ag/α-Al2O3 Catalyst for Tail-end Acetylene Selective Hydrogenation

“…In tail-end hydrogenation process, that is the most commonly implemented in plants worldwide; hydrogenation takes place after the removal of light compounds (H 2 , CH 4 and CO). After the cracking process, hydrogen is split from the main stream and the rest is separated into C 2 , C 3 , and C 4 + groups (Rahimpour et al 2012).…”

Online estimation for catalyst activity of acetylene hydrogenation reactor

“…As the catalyst activity slowly declines with time, the operation must be adjusted. Modeling of catalyst deactivation has been studied by many scholars . Several catalyst deactivation models are proposed, and the majority of studies consider that the catalyst deactivation is related to temperature and catalyst poisoning .…”