Acetylene Hydrogenation - Consultancy Ethylene Plant Flowsheets Placement of Acetylene Hydrogenation Reactor Cracker Feedstock / Product Variability Acetylene Reactor Feeds Reasons for Acetylene Removal Reacting Components and Conditions Reactor Operation and Reacting Components Reactor Design Selectivity vs. Temperature and Ethane Formation Effect of CO Poisons Green Oil Turndown H/D Ratio and Pressure Drop Thermocouple Placement Start-up Problems During Start-up Shut Down Regeneration Catalyst Experience, Problems and Other Information Front End / Tail End Comparison