I have two queries w r t reciprocating compressor used in Butamer Butane Isomerisation process as Makeup Gas Compressor and second w r t fired heater
1) Makeup gas compressor is shown as 3 cyclinders on P & ID with each cylinder having separate pulsation dampener vessel and discharge PSVs. Also Gas from suction drum for first compressor goes to two lines/ One line is going to first cyliner of first stage and then secondly it is going to another cylinder B of firsr stage and then both outlets from A and B join together and go to discharge drum of first stage. Same thing is applied for three stages. I do not underrstand this . Request your help whether it is multi compressor train in parallel configuration or what ?
2) Second query is w r t Butane isomerisation process: I wan to know whether butane reacts with hydrogen in isomerisation reactor . If yes , in which reaction ? On P & ID hydrogen line is shown as Blankating gas or sulphur stripping gas . Please help me with the role of hydrogen in this process.