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To all, Sounds to me that you've all put in a strong case for selective scrubbing. As for the regeneration process, I was refering to using process that I come across on the web, and the details I have are sketchy at best. Thanks again for all the help and an amine-based solution is the way...

kenvlach: Thanks for reminding me that I should be looking at hypoclorite as well as caustic. When you say that sodium sulfate has a lower solubility than thiosulfate, does that imply that it could be more easily extracted? TomSD: Is (caustic + hypo) a more common process from your experience...

Helllo, I'm interested in regenerating 20% caustic solution for a H2S scrubbing process, < 1 atm, 25'C gas conditions. The gas contains 60% CH4, 38% CO2 and ~2% H2S, liquid dispersion is via spraying nozzles to minimize CO2 absorption by minimizing contact time. During the regenerative...

PeterAB, A scrubber manufacturer pointed out that fact about the CO2 to me already actually. He suggested using a selective H2S scrubbing liquid with a tradename of Sulftrol. I was going to go with liquid distribution via spray nozzles all along, now I have another good reason to! Thanks to...

PeterAB, That is usually the case with dilute gases and fast chemical reaction in the absorption? My application is biogas, which is formed from the biological breakdown of wastewater sludge. I'm under the impression that biogas isn't a dilute gas, having a composition of 60% CH4, 38% CO2 and...

Hello, I'm working on a biogas scrubbing project. I want to calculate the inlet temperature of the gas at the scrubber. But I'm missing some vital gas properties: Kinematic or absolute viscosity Conductivity Prandtl number If anyone knows where to point me in the right direction to find these...

Dear all, FRP is my prefered option for tankage and storage. PVC for pipes. Thanks for all the really helpful links.

PeterAB, Thanks for the reply, but had figured as much. But like to have an idea myself of the calculations if possible. Quotes are coming as we speak...

Hello all, Just a quick one I feel. I'm designing a caustic scrubber and I would some info on suitable coatings that's typically used to protect metals any other materials against caustic corrosion. Thanking you in advance..

Not having Perry's handbook, can anyone give me the basic equations to size a gas liquid absorption scrubber tower? All gas properties are known and the constituent to be removed is H2S. Thanking you in advance....