Recovery of low-flow, high-concentration hydrogen sulfide
Thread Content
There is a hydrogen sulfide gas stream with a flow rate of ~64 kg/h and a concentration of 98%. Which recovery process should be chosen under these conditions?
Lye absorption, alkaline sulfide – a mature process that is safe! There’s a profit!
For design and equipment, you can contact me :）
It’s already 98%, which is pure enough. What are the impurities inside? Air, nitrogen, water vapor, inert non-condensable gases, other organic substances? Those organic substances? Do you want to further purify it? Still want to liquefy it? Or do you want to turn it into another compound? If it is mixed with a small amount of air, nitrogen, methane, carbon monoxide, or carbon dioxide and needs to be purified, the steam permeation membrane method is preferable; hydrogen sulfide passes through first, which is better than adsorption. If it is liquefied, compress it directly. If it is for the reactive absorption process to produce sodium sulfide or sodium hydrosulfide (NaHS), I recommend using membrane absorption. Membrane absorption involves using a membrane contactor in place of an absorption tower. Its advantages include independent control of gas and liquid flow rates, a large surface area, high mass transfer coefficients, a modular design that allows for adjustments in processing scale, high purity and concentration of the sodium sulfide product, and exhaust gases that meet regulatory standards. If you are interested, we can provide you with a live demonstration, free of charge.
If it is a mixture of ammonia and hydrogen sulfide, can it be absorbed by an alkaline solution?
It’s possible. Hydrogen sulfide reacts with sodium hydroxide to produce sodium sulfide or sodium hydrosulfide, while ammonia escapes or dissolves in the liquid
I’m thinking about this issue; I won’t mention the old methods, and someone suggested the Klaus method.