Systems and methods for removing hydrogen sulfide from an ammonia stream

A method for removing hydrogen sulfide from an ammonia stream, which comprises:

• scrubbing an ammonia vapor stream in a water wash to remove hydrogen sulfide and produce a scrubbed ammonia vapor stream;
• scrubbing the scrubbed ammonia vapor stream in a caustic wash to remove residual containments and produce a double scrubbed ammonia vapor stream;
• introducing only the scrubbed ammonia vapor stream or the double scrubbed ammonia vapor stream into at least one of a compressor, a refrigeration unit and an ammonia absorber for producing at least one of an anhydrous liquid ammonia stream and an aqueous ammonia stream;
• and
• removing hydrogen sulfide from the ammonia vapor stream, the scrubbed ammonia vapor stream, the double scrubbed ammonia vapor stream, the anhydrous liquid ammonia stream and the aqueous ammonia stream using one of a respective adsorbent bed and a respective vessel with a liquid scavenger.