H2S gas scrubbing and monitoring system for laboratory applications

A system for scrubbing and monitoring H2S from a gas canister containing a hydrocarbon gas with H2S, the system comprising:

• a sample inlet valve that controls an input stream of the hydrocarbon gas from the gas canister;
• a first scrubber that removes a first portion of H2S from the input stream and that outputs a first stream with less H2S than the input stream;
• a second scrubber that removes a second portion of H2S from the first stream and that outputs a second stream with less H2S than the first stream;
• a H2S converter that converts all remaining H2S in the second stream into a di-ketone and that outputs an output stream with a concentration of the di-ketone;
• an optical detector that measures the concentration of the di-ketone in the output stream;
• a processor that determines a concentration of H2S in the second stream based on the concentration of the di-ketone in the output stream, wherein
• the first scrubber includes a triazine solution that removes the first portion of H2S from the input stream, and
• the second scrubber includes a copper oxide that removes the second portion of H2S from the first stream.

A method for scrubbing and monitoring H2S from a gas canister containing a hydrocarbon gas with H2S, the method comprising:

• controlling an input stream of the hydrocarbon gas from the gas canister with a sample inlet valve;
• removing a first portion of H2S from the input stream with a first scrubber that outputs a first stream with less H2S that the input stream;
• removing a second portion of H2S from the first stream with a second scrubber that outputs a second stream with less H2S than the first stream;
• converting all remaining H2S in the second stream into a di-ketone with an H2S converter that outputs an output stream with a concentration of di-ketone;
• measuring the concentration of the di-ketone in the output stream with an optical detector;
• and
• determining a concentration of H2S in the second stream based on the concentration of the di-ketone in the output stream;
• connecting the gas canister to an enclosure that includes a sample inlet valve and that encloses the first scrubber, the second scrubber, the H2S converter, the optical detector;
• and
• venting the output stream from the enclosure into a walk-in fume hood that encloses the enclosure.