We monitor the VOC emission comes from our VR, Asphalt and MCB(Main Column Bottoms from RFCC) tanks regularly, and found the VOC emission range from several hundreds to several thousands ppmv.
These tanks are fixed roof design followed API code.
The VOC contains C1, C2 and C3 compounds mainly, and trace sulfur compounds with bad smell.
Since we have successful experience of caustic scrubber installed downstream of tanks to remove trace sulfur compound (i.e. H2S). We plan to install a downstream scrubber to improve this situation. Would you please advice which solvent is suitable for this application (for light hydrocarbon removal from vent), or other system can be used?