Rezel high efficient ASR-1 additive (Arsenic Adsorbent) is suitable for petrochemical industry removing trace AsH3 from propylene stream and protects the polypropylene catalyst. Rezel-ASR-2 can remove trace As compound from petroleum cracking gas (acetylene /allylene) and inert gas. Not only remove AsH3, Rezel-ASR-3 remove the sulfur compound (H2S/COS) at the same time from propylene, propane, cracking trail gas and LPG.