Adsorption Desulfurization Using Alumina Based Adsorbents

4 Adsorption Desulfurization Using Alumina Based Adsorbents [Pg.345]

The IRVAD process by Black Veatch Pritchard Inc. and Alcoa Industrial Chemicals is claimed to be a low-cost process for low-sulflir gasoline . The process uses an alumina-based selective adsorbent to counter-currently contact liquid hydrocarbon in a multistage adsorber. The adsorbent is regenerated in a continuous cross-flow reactivator using heated reactivation gas. The process operates at lower pressure, and does not consume hydrogen or saturate olefins. The adsorption mechanism is based on the polarity of sulfur compounds. It is not very selective for gasoline sulfur, and no information is available on diesel sulfur. [Pg.345]