Arsine is one of the most potent known poisons to downstream catalyst in hydrocarbon processing. Arsine (AsH3) contamination in parts per million (ppm) concentrations can have serious implications for downstream catalysts in hydrocarbon processing. Even at low concentrations, arsine can be highly toxic and corrosive, posing a significant risk to catalyst materials and overall process efficiency. This can result in reduced catalyst activity, lower conversion rates, and ultimately affect the overall performance and profitability of the production process. Special promoted Alumina catalyst has suitably developed pore structure, pore volume and surface area to allow optimum Arsine removal.