In many chemical and petrochemical processes, hydrogenation reactions are essential for converting unsaturated hydrocarbons into saturated ones, or for other functional transformations. These processes heavily rely on highly active and sensitive hydrogenation catalysts. However, trace amounts of arsenic (AsH3), often found in feedstock streams, can act as potent poisons to these catalysts, severely reducing their activity, selectivity, and lifespan. This makes arsenic removal a critical upstream purification step, a challenge addressed by advanced catalytic materials from providers like NINGBO INNO PHARMCHEM CO.,LTD.

Specialized catalysts, often based on copper oxide or other metal oxides supported on alumina, are designed for the effective removal of arsenic. These adsorbents or catalysts work by selectively reacting with and trapping arsenic compounds, preventing them from reaching and deactivating the sensitive hydrogenation catalysts. The high dispersion of active metals on the alumina support enhances mass transfer diffusion, allowing for maximum utilization of the active phase and ensuring deep purification of the gas or liquid streams. This is particularly important in the purification of light hydrocarbon streams such as propylene or propane, where arsenic can be present as an impurity.

The selection of an appropriate arsenic removal catalyst depends on the specific feed composition, operating temperature, and pressure. While copper-based adsorbents are widely used, other materials like lead oxide-based options may be preferred in certain high-reactivity scenarios where copper might form unstable compounds. Regardless of the specific formulation, the overarching goal is to protect valuable downstream catalysts. By proactively removing arsenic using efficient catalytic purification materials, industries can ensure the sustained performance of their hydrogenation processes, leading to improved yields and reduced operational costs.