What do you do with a spent catalyst?

The traditional way of disposing the spent catalysts is land filling which is not environmentally friendly and occasisionally it leads to ground water contamination.

What is spent refinery catalyst?

Spent catalyst is the raw material for a recycling operation that delivers fresh catalyst and specialist metals.

What is catalyst waste?

Abstract. Solid catalysts containing metals, metal oxides or sulfides, which play a key role in the refining of petroleum to clean fuels and many other valuable products, become solid wastes after use. In many refineries, the spent catalysts discarded from hydroprocessing units form a major part of these solid wastes.

What is hydroprocessing catalyst?

Hydroprocessing is the name given to a series of chemical reactions that take place as part of oil refining, and include hydrogenation, hydrocracking and hydrotreating.

How do you regenerate a spent catalyst?

Catalyst regeneration involves the processing of spent catalysts in order to make them reusable. This is done by restoring the initial properties of spent catalysts and thus restoring their efficiency through a process called regeneration of catalysts.

What is spent catalyst Wikipedia?

The inhibitions in catalytic performance are accounted by different factors such as physical losses, steam, high temperature, time, coke formation and poisoning from metal contaminants in feedstock. This type of deactivated catalyst is referred to as “used or spent” catalyst or equilibrium catalyst or simply “ECAT”.

Is Spent catalyst a hazardous waste?

Due to their toxic nature, spent hydroprocessing catalysts have been branded as hazardous wastes, and the refiners are experiencing pressure from environmental authorities to handle them safely.

What is refinery hydroprocessing?

Hydroprocessing covers a range of catalytic processes including hydrotreating and hydrocracking for removal of sulfur, oxygen, nitrogen and metals. The process is critical in the production of low sulfur fuels to reduce emissions, as removing the S reduces SOx emissions when fuels are combusted.