Molecular sieves used for dehydration of natural gas and associated petroleum gas operate as adsorbents and are routinely regenerated in-cycle within the dehydration unit. However, during long-term operation, coke deposits and sulfur-containing compounds accumulate on the surface and inside the pore structure of the sieve. These species cannot be removed by standard in-cycle regeneration. As a result, the dynamic adsorption capacity decreases, leading to planned replacement of the adsorbent bed. After unloading, such molecular sieves are typically sent for disposal.

MOLECULAR
SIEVE
REACTIVATION

The process is specifically designed
to remove accumulated coke and sulfur species and is based on:
strictly controlled temperature profiles;
reproducible thermal treatment parameters;
precise control of treatment duration
and atmosphere;
minimization of thermal stress on the
material.

The technology allows to:
remove contaminants not eliminated during in-cycle regeneration;
preserve particle size distribution and crush strength;
retain specific surface area;
restore dynamic adsorption capacity
to design specifications.

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After reactivation, the molecular sieve meets technical specifications and can
be reused in the gas dehydration unit.
The economic benefit is achieved through:
reduction in procurement costs for fresh
adsorbent;
decreased disposal expenses;
lower logistics costs.

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REOCAT offers an alternative approach — reactivation of molecular sieves after planned unloading, restoring their operational performance and enabling reuse in the dehydration cycle.

REOCAT offers an alternative approach — reactivation of molecular sieves after planned unloading, restoring their operational performance and enabling reuse in the dehydration cycle.

reduction
in procurement costs for fresh adsorbent

Overall service costs for adsorbent management can be reduced by up
to two times compared
to full replacement.

The technology has been successfully validated in a pilot project at PJSC Gazprom facilities.

decreased
disposal
expenses

lower
logistics
costs

The economic
benefit is achieved through