Technology

VOCs in industrial waste gas mostly exist in the form of mixtures, such as coexisting benzene series, esters and alkanes. Competitive adsorption widely occurs among different components on the catalyst surface. Some refractory components can inhibit the catalytic combustion efficiency of easily oxidized components. Catalyst formulation can rationally designed to Read more

1. Basic Introduction of Three Catalyst Types （1）Metal Honeycomb Monolith Catalyst Made of ultra-thin Fe-Cr-Al alloy foil as the substrate, processed into regular honeycomb structure via stamping, winding and brazing. Its surface is loaded with γ-Al₂O₃ rare earth coating and nano-scale Pt/Pd/Pt-Pd noble metal active components. As a monolithic honeycomb Read more

(especially vanadium/chromium/cobalt-based and noble metal catalysts) 1. Physical Regeneration Methods 2. Chemical Regeneration Methods 3. Combined Regeneration Methods Process flow: High-pressure purging → Solvent cleaning → Dilute acid/alkali washing → Water washing & drying → High-temperature calcination → Reduction activation → Active component replenishment Applicable scenario: Composite deactivation with carbon Read more

In the middle and late development stage of offshore oilfields, harsh conditions such as high salinity, high temperature, strong ion corrosion, limited platform space and extremely high operating costs restrict the application of conventional polymers. SMAS-based polymers have become the preferred material for offshore development for the following reasons:

Although the monomer price of Sodium Methallyl Sulfonate (SMAS) is slightly higher than acrylamide, SMAS‑based polymers show outstanding advantages in cost control during middle and late oil production.

In the middle and late stage of water flooding, reservoirs are featured with developed high-permeability channels, severe heterogeneity, high temperature and high salinity. Conventional gel systems are prone to dehydration, shrinkage, structural degradation and near-wellbore plugging, failing to reach deep formation. Compared with conventional gels, the gel system prepared with Read more

In the middle and late stages of low-permeability reservoirs, the pore structure is complex, with narrow throats and strong heterogeneity, making effective water injection and profile control extremely challenging. However, Sodium methallyl sulfonate (SMAS) can still be effectively injected without causing reservoir plugging, which is mainly attributed to its unique Read more

In the middle and late stages of low-permeability reservoirs, the pore structure is complex, with narrow throats and strong heterogeneity, making effective water injection and profile control extremely challenging. However, Sodium methallyl sulfonate (SMAS) can still be effectively injected without causing reservoir plugging, which is mainly attributed to its unique Read more

In deep‑well drilling fluids under high‑temperature conditions, sodium methallyl sulfonate (SMAS) copolymers significantly enhance fluid loss control primarily through an “adsorption‑hydration” synergistic film‑forming mechanism and the unique chemical stability of the sulfonate group (–SO₃⁻). Mechanism: Synergy between Adsorption and Hydration Stability under High‑Temperature Conditions High temperatures in deep wells severely challenge conventional polymers, Read more