Spherical molecular sieve catalyst composites enable selective catalytic reduction of nitrogen oxides across a wide temperature range.
Incorporating hollow mineral microspheres into a calcined catalyst support matrix reduces material density while preserving mechanical strength.
Flow reversal purges adsorbents while heat exchangers recover thermal energy from indoor air streams to lower regeneration power requirements.
Single-stage hydrothermal crystallization produces high-copper CHA zeolites without phosphorus, eliminating contamination and reducing process complexity.
Rhodium supported on ceria removes nitrous oxide emissions while maintaining thermal stability.
Direct ammonia injection into the combustion zone reduces system complexity and cost while maintaining effective NOx removal across varying load conditions.
Incorporating iron salt into a promoter metal-molecular sieve catalyst composition forms active iron species on the surface.
Seed crystals initiate crystallization of zeolitic materials with a BEA framework structure under mild hydrothermal conditions.
Segmented lean NOx adsorber catalyst layers combine platinum-palladium oxidation with alkaline earth storage.
A face mask arrangement uses switching means to alternate inhalation of nitrous oxide and oxygen mixtures for patient-controlled administration.
Cryptomelane manganese oxide and cerium oxide convert formaldehyde to carbon dioxide, solving desorption issues found in activated carbon systems.
Amorphous mesoporous metal oxide combined with zeolitic material enhances catalytic activity, resolving high-temperature stability trade-offs.
Adjusting air-fuel pulses by exhaust temperature reduces N2O formation while maintaining NOx storage effectiveness.
Segmented hydrocarbon injection maintains NO2 production levels within oxidation catalytic converters during exhaust gas aftertreatment operations.
An SCR exhaust gas purification system monitors temperature rates to control urea injection and sensor diagnostics.
In situ hydrothermal synthesis coats porous substrate inner surfaces with catalytic zeolite, preventing pore clogging and reducing backpressure.
A segmented catalyst article combines a passive NOx adsorber with an ammonia slip catalyst to manage emissions.
Intermediate discs in the SNCR nozzle create multiple injection planes, expanding the evaporation zone to treat larger flue gas volumes without catalysts.
A hybrid oxidation catalyst system uses noble and base metal layers to oxidize exhaust components.
Covalently bound metal oxide nanoparticles in zeolite crystals improve catalyst durability and cold-start performance by reducing water holding capacity.
Physical adsorption removes NOx from cooled flue gas without catalysts, eliminating secondary pollution and reducing operational costs.
Segmented coatings with cerium oxide oxygen storage improve NOx, CO, and THC conversion during cold-start periods.
A compact exhaust aftertreatment device segments selective catalytic reduction across two distinct catalyst organs to optimize thermal response.
Replaceable adsorption units collect exhaled nitrous oxide via docking arrangements, avoiding complex centralized infrastructure costs in small clinics.
Residual gas recirculation maintains purification system temperature during plant startup and shutdown phases.