Molecular Sieve Catalysts TRIZ Cases

Chemical etching expands zeolite Y pore size to 2-50 nm, allowing heavy oil aromatics to reach active sites and reducing coking during conversion.

Replacing zeolite framework atoms with rare earth elements boosts nitrogen oxide adsorption capacity to meet stricter exhaust regulations.

Alkaline-earth metal compound-containing zeolite catalyst resists aluminum elimination during steam regeneration, maintaining catalytic activity.

Optimized EMM-12 molecular sieve with hydrogenation metals suppresses di-substituted by-products and improves cyclohexylbenzene selectivity.

Controlling silica layer thickness between 5 and 100 nm prevents pore burial while ensuring uniform zeolite distribution for higher NOx conversion.

Sequential acid and basic treatments adjust pH and temperature to boost YO2:X2O3 molar ratios without degrading crystallinity or hydrophobicity.

Segmenting the washcoat into distinct layers with barium oxide storage and hydrocarbon trapping resolves high temperature stability issues in lean burn engines.

Potassium-modified ZSM-5 catalysts in methanol suppress decomposition pathways, sustaining activity and boosting methyl acrylate selectivity above 75%.

A composite catalyst combines a molecular sieve with dehydrogenation elements to drive hydrocarbon conversion.

Sequential reaction zones with varying catalyst alkalinity minimize methanol decomposition, boosting alkylating agent utilization efficiency.

Reduced unit cell size and sodium content in the zeolite catalyst extend lifetime during mixed plastic hydrocracking.

Oxygen-containing gas removes coke deposits from mordenite catalyst at 225-325°C, restoring catalytic activity without degrading product selectivity.

Hexagonal mesoporous silica supported niobium-tin catalyst resolves recovery difficulties in homogeneous systems while maintaining high reaction yield.

A continuous flow reactor crystallizes zeolitic materials using specific liquid hourly space velocities and temperatures.

Using 1,1-(pentane-1,5-diyl)bis(1-propylpyrrolidinium) as a template reduces crystallization time while increasing external surface area.

Sequential surface modification introduces hydrophilic groups outside and lipophilic groups inside a ZSM-5 sieve, preserving microporous structure integrity.

Mixing specific chemical sources during gel maturation produces zeolite Y with less than 100 nm crystal size and high Si/Al ratio.

A two-stage synthesis separates framework formation from element substitution, resolving the contradiction between process speed and product quality.

Segmented washcoat zones store hydrocarbons in a zeolite inlet layer and convert them with palladium downstream to resolve cold start emission trade-offs.

Segmented baffled reactor zones minimize feedstock back-mixing and control ethylene-propylene ratios while reducing catalyst requirements.

Segmenting a reactor with UZM-8 and beta zeolite catalysts manages exothermic heat while reducing catalyst replacement frequency.

A bifunctional MCM-41 catalyst system hydrogenates aromatics using Group VIII noble metals on a mesoporous support.

A bifunctional catalyst performs concurrent isomerization and hydrogenation of unsaturated polyalphaolefins in a single reactor.

Ion-exchanged synthetic phyllosilicates stabilize metal cations to reduce NOx emissions while maintaining ammonia retention at high temperatures.

Convert diols to olefins by forming dioxolanes and separating them from aqueous solutions.

Hierarchical pore structure overcomes restricted access to active sites, enabling complete nitrogen oxide conversion.

Deasphalted heavy hydrocarbon feed with low asphaltene content contacts a catalyst to reduce hydrogen consumption and prevent catalyst deactivation.

Recycles scrubbed synthesis gas from methyl acetate production into methanol reactors, minimizing carbon monoxide loss and reducing by-product formation.

Recycles waste MTO catalyst into SAPO-34 molecular sieve via crystallization and calcination, extending catalytic lifetime to 510 minutes.

Unsupported nickel molybdenum tungsten catalyst converts naphthenes to branched paraffins, raising viscosity index without expensive feedstocks.

Nickel-promoted bi-metal molecular sieve catalysts resist sulfur poisoning while maintaining high NOx conversion efficiency at low temperatures.

Segmented cyclone and electrostatic precipitation removes fine catalyst particles from regenerator flue gas, reducing downstream contamination.

Low-proton small-pore zeolites maintain hydrothermal stability above 800°C while reducing nitrogen oxides in automotive exhaust systems.

Co-modified bimetal and siloxane molecular sieve catalyst enables paraxylene production via co-conversion of methanol and C4 liquefied gas.

Optimizing silica-to-alumina ratios and Cu loading in CHA zeolites maintains NOx conversion efficiency above 76% after thermal aging.

Dual layered SCM-1 and SCM-2 molecular sieves expose semi-supercages to resolve selectivity stability trade-offs in catalytic applications.

JMZ-5 zeolites adopt sea-urchin morphology to enhance catalytic activity while eliminating asbestos-like health hazards from needle structures.

Microporous catalysts bound with organosilica materials eliminate energy-intensive calcination steps required for structure directing agent removal.

Water vapor pretreatment reduces coke deposition on zeolite catalysts, extending operational life and maintaining high methyl acetate production rates.

Aprotic catalysts hydrolyze organoalkoxysilanes to form cross-linked networks, eliminating corrosion from strong acid catalysts.

Zeolite-supported cobalt and nickel catalysts convert polyolefins into light alkanes, reducing methane production compared to precious metal methods.

ZSM-11 molecular sieve catalyst improves diesel cold flow properties while maintaining high product yield at reduced reaction pressures.

A baffled transition zone separates product vapors from catalyst solids using counter-current displacing gas flow.

Synthesizing mordenite molecular sieves with preferential B acid sites in 8-membered ring side pockets.

A selective catalytic reduction catalyst uses a copper-loaded beta zeolite layer on a chabazite support to manage ammonia storage.

Phosphorus-modified ZSM-5 combined with acid-treated alumina overcomes thermodynamic equilibrium limits to achieve greater than 85% p-xylene selectivity.

Gradient ammonia storage distribution on a catalyst carrier improves nitrogen oxide conversion, preventing breakthroughs during cold-start vehicle cycles.

EMM-25 borosilicate molecular sieve uses organic templates to form specific Al-B dual active sites for hydrocarbon conversion.

Using imidazolium structure directing agents to synthesize SSZ-113 molecular sieves, resolving the trade-off between pore diversity and synthesis complexity.

Ambient pressure reflux synthesis of CHA zeolite avoids high capital costs while maintaining catalytic performance by excluding potassium ions.