Molecular Sieve Catalysts TRIZ Cases

Rice husks act as a structural template during molecular sieve extrusion, reducing binder usage while maintaining mechanical strength and catalyst activity.

A zoned wall-flow filter substrate uses sequential SCR catalyst concentrations to reduce back pressure while maintaining NOx reduction performance.

Chlorine stripping increases the O/Cl ratio of metal chlorohydrates, redispersing noble metals within zeolite pores for effective regeneration.

SSZ-91 molecular sieves reduce hydrocracking and improve selectivity by maintaining low structural disorder and high polytype 6 purity.

Exposing deactivated metal-zeolite selective catalytic reduction catalysts to recovery fluids restores NOx conversion efficiency by mobilizing metal ions.

Circulating reaction solution over a film type catalyst in an external loop improves tertiary amine yield while eliminating complex catalyst filtration steps.

A silicon carbide porous material uses a cordierite parent phase with dispersed mullite to improve thermal shock resistance.

Rare earth faujasite and UZM-8 zeolite catalysts enable precise 2-phenyl isomer selection during linear alkylbenzene production.

A monolith filter unit combines urea hydrolysis and particle filtration in a single compact structure.

Specific molar ratios of silicon, aluminum, and phosphorus create a composite crystal structure that resists hydration while preserving solid acidity.

A benzene hydroalkylation process produces cyclohexylbenzene using specific catalysts and separation stages.

Segmented zeolite-iron catalysts convert nitrogen-rich syngas into liquid hydrocarbons in one stage, avoiding multi-stage purification costs.

Redispersing spent aromatization catalyst metals and applying halide treatments restores activity while minimizing equipment corrosion risks.

Segmented catalyst beds enable independent temperature control for stable fuel reforming.

Capillary condensation within micropores enables liquid-phase reactions at lower pressures, preventing catalyst deactivation from heavy oligomer deposition.

Gradient catalyst extracts hydrogen from carbon monoxide mixed gas to prevent contamination and reduce production costs in oxalate synthesis.

Adding a single-ring aromatic solvent like trimethylbenzene extends catalyst run length and minimizes coke byproduct formation during heavy oil conversion.

Transition metal impregnated zeolite catalysts convert mixed butenes into light olefins, reducing C4 side product formation.

Zeolite seeds initiate rapid SAPO-42 crystallization, eliminating complex mixing steps and expensive organic templates.

Microporous copper chloropyrophosphate framework with noble metal nanoparticles converts cyclohexanol to cyclohexanone while suppressing byproduct formation.

Upstream metal oxide catalysts suppress methanol side reactions to extend OTO catalyst lifetime and increase light olefin yield.

Tungsten oxide on mesoporous silica enables liquid phase nitration at low temperatures, eliminating hazardous sulfuric acid waste and improving selectivity.

Aerosol spray drying merges support synthesis and precursor deposition into one step, eliminating complex multi-stage processing for Fischer-Tropsch catalysts.

Acidic molecular sieve catalysts enable direct etherification of glycol monoethers with monohydric alcohols to produce double end-capped products.

Segmenting coatings into distinct zones applies local quality principles to minimize nitrous oxide formation during exhaust gas treatment.

Novel cationic structure directing agents enable efficient CHA-type molecular sieve crystallization using alkali metal silicate precursors.

Ammonium hydroxide treatment modifies mordenite zeolite to boost catalytic activity in methanol carbonylation without altering the silica-alumina ratio.

A Fe-Co-Mn metal oxide catalyst selectively reduces carbon dioxide to carbon monoxide at temperatures below 300°C.

Synthesizing SSZ-99 molecular sieve using methylethyldiisopropylammonium cation as structure directing agent.

Segmented micropore-mesopore structures resolve the trade-off between shape selectivity and diffusion limits in biomass upgrading.

A dual-layer NOx reduction catalyst combines absorption and purification components to process nitrogen oxides across varying temperatures.

A nickel molybdenum phosphorus catalyst upgrades naphtha hydrocarbons through selective hydrogenation.

Inorganic oxide carrier with hydrophobic surface and controlled chlorine content resists iodine poisoning while maintaining moisture resistance.

Inert gas treatment rejuvenates zeolite catalysts by removing coke and poisons while maintaining acidity levels below 15% loss.

Optimized ASDI zeolite USY and noble metal content in second-stage hydrocracking catalysts resolve productivity-reliability contradictions.

Merging Fischer-Tropsch synthesis and hydrocracking into one reactor eliminates complex separation schemes while preventing solid wax formation.

A layered LNT catalyst with segregated Pt, Pd, BaO, and Rh layers enhances NOx storage and purification rates in lean burn gasoline engines.

Pyrolyzed Fe-doped Zn-ZIF precursor yields single-atom Fe catalysts that boost CO generation rates while lowering production costs compared to noble metals.

A composite catalyst combines copper-CHA and iron-MFI zeolites to enhance selective catalytic reduction performance.

Bimodal pore distribution in partition walls absorbs catalyst slurry, increasing loading while minimizing pressure loss.

Replacing expensive organotemplates with N,N-dimethylpiperidinium hydroxide reduces production costs while maintaining catalytic activity.

A hydrocracking catalyst uses zirconium or hafnium framework substitution to enhance heavy hydrocarbon diffusion into mesopores.

Internal channel confinement in a porous zeolite support prevents catalyst particle aggregation under thermal stress, extending operational life.

A silver-carrying zeolite molded article disperses ions within a controlled Si/Al ratio structure to maintain high adsorption performance.

Splitting gasoline feedstock into light and heavy fractions enables targeted desulfurization using a mixed catalyst system.

Pre-carbon deposition in a multi-stage dense phase fluidized bed reactor eliminates induction periods and controls carbon content uniformity.

Inclined edge geometry reduces pressure loss and suppresses coking during acrolein oxidation to acrylic acid.

A composite hydrocracking catalyst converts difficult branched alkanes into chemical grade benzene using shape-selective zeolites.

A γ-ketovaleric acid catalyst lowers operating temperatures in hydrotreatment processes.

Replacing iodide-based homogeneous systems with a solid zeolite catalyst eliminates corrosion while maintaining high reaction productivity.