Articles tagged with Zeolites
A team of environmental chemists developed a new catalyst made from discarded coffee grounds that efficiently removes hydrogen sulfide, a highly toxic industrial gas, while producing elemental sulfur. The material was produced through a two-step process and demonstrated outstanding performance during laboratory testing.
Researchers at MIT developed a generative AI model called DiffSyn that suggests promising synthesis routes for complex materials like zeolites. By using this model, scientists can test millions of theoretical materials in under a minute, accelerating the materials discovery process.
Researchers developed high-performance biochar filters that capture both ammonia and tiny plastic particles from water, removing up to 64% of dissolved ammonia and over 97% of polystyrene microplastics. The study provides a practical way to clean polluted water while recycling agricultural waste and locking away carbon.
Researchers at Universiti Sains Malaysia create a new material capable of capturing carbon dioxide from the air using oil palm ash, achieving impressive adsorption capacity and stability. Machine learning predictions also enabled the design of a highly optimized mesoporous structure.
Researchers designed model cracking catalysts with controlled interfacial channel connectivity, enabling exploration of structure-diffusion-reaction relationships. Advanced characterization techniques revealed a pronounced 'funnel effect' from mesopores, accelerating interfacial diffusion and enhancing catalytic efficiency.
Teams developed a CO2 capture and conversion system that can handle a wide range of CO2 concentrations, even in the presence of oxygen. The system uses a zeolite adsorbent to rapidly adsorb CO2 and a separate catalytic reactor to convert it into a usable resource.
Researchers developed a theoretical model describing metal cluster migration and aggregation within individual zeolites, revealing key factors affecting catalyst stability. The model shows that increasing zeolite support properties can achieve 'migration-aggregation-self locking' of Pt species, creating ultra-stable catalysts.
A team of scientists at UNIST developed a data-driven structure prediction algorithm that led to the synthesis of three novel porous materials with exceptional selectivity in gas separation. The newly developed materials have significant potential for greenhouse gas separation and purification applications.
Researchers have developed a novel catalyst, ZEO-1, which exhibits high selectivity and stability in carbonylation and disproportionation reactions. The study reveals that ZEO-1's large cages promote DMM carbonylation and those in small cages favor DMM disproportionation.
Researchers develop a novel 'zeolite blending' method to synthesize CON-type zeolites with unprecedentedly high aluminum content. This approach enables precise control over Al content, opening possibilities for catalyst development in various industrial applications.
Researchers investigated MOR zeolite's unique pore structure, finding acid sites within 8-membered ring side pockets as active sites for syngas-to-ethylene conversion. A critical threshold of 60 nm was identified for 12MR channel length, optimizing ZnAlOx-MOR bifunctional catalysts with high CO conversion and ethylene selectivity.
Researchers from PolyU have discovered the precise location of aluminium atoms in zeolite frameworks, enabling the design of more efficient and stable catalysts. This breakthrough has wide-reaching implications for industries such as renewable energy and pollution control.
Researchers have developed a new aluminosilicate zeolite, ZMQ-1, with an intrinsic meso-microporous channel system that addresses the limitations of traditional zeolites. This breakthrough structure enhances catalytic processes in heavy oil cracking, achieving high conversion rates and selectivity for diesel production.
A new catalyst converts methane into polymers at room temperature and atmospheric pressure, making it easier to deploy at sites of methane production. The catalyst also enables the creation of sealants to heal cracks in natural gas pipes, potentially reducing methane leakage.
A team from Kyushu University has developed a zeolite catalyst that can be heated using microwaves to speed up the conversion of fatty acid esters to olefins. This process improves energy efficiency and reduces carbon dioxide production, offering a more sustainable chemical industry.
A Montana State University researcher has developed nano-scale materials that can convert carbon dioxide into chemical building blocks, marking a potential step forward in reducing atmospheric CO2. The materials mimic enzymes and have the ability to selectively capture CO2 from the air.
Researchers have discovered a novel transition-metal-free aluminosilicate ferrierite zeolite catalyst that enables direct conversion of methane to methanol. The new process achieves 305 π mol gˑ minǘ methanol production rate with high selectivity, presenting an environmentally friendly solution for converting greenhouse gases into valu...
A novel multifunctional catalyst has been developed to convert methane into valuable hydrocarbons, reducing greenhouse gas emissions and energy consumption. The catalyst's spatial distribution of Cu and acid sites determines the final products, with uniform distribution leading to stable and efficient methanol production.
Researchers develop Co@Y catalyst for selective ethylbenzene oxidation to acetophenone, showing superior performance and stability. The self-accelerating phenomenon is attributed to the generation of reactive oxygen species at the single-site cobalt center.
Researchers have developed a novel technique to analyze zeolites using 17O solid-state NMR. They improved the spectral resolution by addressing an often-neglected interaction and gained valuable information on zeolite structures. The technique revealed atomic-scale local environments of catalytically important moieties.
A new technique reduces toxic byproducts and increases efficiency in producing alkylbenzene, a crucial intermediate for detergents. The process uses simple alkanes as alkylating agents, resulting in harmless molecular hydrogen as the sole byproduct.
Zeolite-encapsulated metal catalysts show improved hydrogen-related catalytic reactions due to confinement effect, reducing sintering and leaching. Advanced characterization techniques are used to study fine structure of metal sites, enabling better understanding of catalytic performance.
Researchers have discovered a new form of carbon, LOPC, which consists of 'broken C60 cages' connected by long-range periodicity. The formation of LOPC occurs under specific temperature and carbon/Li3N ratio conditions, and its characterization reveals unique electrical conductivity properties.
Researchers have developed a new pure silica zeolite with extra-large pores in all three dimensions, enabling efficient removal and recovery of volatile organic compounds from gas streams. The discovery has potential applications in catalysis and drug delivery, and could be used to decontaminate sites where harmful chemicals are produced.
Researchers have developed new methods to prepare state-of-the-art zeolites with nano-sized dimensions and hierarchical structures, critical for industrial applications. The findings emphasize the importance of smaller size and structure in determining performance.
A research team discovered oxygenate-based routes in syngas conversion over oxide-zeolite (OXZEO) bifunctional catalysts using solid-state Nuclear Magnetic Resonance (NMR). The study revealed the mechanistic difference between OXZEO and traditional zinc oxide and zeolite catalysts.
Researchers have developed a novel route to transform CH3Cl to acetic acid through carbonylation, achieving high selectivity and efficiency. The study proposes a reaction mechanism involving chemical adsorption, formation of acetyl groups, and hydrolysis.
Researchers aim to improve stability and efficiency of catalytic materials using quantum mechanics-based calculations and computational simulations. The goal is to create more effective catalysts that reduce pollution and energy consumption.
A research team successfully synthesized isoparaffin-rich gasoline from syngas using ZnAlO x-SAPO-11 oxide-zeolite (OXZEO) catalysts. The study achieved high selectivity for iso-/n-paraffins, with a ratio of up to 48.
The discovery of single-walled zeolitic nanotubes by researchers at Georgia Tech, Stockholm University, and Penn State University has the potential to revolutionize the field of materials science. The team found a unique arrangement of atoms in the zeolite nanotube walls that allows it to form as a 1D tube rather than a 2D or 3D material.
Researchers found that Al atoms in FER-type zeolites are constrained at T1 and/or T3 sites, leading to inactive Brønsted acid centers. This limits the catalytic performance of FER-type zeolites compared to MOR-type zeolites.
Researchers analyzed ancient zeolite specimens to discover that some prefer lighter isotopes, while others prefer heavier ones. This finding could help quantify temperatures in geologic systems and mitigate human-caused climate change.
Researchers at the University of Illinois discovered that tiny porous crystals called zeolites can speed up chemical reactions by changing the shape of water molecules. This approach could lead to more sustainable and environmentally friendly industrial processes.
Researchers design a new strategy for producing pentanoic biofuels by synthesizing Ru metal nanoclusters confined within zeolite Y. This approach boosts chemoselectivity and promotes catalytic activity. The findings extend the notion of 'the closer, the better' into biomass catalysis.
Researchers from Stanford University and the University of Leuven have discovered a process to convert methane into methanol at room temperature using iron zeolites. The 'cage effect' in the zeolite structure plays a crucial role in reactivating deactivated sites, enabling efficient production of methanol.
Researchers at Pohang University of Science & Technology (POSTECH) have synthesized two new thermally stable zeolites with improved catalytic activity. PST-32 and PST-2 exhibit higher activity than zeolite Y in producing ethylene and propylene, key raw materials for chemical products.
Research finds that water molecules in zeolites enhance chemical reactions for biomass conversion to biofuel. By optimizing pore sizes and water concentrations, the process can be made more efficient, saving energy.
Scientists from Okayama University have discovered a high-performance CO2 adsorption material in zeolites at room temperature. The discovery, reported in the Journal of Materials Chemistry A, opens up new possibilities for efficient air purification, including applications in space shuttles and concert halls.
Researchers have developed a new method for synthesizing zeolite catalysts that improves catalytic performance by up to five-fold. The improved hierarchical zeolite catalysts show unprecedented improvement in stability and selectivity, potentially reducing the need for costly turnarounds.
Researchers at Texas A&M University have developed an organic material that uses less energy to dry air, enhancing the efficiency of heating, ventilation and air conditioning (HVAC) systems. The polyimide-based dehumidifiers can bring down the cost of HVAC systems, which currently cost thousands of dollars.
Cu-based small-pore zeolites have been demonstrated to be promising candidates for NH3-SCR catalysts due to their unique structural features and physicochemical properties. The latest advances in Cu-SSZ-13 applied to the NH3-SCR reaction highlight the significant opportunity presented by zeolite-based catalysts.
Researchers aim to assess the efficacy of surface coating and aerosolized decontamination technologies to combat SARS-CoV-2 on surfaces and in the air. The studies will test various materials, application strategies, and exposure durations to determine viral and microbial decontamination strategies.
A team of researchers at KAUST has developed a highly porous metal organic framework (MOF) with a unique design that allows for the adjustment of its pore structure. The MOF, inspired by zeolites, features a sodalite topology with pores measuring up to 43 angstroms in diameter.
A research team from Dalian Institute of Chemical Physics regenerates deactivated catalysts in the methanol-to-olefins (MTO) process by transforming coke to active intermediates. This approach promotes light olefin formation and recovers catalyst activity, achieving high selectivity rates.
The ancient Maya created a water filtration system nearly 2,000 years ago, using crystalline quartz and zeolite to remove harmful microbes and toxins from drinking water. This innovative system would still be effective today.
Researchers at MIT have developed a more practical and efficient solar-powered system that can extract drinkable water from dry air, doubling its output compared to an earlier version. The new system uses a readily available adsorbent material, increasing scalability and feasibility for remote regions with limited access to water.
A team of chemical engineers developed a simplified chemistry for zeolite membrane synthesis, eliminating lengthy crystallization and producing high-temperature hydrogen-carbon dioxide separation membranes. The scalable synthesis is expected to improve pre-combustion carbon capture energy-efficiency.
The researchers recommend returning to classic zeolites, which are efficient catalysts that can be modified and adapted for specific purposes. The team found inconsistencies in the literature on how aluminium atoms catalyse reactions, highlighting the need for further understanding of these active centres.
Scientists analyze state-of-the-arts in rational design of hierarchical micro-/mesoporous structures to alleviate diffusion resistance and improve catalyst efficiency. Well-designed hierarchically porous structure ensures rapid diffusion and desorption of products, avoiding deactivation.
Researchers developed finned nanoporous materials that facilitate faster molecular transport, reducing transportation limitations in zeolite catalysts. The new design triples the efficiency of conventional catalytic materials and enables longer catalyst lifetimes.
Scientists at Tata Institute of Fundamental Research developed nano-sponges of solid acid that convert carbon dioxide into fuel and plastic waste into chemicals. The material exhibits strong acidity and high surface area, making it a promising catalyst for sustainable processes.
An international team of scientists has made a breakthrough discovery using high-resolution transmission electron microscopy, revealing one-dimensional defects in two-dimensional zeolite nanosheets that improve filtration properties. The findings suggest enhanced separation and catalysis capabilities for molecules based on size and shape.
Scientists at UMass Amherst have discovered a new way to understand the structure and vibrations of zeolites, which are used in refining petroleum and biomass. The team's findings provide insights into the formation of nanopores and dynamical behaviors, leading to potential advances in materials for clean energy and carbon capture.
A new bio-based hybrid foam material has been developed to capture carbon dioxide, offering high efficiency and low operating costs. The material combines zeolites with gelatine and cellulose to create a durable and lightweight substance with excellent CO2-adsorbing properties.
New technologies have successfully established zeolite nanoparticle production methods, enabling size control and mass production. The 'bead-milling and recrystallizing method' produces nanoparticles < 100nm, while the 'particle growth method' generates larger particles from 150-300nm.
Researchers at MIT have developed a mathematical approach to understanding zeolites, revealing why only a small subset has been discovered or made. The graph-based model predicts which pairs of zeolite types can be transformed from one to the other, opening doors for new pathways in production and potential discoveries of novel materials.
A team of researchers from the University of Delaware and Jilin University has synthesized the most stable crystalline porous material on record, a polyarylether-based covalent organic framework. This material can sift antibiotic residue out of water in a pH ranging from 1 to 13 and is stable up to 400 degrees Celsius.
Researchers from the University of Houston and Pacific Northwest National Laboratory are investigating what causes nuclear waste glass to dissolve over time. They found that zeolite crystals facilitate faster dissolution, and are exploring ways to slow or impede their formation.
A University of Houston engineer is leading a $800,000 project to improve the safety of storage containers for nuclear waste. The team will explore ways to reduce or avoid the degeneration of glass containers used to store radioactive waste.
Researchers discovered that only small clusters of four silver atoms in a tetrahedral shape surrounded by water molecules emit light. This is due to the movement of two free electrons, which decay from higher to lower energy levels and produce a specific shade of green light.