Articles tagged with Ammonia
Researchers at Nagoya University have developed an ammonia-free technique for producing GaN semiconductors, enabling high-quality growth at lower temperatures and reduced raw material consumption. This method also reduces the need for detoxifying systems and energy expenditure.
Researchers developed a crystalline solid that can adsorb and release ammonia, making it easy to recover. The material's high density and ease of desorption make it a promising solution for efficient hydrogen storage.
A research team at Ruhr University Bochum has developed a catalyst that can convert ammonia into hydrogen and nitrite, producing both a clean energy carrier and a fertilizer precursor simultaneously. The process doubles the hydrogen yield while minimizing nitrogen production.
Burning ammonia for maritime fuel could worsen air quality and lead to devastating public health impacts, even with cleaner engine technology and green production methods. The study suggests that stronger regulations could reduce premature deaths from 600,000 to 66,000 annually
Scientists developed an AI-powered system to track tiny devices that monitor markers of disease in the gut. The system includes a wearable coil and ingestible pill with optical gas-sensing membranes, pinpointing device location and measuring gases like ammonia. Future improvements aim to make the device smaller and more power-efficient.
Scientists from the Department of Energy's Lawrence Berkeley National Laboratory have discovered a new way to produce ammonia, an essential fertilizer and component of cleaning products, using rare-earth metals as catalysts. The process operates at ambient conditions, reducing energy consumption and promoting food security.
Researchers in Beijing found that combustion-related ammonia is a key contributor to ammonium in PM2.5 during severe haze pollution in winter. Most of these emissions come from local sources, including fossil fuels and biomass burning.
A new study suggests that ammonia could be a smart and energy-efficient fuel in the race to achieve net zero in shipping. The NTNU researchers' model shows that IMO's ambitions have a strong impact on shipowners' choice of propulsion systems.
Researchers have discovered a greener way to produce ammonia, essential for fertilizers, by developing a new catalyst that works stably at relatively low temperatures. This breakthrough reduces the amount of energy needed to synthesize ammonia, making it an attractive alternative to fossil fuels.
University of Illinois Chicago engineers have developed a new ammonia production process that meets several green targets. The process combines nitrogen gas and ethanol with a charged lithium electrode, producing ammonia at low temperatures and regenerating materials with each cycle. If scaled up, the process could produce ammonia at 6...
Researchers at Tohoku University's AIMR have developed a novel approach to electrocatalytic ammonia synthesis, utilizing transition metal disulfides as catalysts. The breakthrough relies on the in-situ generation of S-vacancies on the catalyst surface, significantly enhancing nitrogen reduction activity.
Researchers at a FAPESP-supported research center have developed an electrochemical nitrogen reduction process using iron oxide and molybdenum disulfide catalysts. This method eliminates the need for high temperatures and pressures, reducing power consumption and greenhouse gas emissions.
Researchers propose an ammonia induction strategy to improve the sulfur capacity of zeolite-based adsorbents, enhancing desulfurization performance in blast furnace gas. The method inhibits agglomeration, increases dispersibility, and improves diffusion of H2S, resulting in higher adsorption rates.
Researchers used HLRS's Hawk supercomputer to generate valuable thermodynamic data for chemical engineering research. The simulations provide insights into ammonia's fundamental properties and how they change when mixing with other molecules.
Researchers at Sophia University have optimized air–fuel mixing conditions for efficient ammonia combustion in engines, bringing us closer to viable ammonia-fueled vehicles. Swirling flow patterns promote better air and fuel mixing, leading to improved combustion and reduced emissions.
Researchers have identified two essential ferredoxins that play a key role in determining the performance of iron nitrogenase. The discovery opens up new possibilities for elucidating and maximizing nitrogenase's potential, which could lead to sustainable enzymatic production of ammonia and carbon compounds.
A study from Chalmers University of Technology found that the production and use of ammonia as a marine fuel can lead to eutrophication, acidification, and emissions of potent greenhouse gases. Researchers warn that the pursuit of low-carbon fuels may create new environmental challenges.
Researchers created an AI-enabled model to help mitigate global ammonia emissions from agriculture. By optimizing fertilizer management, the model can effectively reduce emissions by up to 38%, with Asia having the highest potential for reduction.
Novel research by University of Oklahoma-led team improves understanding of ammonia oxidation, a critical component of the global nitrogen cycle. Different AOM lineages employ varying regulatory strategies to minimize competition, allowing coexistence in the same environment.
Researchers at Stockholm University have successfully studied the surface of iron and ruthenium catalysts during ammonia production, shedding light on the reaction mechanism. The findings open up possibilities for developing more efficient materials, which could contribute to a green transition in the chemical industry.
Researchers explore potential routes for sustainable nitrate supply, species balance, and catalyst stability in electrochemical nitrate reduction for ammonia synthesis. Innovative strategies are proposed to address mass transfer limitations and ensure long-term stability.
Researchers from China have developed an algorithm to derive atmospheric ammonia concentrations from the HIRAS instrument on the FY-3D satellite. This marks the first global map of atmospheric ammonia observed by the HIRAS instrument, providing crucial insights into its environmental impact and climate change implications.
Researchers at UW-Madison have developed a new electrochemical method to extract ammonia and potassium from livestock manure, reducing pollution and producing valuable fertilizers. The technique shows promise in scaling up beyond proof-of-concept stage.
A new study from the University of Illinois finds that extreme rainfall leads to significant spikes in nutrient concentrations, particularly after ½ inch, 1 inch, and 2 inches of precipitation. However, agricultural management practices such as cover crops can lower nutrient levels in water and persist until the end of the growing season.
Researchers at Washington State University have developed a single strand of fiber that combines the flexibility of cotton with the electric conductivity of polyaniline. The newly created material showed good potential for wearable e-textiles, including detecting hazardous exposures and tracking human vital signs.
Researchers have designed micromotors that purify wastewater and create ammonia, a potential green energy source. An AI method developed at the University of Gothenburg will be used to optimize the motors' performance.
Researchers at Princeton University found that an ammonia economy can help achieve decarbonization goals, but it poses risks if not managed properly. The widespread use of ammonia could lead to significant emissions of nitrous oxide and nitrogen oxides, affecting air quality, water quality, and ecosystems.
Researchers at UNSW Sydney have developed a method to produce ammonia without high temperatures, pressures, and infrastructure. The new technique enhances energy efficiency and makes environmentally friendly ammonia economically feasible.
A team of researchers has detected ammonia isotopologues in the atmosphere of a cold brown dwarf, providing new clues to understanding gas giant formation. The ratio of two isotopologues reveals that the exoplanet formed through gravitational collapse, challenging traditional theories.
Existing UK air pollution regulations will reduce thousands of premature adult deaths, but have limited impact on protecting sensitive ecosystems. The study found that even with the most effective technically feasible measures, air pollution would still harm UK's natural habitats and ecosystems.
A team of scientists has successfully caught fast-moving hydrogen atoms within ammonia molecules using ultrafast electron diffraction. They observed the motion of hydrogen atoms and captured the associated change in the molecule's structure as it evolved, providing insights into proton transfers.
A recent study evaluates the feasibility of ammonia-based power generation through techno-economic and carbon footprint analyses. The research reveals an impressive energy efficiency rate of 46.7% within the designed power generation process, with costs and greenhouse gas emissions considered.
A new artificial olfactory system, integrated on a single chip, detects food spoilage by identifying low levels of hydrogen sulfide and ammonia gases. The system tracks freshness scores in real-time during the spoilage process.
Researchers found long-term disruptions in Saturn's atmosphere, caused by past megastorms, which persist for hundreds of years. The study revealed that ammonia gas is being transported from the upper to lower atmosphere via precipitation and reevaporation processes.
Researchers discuss the potential of using ammonia as a hydrogen carrier for on-site power generation via ammonia decomposition. The high hydrogen content (17.6 wt%) and low toxicity make it an attractive alternative to traditional hydrogen storage methods, but challenges such as leakage and toxicity need to be addressed.
Researchers develop a highly active, precious metal-free catalyst for ammonia decomposition. The new Ni-based catalyst outperforms conventional alternatives at lower temperatures, offering a promising solution for hydrogen production from ammonia.
A new study identifies reducing ammonia emissions as a cost-effective measure to reduce fine particulate matter concentrations in Europe. Implementing effective measures in the agricultural sector could achieve significant pollution reductions, avoiding 100,000 premature deaths annually.
Bacteria can regulate nitrogen fixation through a protein called NifL, which changes shape in response to oxygen and energy levels. This discovery could lead to new ways to engineer bacteria and biofertilizers, improving crop yields in poor soils.
A study published in Environmental Chemistry found that over a third of synthetic nitrogen fertilizer use is breaking UK government emissions thresholds. Uninhibited urea fertilizers are the worst offenders, emitting up to 77% of applied nitrogen into the air.
Researchers successfully fabricate a microlens on a single-mode polarization-stable VCSEL chip using 2-photon-polymerization 3D printing, reducing beam divergence from 14.4° to 3° and enabling compact optical gas sensors with improved performance.
Researchers at RIKEN CEMS have discovered a perovskite compound that can safely store corrosive ammonia gas as a nitrogen compound, allowing for efficient storage and retrieval of hydrogen. The process is much cheaper than traditional methods and can be repeated multiple times.
A new study finds public backing for biofuel and hydrogen as alternative fuels to reduce greenhouse gas emissions in the global shipping industry. The research suggests that nuclear power is also a viable option, while ammonia has the least public support due to its perceived risks.
Aarhus University's AELECTRA project aims to develop a decentralized technology for producing liquid ammonia from renewable energy. The new process could halve investment costs and enable farmers to produce their own fertilizer or e-fuels, reducing greenhouse gas emissions.
Researchers have discovered the formation and decay process of solvated dielectrons for the first time, using ammonia droplets containing a sodium atom. The process involves one electron migrating to solvent molecules while the other is ejected, with potential applications in reducing agents and chemical reactions.
Researchers have developed a novel support material called BaAl2O4-xHy that enhances the catalytic activity of cobalt nanoparticles, allowing for record-breaking ammonia production at low temperatures. The catalyst demonstrates improved activation energy and high reusability.
The review summarizes the recent progress of Li-eN2 RR, covering reaction mechanisms, catalysts developed, and electrolytes involved. It highlights the challenges and possible resolving strategies in the field. The study also discusses the importance of rational design of electrocatalysts and electrolytes for efficient NH3 production.
Stanford researchers develop a simple and environmentally sound method to produce ammonia by combining nitrogen from the air with tiny water droplets, requiring minimal energy and low cost. This innovative approach could revolutionize agriculture and reduce greenhouse gas emissions associated with current industrial methods.
Researchers developed a stable and active catalyst for CO2 hydrogenation at room temperature, achieving high conversion efficiency comparable to state-of-the-art heterogeneous catalysts. The PdMo intermetallic catalyst was synthesized via a simple ammonolysis process and demonstrated robustness and durability in various conditions.
Researchers found a 40% reduction in ammonia emissions and a two-thirds decrease in methane emissions by acidifying slurry with sulfuric acid. The method also improves fertilization and could be optimized to achieve even higher reductions.
Scientists have developed a new catalyst that enables the production of ammonia at lower temperatures, reducing energy consumption and potentially lowering global carbon emissions. The BaH2–BaO/Fe/CaH2 catalyst facilitates nitrogen gas adsorption, resulting in enhanced catalytic activity for ammonia production.
Researchers at Max Planck Institute developed an ammonia-based direct reduction process to produce sustainable iron and steel, overcoming logistics and energetic disadvantages of hydrogen. The process yields the same metallization degree as hydrogen-based reduction while forming nitrides that protect the sponge iron from corrosion.
Researchers have developed a novel process to convert nitrogen and hydrogen into ammonia at ambient temperature and pressure with high energy efficiency. The process uses a solid polymeric electrolyte and eliminates the need for purification, producing pure ammonia gas.
Researchers from Osaka University have improved the Faradaic efficiency of nitrogen reduction into ammonia at ambient pressure using trace water. This work helps optimize the sustainability of the Haber-Bosch reaction, which contributes substantially to global carbon emissions.
A study by the University of Bonn has confirmed a significant reduction of methane emissions in slurry by 99% using calcium cyanamide, a long-standing fertilizer. This additive suppresses microbial degradation processes, resulting in lower greenhouse gas production during long-term storage.
A new study by the University of Illinois at Urbana-Champaign demonstrates an approach for integrated capture and conversion of nitrate-contaminated waters into valuable ammonia using a single electrochemical cell. The device shows significant enhancements in energy efficiency, nitrate removal, and ammonium production rate compared to ...
Researchers discovered the most efficient way to produce ammonia through electrochemical synthesis, increasing its sustainability. The D5 step site on ruthenium nanoparticles was found to be the most active site for the nitrogen reduction reaction.
UC Berkeley chemists designed and synthesized porous materials that bind and release ammonia at moderate pressures and temperatures, saving energy. The new MOFs could enable a more sustainable fertilizer production by producing ammonia closer to farmers.
Researchers at KAUST developed a high-efficiency metal-free battery using ammonium cations as charge carriers, outperforming existing analogues with a record operation voltage of 2.75 volts. This breakthrough provides potential for lowering battery costs and enabling large-scale applications.
Scientists at UC Riverside have discovered that volatile repellents containing ammonia and amines can be used to combat insect-borne diseases by disrupting their sense of smell and taste. The research found that these compounds can silence olfactory neurons in mosquitoes, preventing them from detecting human skin odor.
Research from Michigan Medicine reveals that high levels of ammonia in colon tumors can lead to reduced T cell growth and immunotherapy resistance. A study published in Cell Metabolism found that using an FDA-approved drug to lower ammonia levels made tumors more sensitive to treatment.