Articles tagged with Ammonia
Researchers have designed a new anaerobic reactor using polyurethane foam, reducing nitrogen removal costs in Brazil. The system achieves high nitrogen removal efficiency by creating an environment that optimizes denitrification.
Researchers discovered a link between the astrocytic urea cycle and Alzheimer's disease memory loss. The study found that the urea cycle helps clean up toxic amyloid-beta aggregates, but its activation also causes the production of harmful byproducts, leading to neuronal death.
A study by Rice University finds that agricultural nitrogen emissions cause substantial damage to air quality, human health, and the climate. The researchers quantified emissions from fertilized soils over three years and found that ammonia had a much larger impact on damages than nitrogen oxides and nitrous oxide.
Researchers use trace amounts of liquid platinum to create efficient chemical reactions at low temperatures, extending earth's reserves and offering CO2 reduction solutions. The liquid catalyst is over 1,000 times more efficient than its solid-state rival.
Research team from Goethe University reproduces Asian monsoon conditions in experimental chamber, identifying increased aerosol particle formation. The study found that ice clouds can form under lower water vapour supersaturation than anticipated, affecting climate models' accuracy.
Researchers propose that Ceres was formed outside the Frost Line, where ammonia ice is abundant, and then pulled into the Asteroid Belt by gravitational instability. Computer simulations support this hypothesis, showing that giant planet formation led to a turbulent environment that scattered objects into stable orbits.
Researchers have developed a full-set wireless self-powered ammonia leakage monitor system for ammonia-energy ships, which includes a honeycomb triboelectric nanogenerator-based power generation system and a carbon nanotube doped polypyrrole-based ammonia detection system. The system exhibited good performance with low detection limits...
Researchers create high-performance catalyst to pull ammonia and solid fertilizer from low-level nitrates in industrial wastewater, reducing carbon dioxide emissions. The process works at room temperature and under ambient pressure, with potential for decentralized ammonia production.
Researchers have made a breakthrough in controlling bacterial nitrogen fixation by cereals, enabling them to produce their own ammonia fertiliser. This development has the potential to reduce reliance on industrially produced ammonia-based fertilisers and mitigate environmental pollution and greenhouse gas emissions.
A new paradigm in atmospheric gas sensing has been achieved using a graphene sensor integrated with carbon molecular sieve functionality. The sensor demonstrates selective gas detection, including ammonia, at room temperature with a fast response time of seconds.
Researchers engineered Azotobacter vinelandii to produce ammonia and excrete it into crop plants, reducing water pollution. This approach could mitigate environmental pollution and provide sustainable solutions for nitrogen management in soil.
Researchers found that vehicular emissions are a significant source of ammonia in urban air during winter mornings, contributing to toxic pollution. The study used nitrogen isotopes to track the origin of ammonia and attributed 40% of morning concentrations to vehicle emissions.
A new method to produce hydrogen from water has been discovered, using cobalt and manganese as catalysts. This breakthrough could lead to a cleaner and more sustainable hydrogen economy, reducing reliance on fossil fuels.
Researchers at Hiroshima University have developed a process to synthesize ammonia from its constituent molecules of nitrogen and hydrogen at ambient pressure, paving the way for efficient use in renewable energy applications. The new method utilizes lithium hydride as a molecular scaffold to prevent clumping and increase reaction speed.
A study by Kyoto University found that migratory shrimp significantly enriched streams with nutrients, outperforming aquatic insects. The research highlights the crucial role of these small crustaceans in maintaining ecosystem balance and suggests integrating landscape management to support nutrient cycling.
A team of scientists used satellite images to track ammonia concentrations in the air above Los Angeles before and during the pandemic lockdown. They discovered that cars may produce up to 95% of this harmful pollutant throughout the city, significantly higher than previous estimates.
Researchers from South Korea have demonstrated that applying an electric field during air stripping can significantly improve ammonia removal efficiency from wastewater. The study found that electric fields with alternating current of 50 MHz and power of 15 V/cm increase efficiency from 51% to 94%, even under sub-optimal conditions.
Researchers found that vehicles accounted for 60-84% of total NH3 emissions in western Los Angeles, significantly higher than government estimates. This discovery suggests a substantial health impact from vehicle-related ammonia, which has been largely under-recognized and uncontrolled.
A combined experimental and computational study published in Nature Catalysis introduces a new class of complex metal hydride catalysts that can synthesise ammonia at temperatures as low as 300°C and pressures as low as 1 bar. These catalysts have the potential to pave the way for more sustainable means of ammonia production.
Researchers have developed efficient catalysts for ammonia synthesis under mild conditions using ternary ruthenium complex hydrides. The unique configuration and function mechanism of these complexes enables non-dissociative activation of nitrogen, leading to superior kinetics and favored ammonia production.
A NASA-led study tracks changes in atmospheric ammonia concentrations in Africa from 2008 to 2018, revealing rises and falls in ammonia emissions linked to agricultural activities. The research highlights the need for sustainable agriculture practices to mitigate the impact of growing populations on food security.
Researchers created a portable electronic nose that can detect the stink of wastewater treatment plants with near-human accuracy. The device is combined with a drone to measure air quality and predict odor intensity, producing real-time maps for management.
A global study reveals that reducing nitrogen compounds' contribution to PM2.5 air pollution is the most cost-effective measure to improve public health, with a cost of $1.5 per kg of NH3-N compared to $6.9 per kg for NOx-N abatement.
Researchers propose that giant hailstones called mushballs carry ammonia deep into the atmospheres of ice giants Uranus and Neptune, hiding it from detection. This process could explain the unexpected lack of ammonia in their atmospheres compared to other planets.
A team of researchers has successfully toilet-trained 11 out of 16 calves, reducing the risk of ammonia emissions and improving farm efficiency. The MooLoo training method involved rewarding successful latrine use and using gentle deterrents to encourage correct behavior.
Researchers develop a novel method to convert nitrate in wastewater into ammonia with nearly 100% efficiency and zero greenhouse gas emissions. The system utilizes cobalt catalysts and solar power to achieve unprecedented solar-to-fuel efficiency, outperforming existing technologies.
A new catalyst developed by Tokyo Tech researchers can generate hydrogen gas from ammonia at lower operating temperatures than existing methods. The calcium imide-supported Ni-catalyst produces good ammonia conversion and offers a promising solution for the production of clean hydrogen fuel.
Researchers developed a novel electrocatalyst by doping Cu with Ru, achieving higher Faradaic efficiency and yield rate for ammonia synthesis from nitric oxide. The optimized catalyst reduces reaction energy and desorption energy of ammonia, enabling efficient NO-to-NH3 conversion.
A new instrument measures atmospheric ammonia with high sensitivity and fast response, allowing for accurate quantification of NH3 emissions from agricultural ecosystems. The open-path design overcomes challenges faced by close-path instruments, enabling long-term and automated measurements.
A research team at UNIST has developed a novel technique that converts liquid ammonia into green hydrogen with high purity and efficiency. The method consumes significantly less power than traditional electrolysis of water, making it an attractive alternative for hydrogen production.
Researchers at IOCB Prague develop a method to prepare metallic water without high pressure, by dissolving electrons from alkali metal in water vapor. The resulting solution lasts several seconds and contains dissolved alkali cations and hydroxide and hydrogen.
Flies use their antenna to smell ammonia, which helps them find food sources and navigate. A new type of odor receptor, Amt, has been identified that allows insects to detect ammonia, and could lead to effective ways to block it.
Researchers at TU Freiberg create new composite material from marine bath sponges that can be used as a bi-based filter for wastewater treatment or pollutant removal, and can be reused multiple times without losing its properties.
A team of Monash University scientists has discovered a new process based on phosphonium salts to produce green ammonia from renewable energy. The process represents a major contribution towards the development of a sustainable fuel for the future, with potential applications in fertiliser production and as an energy carrier.
MIT researchers have discovered how metal clusters weaken the strong nitrogen-nitrogen bond, enabling microbes to convert nitrogen into usable forms. The study sheds light on the mechanism of nitrogenases, critical enzymes that fix nitrogen in the atmosphere.
Researchers have discovered a new oxygen-coordinated molybdenum single atom catalyst that exhibits high nitrogen reduction reaction activity and stability in producing ammonia. The catalyst, anchored on activated carbon, shows promising results for efficient electrosynthesis of ammonia.
A new telescope may be able to spot biosignatures on other planets in just three days, with six gas dwarf planets potentially harboring life. Researchers have calculated that the James Webb Space Telescope could detect ammonia around these planets after a few orbits.
Researchers have developed a zeolite-based nanocatalyst that achieves 2.5-times higher ammonia decomposition performance than conventional commercial catalysts while using only 40% of ruthenium metal. This new catalyst overcomes stability issues and enables large-capacity hydrogen transport via ammonia decomposition.
A research team at FAU has discovered that calcium can break the strong nitrogen bond at a temperature of minus 60°C. This finding could lead to simplified industrial processes for converting nitrogen into useful chemicals.
Researchers found a significant decrease in atmospheric ammonia concentrations during COVID-19 lockdowns in urban Beijing and rural Xianghe sites, contradicting previous assumptions about the major source of ammonia emissions.
Researchers at UNSW Sydney create a sustainable method for producing green ammonia from atmospheric nitrogen, reducing energy consumption and carbon emissions. The new technology has the potential to revolutionize agriculture and the global transition to a hydrogen economy.
A global collaboration aims to produce climate-neutral, green ammonia through new reaction technologies. The project will analyze and develop three scalable technologies for decentralized production.
Scientists have found a way to reduce ammonia synthesis temperatures using lanthanide oxyhydrides as a catalyst support for ruthenium. These materials enhance catalytic activity and stability, overcoming hydrogen poisoning issues.
Researchers at the Niels Bohr Institute designed a porous polymer capable of capturing small molecules, including toxic ammonia. The polymer's strong binding properties have significant implications for reducing environmental harm and improving human health.
Researchers from Aarhus University and Stanford University aim to create a sustainable technology for local-scale production of green ammonia. The project, called 'A new twist on ammonia production', seeks to improve the efficiency of electrochemical synthesis using 'designer' hydrogen-binding mediators.
A team of RUDN University biologists created a hibiscus-based dietary supplement for rainbow trout, reducing their sensitivity to ammonia pollution and improving stress resistance. The study found that the fish that received the supplement grew faster, had healthier livers, and stronger immune systems.
Researchers at the University of Illinois Chicago have identified a new method to produce ammonia with a significantly lower carbon footprint. The process uses a mesh screen coated in copper as a catalyst, which helps bind nitrogen to hydrogen to form ammonia.
Researchers at Kyoto University discovered a method to introduce defects into perovskite oxynitrides using strain, altering their physical properties. The approach could aid in developing photocatalysts.
Researchers at Northwestern University have developed a highly effective method for converting ammonia into hydrogen using renewable electricity. The new technique generates pure hydrogen that can be directly pressurized for storage, making it an ideal solution for the transportation sector.
Researchers have developed a graphdiyne-based metal atomic catalyst that achieves high selectivity and yield in ammonia synthesis. The catalyst, which exhibits determined electronic and chemical structure, demonstrated remarkable performance in converting nitrogen to ammonia at ambient temperatures and pressures.
Researchers uncover the production of nitric oxide by methane-eating microbes when they co-metabolize ammonia, a process previously thought to be toxic. This finding has significant implications for understanding the survival and growth of methanotrophs in environments with increasing fertilizer input.
Researchers discovered that water content and total mass concentration of aerosol particles are key factors in determining aerosol acidity. In populated continental areas with high anthropogenic emissions, the conjugate acid-base pair of ammonium ions and ammonia buffers and stabilizes aerosol pH.
Researchers from Xinjiang University developed a new core-shell nanocatalyst Au@CDs for enhanced visible-light photocatalytic nitrogen fixation, showing a 3.5-fold increase in activity compared to bare CDs.
Researchers at KIST developed a low-cost membrane material and catalyst to decompose ammonia into hydrogen and nitrogen, producing high-purity hydrogen. The new technology enables continuous production of pure hydrogen with reduced energy consumption and cost.
Scientists at Tokyo Institute of Technology have created a high-performing catalyst for ammonia synthesis using cerium nitride, leveraging the role of nitrogen vacancies. The new catalyst's performance is comparable to that of ruthenium-based ones, offering a potential eco-friendly alternative.
Scientists at Soochow University successfully alter the rate-determining step of electrochemical ammonia synthesis using cobalt single clusters, achieving outstanding yield rates and Faradaic efficiency. The new strategy reduces energy loss and cuts fundamental costs for sustainable NRR systems.
Researchers developed a new method for ammonia synthesis using nitrate contaminants as nitrogen source and water as hydrogen source. The electrocatalyst, Co/CoO nanosheet arrays, showed excellent performances with 93.8% of Faraday efficiency and 91.2% of selectivity.
Researchers at Stanford University have created a handheld, portable device to measure ammonia levels in blood. The device, which assesses ammonia levels from a finger or earlobe prick, can report results in less than a minute and is significantly more efficient than current methods.
Researchers at Tokyo Institute of Technology have developed a new strategy for producing ammonia using lanthanum and nickel as catalysts. The new catalyst relies on nitrogen vacancies to split N2 molecules into H2, which is then converted into NH3.
Researchers at USC Dornsife College of Letters, Arts and Sciences have successfully created metallic ammonia, allowing for a clearer understanding of the behavior of delocalized electrons. The study's findings open up new possibilities for synthesizing important organic compounds using this unique solution.