scispace - formally typeset
Search or ask a question

Is there any chances of ammonia converter catalyst dust reaching urea plant? 

Answers from top 10 papers

More filters
Papers (10)Insight
Our findings suggest that a significant portion of ammonia volatilized from top‐dressed urea might be captured by plant foliage.
Loss of N as ammonia (NH3) from surface-applied urea fertilizer may be high if hydrolysis takes place at the soil surface.
This suggests that urea amended with TSP and zeolite has a potential of reducing ammonia loss from surface-applied urea.
Thus, clay-intercalated urea as a fast effective fertilizer is expected to greatly contribute to mitigation of ammonia and N2O emissions along with green and sustainable crop production.
Ammonia loss from urea significantly hinders efficient use of urea in agriculture.
It is concluded that urea can be an effective source of ammonia for straw treatment by ensiling.
Urea, because of its cheap price and relatively low decomposition temperature (150degC ), represents an excellent direct source of ammonia.
Urea amended with TSP and zeolite has a potential of reducing ammonia loss from surface-applied urea.
Conditions do occur, however, in which the ammonia: urea ratio may be unusually high.
Ammonia volatilization from urea could be significantly minimized under waterlogged condition, if urea is amended with sago waste and zeolite.

Related Questions

Ammonia removal by plant powder4 answersThe invention provides various methods for removing ammonia. One method involves using plant extracts, such as eucalyptus citriodora oil, sanguisorba officinalis extract, crape myrtle extract, and rose extract, which continuously release fresh fragrance and have the effects of killing viruses and insects. Another method utilizes acid-base neutralization to remove free ammonia in urea powder, while also adding nutrient elements necessary for crop growth. A gradient fluidized ammonia circulating explosion method is used to remove crystallization of plant stalks, where straws are ground, presoaked, and then subjected to ammonia fluidization and steam heating. Activated carbon or zeolite can be used as solid adsorbents to physically adsorb ammonia from the off-gas of a urea production plant, which can then be regenerated and reused. Additionally, an ammonia-nitrogen remover comprising aluminum sulfate, carboxymethylcellulose sodium, potassium phosphate, diatomite, hydroxypropyl acrylate, trimethylol propane, magnesium phosphate, and active carbon powder can be used to remove ammonia-nitrogen from sewage.
How do ammonia slip catalysts work?3 answersAmmonia slip catalysts (ASC) are used downstream of NH3-selective catalytic NOx reduction (SCR) systems to minimize ammonia slip from transport sector SCR units. ASCs can consist of an SCR active layer for NOx control, a layer with oxidation functionality for ammonia conversion, or a combination of both. Mathematical models of ASCs involve flow and mass transfer in the monolithic channels as well as coupled reaction/diffusion processes in the catalytic layers. The best ASC configurations feature fast diffusion in the catalytic layers, a thin top layer loading with some ammonia oxidation catalyst, and a mixed layer of ammonia oxidation catalyst and the SCR catalyst to limit the formation of N2O and NOx. ASCs work by converting ammonia into harmless nitrogen and water through oxidation reactions, preventing it from being released into the environment as a pollutant.
Can urea be efficiently converted to hydrogen using non-noble metals?3 answersUrea can be efficiently converted to hydrogen using non-noble metals. Non-noble metal catalysts such as nickel, cobalt, molybdenum, manganese, iron, and copper have been found to play an essential role in reducing costs and increasing the efficiency of urea electrolysis. Studies have shown that multilayered nickel and copper phosphides/phosphates supported on Ni foam exhibit significant catalytic activity and stability in the urea oxidation reaction (UOR) and the hydrogen evolution reaction (HER). Additionally, novel NiMo-based nanorods have been reported as excellent catalysts for both the UOR and HER, outperforming most recently reported non-noble metal catalysts. Trimetallic nickel vanadium manganese nitride porous microspheres have also been developed as efficient bifunctional electrocatalysts for both UOR and HER, offering considerable energy-saving phenomena. These findings suggest that non-noble metal catalysts can effectively convert urea to hydrogen, providing a more economic and sustainable approach to hydrogen production.
Ammonia production from biodiesel chemical reaction5 answersAmmonia production from biodiesel involves the injection of ammonia into the intake manifold of a diesel engine, followed by the spraying of a pilot dose of biodiesel into the cylinder to initiate combustion of the premixed ammonia-air mixture. The effects of different ammonia mass flow rates with a constant biodiesel dose on engine performance and emissions were investigated. The results showed that a significant portion of the biodiesel input energy can be replaced by ammonia, but increasing the ammonia mass flow rate slightly decreases the brake thermal efficiency. However, increasing the ammonia load contribution significantly reduces the emissions of CO2, CO, and HC, but increases the emission of NO. The combustion duration of biodiesel/ammonia is shorter compared to only biodiesel operation, as most of the heat is released during the premixed combustion phase.
Is catalytic converters needed for nuclear power plants?10 answers
What is the typical life of ammonia synthesis converter catalyst?10 answers

See what other people are reading

How does the use of wastewater for algae growth impact the quality of the wastewater?
5 answers
The utilization of wastewater for algae growth has a significant impact on improving the quality of the wastewater. Algae play a crucial role in wastewater treatment by efficiently removing nutrients like nitrogen and phosphorus, heavy metals, and organic contaminants, thereby enhancing the water quality. Algal cultivation in wastewater not only helps in the biological removal of pollutants but also contributes to the oxygenation of the water, creating a more eco-friendly and cost-effective approach to wastewater treatment. Additionally, the use of algae in wastewater treatment aids in reducing the levels of Chemical Oxygen Demand (COD) and Biological Oxygen Demand (BOD), which are key indicators of water quality, leading to a substantial improvement in the overall wastewater quality. Algae's ability to utilize inorganic nutrients for growth results in the production of valuable biomass that can be utilized for various applications, further highlighting the positive impact of algae on wastewater quality.
What is the relationship between W0 and Diameter of the water pool in AOT/isooctane/water reverse micelle?
4 answers
The relationship between W0 (water to AOT molar ratio) and the diameter of the water pool in AOT/isooctane/water reverse micelles is crucial. Studies have shown that as the W0 value increases, the size of the water pool within the reverse micelles also increases. Specifically, at higher W0 values, the reverse micellar pool size expands, as evidenced by dynamic light scattering measurements. Additionally, the refractive index method has been utilized to determine the refractive indices of micellar water and interfacial water, providing insights into the structural parameters of the reverse micelles at different W0 values. These findings highlight the direct correlation between W0 and the diameter of the water pool in AOT/isooctane/water reverse micelles, emphasizing the importance of water loading ratios in influencing the size of confined water spaces within the micellar structures.
What is the quantitative relationship between W0 and Diameter of the water pool in AOT/isooctane/water reverse micelle?
5 answers
The quantitative relationship between the water to AOT molar ratio (W0) and the diameter of the water pool in AOT/isooctane/water reverse micelles has been extensively studied. Research has shown that the size of the "core water" region resembling bulk water decreases with increasing W0 values. Additionally, the refractive index method has been utilized to determine the average aggregation number and the area per surfactant headgroup in reverse micelles for different W0 values, showing good agreement with other experimental methods like NMR and small angle X-ray scattering. Furthermore, the behavior of water movement between small and large reverse micelles in systems with different W0 values has been investigated through molecular dynamics simulations, highlighting the impact of electrostatics and dielectric effects on the equilibrium size distribution of reverse micelles.
What is the role industrial maritime ports and green hydrogen supply chain ?
5 answers
Industrial maritime ports play a crucial role in the transition towards greener practices in the shipping industry. They are key players in the adoption of green supply chain management (GSCM) initiatives, which involve integrating environmental concerns into supply chain practices. Green ports aim to minimize fossil fuel consumption, promote environmentally friendly operations, and enhance economic sustainability through the use of alternative energy sources and technologies. Additionally, the maritime sector, including ports, is identified as a significant contributor to global emissions, making it a focal point for decarbonization efforts. Green hydrogen emerges as a promising solution for maritime decarbonization, with studies highlighting its potential to reduce emissions significantly when produced using renewable energy sources. Therefore, industrial maritime ports are pivotal in facilitating the development and implementation of green hydrogen supply chains to achieve sustainable and environmentally friendly maritime operations.
Is Ulva lactuta capable of promoting bioremediation?
4 answers
Yes, Ulva lactuca has demonstrated significant capabilities in promoting bioremediation across various studies. Its effectiveness in heavy metal uptake from environments like the Marchica lagoon, where it showed a strong affinity for bioaccumulating metals such as Iron (Fe), Manganese (Mn), and Lead (Pb), indicates its potential in mitigating pollution from heavy metals. Additionally, Ulva lactuca plays a crucial role in nitrogen removal in integrated multi-trophic aquaculture (IMTA) systems, enhancing the nitrogen cycle and improving water quality by affecting the structure of bacterial communities and the abundance of nitrogen cycle functional genes. The alga's bioaccumulation of phthalic acid esters (PAEs), with efficient uptake and photodegradation capabilities, further underscores its utility in environmental bioremediation, particularly in mitigating pollution from ubiquitous pollutants. Its growth and nutrient removal rates when exposed to varying concentrations of nitrogen and phosphorus in recirculating IMTA systems with fish and seaweed highlight its adaptability and efficiency in utilizing nutrients for biomass production, thus reducing potential eutrophication. Ulva lactuca's integration into bio-composites for the removal of Cd(II) ions showcases its application in removing toxic metals from aqueous solutions, offering a sustainable approach to water purification. Its role as a functional food ingredient and water bioremediation agent in shrimp aquaculture further demonstrates its dual benefits in promoting aquaculture sustainability and environmental health. The growth-promoting effects of bacteria associated with Ulva clathrata, a closely related species, suggest the potential for synergistic applications in bioremediation and aquaculture. In wastewater bioremediation within IMTA systems, Ulva lactuca has shown high ecosystem capacity for nutrient uptake and oxygen production, contributing to the balance and efficiency of aquaculture systems. Its bioremediation capacities for removing dissolved nutrients in cold-seawater ecosystems further highlight its versatility and effectiveness across different environmental conditions. Lastly, experimental feeding trials with shrimp culture have indicated that Ulva lactuca can be effectively used for wastewater bioremediation and as a nutritious feed additive, enhancing growth and feed conversion rates in shrimp. Collectively, these studies affirm Ulva lactuca's capability in promoting bioremediation across a spectrum of pollutants and environmental settings.
What is the nutritional value of rabbit viscera?
5 answers
The rabbit viscera, particularly the liver and portal-drained viscera, play a crucial role in nutrient metabolism and energy utilization. These tissues significantly impact the heat increment of feeding, nutrient absorption, and partitioning in ruminants. They are involved in the oxidation and transformation of absorbed nutrients, such as volatile fatty acids and amino acids, influencing the availability of nutrients for peripheral tissues. Additionally, the liver converts absorbed ammonia to urea and supports glucose and protein synthesis, affecting nutrient utilization. Furthermore, the portal-drained viscera and liver regulate insulin and glucagon release, influencing nutrient partitioning in peripheral tissues. Understanding the metabolic functions of rabbit viscera is essential for optimizing nutrient utilization and overall health in rabbit production systems.
Does a deficiency of molybdenum in plants lead to the development of perforated leaves?
4 answers
Molybdenum deficiency in plants does not directly lead to the development of perforated leaves. Instead, molybdenum deficiency manifests as symptoms like interveinal chlorosis, slow plant growth, and low chlorophyll content. Molybdenum plays a crucial role in nitrogen metabolism, enzyme synthesis, and stress adaptation in plants. Studies on wheat have shown that molybdenum accumulation increases under nitrogen deficiency, enhancing nitrogen use efficiency without causing perforated leaves. Additionally, molybdenum deficiency affects the activities of key enzymes like nitrate reductase and xanthine dehydrogenase, impacting plant growth and development. Therefore, while molybdenum deficiency can have detrimental effects on plant health, it does not directly result in the development of perforated leaves.
How denitrifying bacteria produce biomass under aerobic conditions through which metabolism?
5 answers
Denitrifying bacteria produce biomass under aerobic conditions through various metabolic pathways involving denitrification processes. Different strains like Bacillus subtilis JD-014, Pseudomonas stutzeri strain D1, Methylophaga nitratireducenticrescens JAM1, and mixed consortia of bacteria exhibit efficient denitrification capabilities under aerobic conditions. These bacteria utilize nitrate, nitrite, and ammonium sources for biomass production, showcasing their ability to remove nitrogen compounds from the environment while generating biomass. The metabolic relationships between nitrate removal, aerobic respiration, and denitrification are crucial for understanding how these bacteria thrive and produce biomass in oxygen-rich environments, highlighting the importance of these microbial processes in environmental remediation and bioenergy applications. Additionally, the presence of specific genes encoding nitrate reductases, nitric oxide reductases, and nitrous oxide reductases in these bacteria further elucidates their metabolic pathways for biomass production under aerobic conditions.
How does climate change impact maize in northern Nigeria?
5 answers
Climate change significantly impacts maize production in northern Nigeria. Studies show that poor soil fertility and climate variability are major constraints to maize production. The prevalence of armyworm infestations, driven by climate change, has become a major biotic constraint affecting maize cultivation. Climate adaptation strategies, such as crop rotation and row planting, have been identified as essential for enhancing maize output and technical efficiency in the face of changing climatic conditions. Additionally, the growth rates and prices of maize have been influenced by climate change, with potential stagnation in production growth rates and increased prices due to environmental factors. Farmers in maize-producing areas of northern Nigeria perceive climate change accurately, with significant differences in perception between farmers and non-farmers, emphasizing the need for targeted policies to mitigate climate change impacts on maize yields.
How does molybdenum deficiency in plants affect the growth and development of leaf blades?
5 answers
Molybdenum deficiency in plants significantly impacts the growth and development of leaf blades. The deficiency leads to symptoms like slow plant growth, reduced chlorophyll content, and lower ascorbic acid capacity. Additionally, molybdenum plays a crucial role in nitrogen metabolism and the biosynthesis of plant hormones, such as abscisic acid and auxins. Studies on wheat have shown that under nitrogen deficiency, molybdenum accumulation in leaves increases, affecting nitrogen translocation within the plant. Furthermore, molybdenum deficiency symptoms include interveinal chlorosis in young and middle leaves, impacting total dry matter, seed yield, and seed protein content. Overall, molybdenum deficiency disrupts essential metabolic processes, leading to impaired growth and development of leaf blades in plants.
What are the effects of synthetic fertilizers on soil quality and plant growth?
5 answers
The use of synthetic fertilizers has both positive and negative effects on soil quality and plant growth. Synthetic fertilizers provide an immediate boost to plant growth by supplying essential nutrients. However, their overuse can lead to soil hardening, decreased fertility, and environmental pollution, affecting soil health and plant growth negatively. Additionally, excessive use of synthetic fertilizers can result in health hazards for humans, such as hemoglobin disorders and Alzheimer's disease, due to high levels of nitrates and nitrites in the fertilizers. On the other hand, sustainable farming practices that incorporate organic materials and bio-organic mineral fertilizers can help reduce the detrimental effects of synthetic fertilizers, maintain soil fertility, and promote microbial diversity in the rhizosphere, ultimately benefiting agricultural productivity.