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Related Concept Videos

Overview of Nitrogen Metabolism01:20

Overview of Nitrogen Metabolism

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Nitrogen is a very important element for life because it is a major constituent of proteins and nucleic acids. It is a macronutrient, and in nature, it is recycled from organic compounds and stored in the form of  ammonia, ammonium ions, nitrate, nitrite, or  nitrogen gas by many metabolic processes. Many of these metabolic processes are carried out only by prokaryotes.
The largest pool of nitrogen available in the terrestrial ecosystem is gaseous nitrogen (N2) from the air, but this...
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Preparation of Amines: Reduction of Oximes and Nitro Compounds01:29

Preparation of Amines: Reduction of Oximes and Nitro Compounds

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Oximes can be reduced to primary amines using catalytic hydrogenation, hydride reduction, or sodium metal reduction. The reduction of aliphatic and aromatic nitro compounds to primary amines takes place by either catalytic hydrogenation or by using active metals like Fe, Zn, and Sn in the presence of an acid.
Though catalytic hydrogenation can reduce nitrobenzenes, the reduction is nonselective in the presence of other functional groups. For instance, if nitrobenzene contains an aldehyde group,...
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Nitriles to Carboxylic Acids: Hydrolysis01:08

Nitriles to Carboxylic Acids: Hydrolysis

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Nitriles undergo acid-catalyzed hydrolysis or base-catalyzed hydrolysis to form a carboxylic acid. These reactions proceed via an amide intermediate.
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1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview01:26

1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview

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Nitrous acid and nitric acids are two types of acids containing nitrogen, among which nitrous acid is weaker than nitric acid. Nitrous acid with a pKa value of 3.37 ionizes in water to give a nitrite ion and the hydronium ion.
The nitrous acid is unstable. Hence, it is formed in situ from a solution of sodium nitrite and cold aqueous acids such as hydrochloric or sulfuric acid. In an acidic solution, the –OH group of nitrous acid undergoes protonation to give oxonium ion, followed by...
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Preparation of Nitriles01:12

Preparation of Nitriles

2.0K
One of the common methods to prepare nitriles is the dehydration of amides. This method requires strong dehydrating agents like phosphorous pentoxide or boiling acetic anhydride for converting amides to nitriles. Another reagent namely, thionyl chloride also accomplishes the dehydration of amides, where amide acts as a nucleophile. The first step of the mechanism involves the nucleophilic attack by the amide on the thionyl chloride to form an intermediate. In the next step, the electron pairs...
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Catalysis02:50

Catalysis

26.8K
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
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Estimating Sediment Denitrification Rates Using Cores and N2O Microsensors
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Estimating Sediment Denitrification Rates Using Cores and N2O Microsensors

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Progress and challenges in nitrous oxide decomposition and valorization.

Xuanhao Wu1, Jiaxin Du1, Yanxia Gao1

  • 1Department of Environmental Engineering, Zhejiang University, China Zhejiang Provincial Engineering Research Center of Industrial Boiler & Furnace Flue Gas Pollution Control, Hangzhou, 310058, China. zbwu@zju.edu.cn.

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This summary is machine-generated.

Nitrous oxide (N2O) decomposition is key for climate and ozone protection. This review details advanced catalysts and methods for N2O reduction and potential resource reuse, aiding emission control efforts.

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Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O
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Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O

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Supercritical Nitrogen Processing for the Purification of Reactive Porous Materials
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Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O
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Measurement of the Potential Rates of Dissimilatory Nitrate Reduction to Ammonium Based on 14NH4+/15NH4+ Analyses via Sequential Conversion to N2O

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Supercritical Nitrogen Processing for the Purification of Reactive Porous Materials
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Supercritical Nitrogen Processing for the Purification of Reactive Porous Materials

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Area of Science:

  • Environmental Science
  • Catalysis
  • Green Chemistry

Background:

  • Nitrous oxide (N2O) is a potent greenhouse gas and ozone-depleting substance.
  • Mitigating N2O emissions aligns with UN Sustainable Development Goals and carbon neutrality targets.
  • Existing N2O treatment technologies require comprehensive evaluation and comparison.

Purpose of the Study:

  • To provide a holistic review of N2O decomposition technologies.
  • To assess novel catalysts and pathways for efficient N2O reduction.
  • To explore N2O valorization and resource reuse opportunities.

Main Methods:

  • Summarizing recent advancements in thermal decomposition.
  • Evaluating direct catalytic decomposition (deN2O) and selective catalytic reduction.
  • Analyzing emerging catalysts like nanostructured and single-atom materials.
  • Detailing room-temperature techniques: photocatalytic and electrocatalytic N2O reduction.

Main Results:

  • Progress in thermal, direct catalytic, and selective catalytic reduction of N2O is updated.
  • Emerging catalysts show promising activity for N2O decomposition.
  • Low-energy photocatalytic and electrocatalytic methods offer sustainable N2O reduction pathways.
  • N2O utilization in chemical synthesis presents avenues for resource reuse.

Conclusions:

  • A comprehensive understanding of N2O treatment technologies is crucial for emission control.
  • Novel catalysts and room-temperature methods enhance efficiency and sustainability.
  • Valorization of N2O offers potential for resource recovery and circular economy principles.