非常高效的催化臭氧化氨N到N2使用Co/Mg(OH)2作为催化剂
Tingting Cao1, Jingtian Xu1, Shaozhu Fu1
1Engineering Research Center of Low-Carbon Treatment and Green Development of Polluted Water in Northeast China, Ministry of Education, Northeast Normal University, Changchun 130117, China; Jilin Engineering Lab for Water Pollution Control and Resources Recovery, Northeast Normal University, Changchun 130117, China; School of Environment, Northeast Normal University, Changchun 130117, China.
一种新的/氧化催化剂通过臭氧化有效地从废水中去除氨和总. 这种催化剂即使在低温下也表现出高效率,尽管长期使用需要提高稳定性.
科学领域:
- 环境化学环境化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- 含有的废水给环境带来了重大挑战.
- 有效和选择性的臭氧化催化剂对于有效的去除至关重要.
- 现有的方法往往缺乏所需的效率和选择性.
研究的目的:
- 开发和描述一种新的Co/Mg(OH) 2纳米六角板催化剂,用于废水臭氧化.
- 评估催化剂在去除氨 (NH3-N) 和总 (TN) 的效率.
- 为了研究反应动力学,活性物种和催化剂的稳定性.
主要方法:
- 制备Co/Mg(OH)2催化剂,使用单热水法.
- 催化剂的全面结构和表面分析.
- 臭氧化实验以确定NH3-N和TN在各种条件下的去除效率,包括温度和pH值.
主要成果:
- 催化剂具有高的OSur/O比率,为41.06%.
- 最佳条件实现了90.26%的NH3-N和63.44%的TN去除,遵循伪第一阶动力学.
- 在4°C时观察到高去除效率 (95.49%NH3-N,65.61%TN);然而,催化剂稳定性受到三次循环后Mg2+损失的限制.
结论:
- Co/Mg(OH) 2催化剂对NH3-N和TN的去除是有效的,其中基基 (•OH) 是主要的活性物种.
- 可变价值的离子促进对气态产品的选择性.
- 需要进一步的研究,以提高催化剂的稳定性,以便在除中实际应用.
更多相关视频
08:13Chemical Precipitation Method for the Synthesis of Nb2O5 Modified Bulk Nickel Catalysts with High Specific Surface Area
Published on: February 19, 2018
12:08Catalytic Reactions at Amine-Stabilized and Ligand-Free Platinum Nanoparticles Supported on Titania During Hydrogenation of Alkenes and Aldehydes
Published on: June 24, 2022
相关概念视频
Catalysis
Preparation of Amines: Reduction of Oximes and Nitro Compounds
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,...
Amines to Alkenes: Cope Elimination
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Overview
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...
1° Amines to Diazonium or Aryldiazonium Salts: Diazotization with NaNO2 Mechanism
Oxidative Cleavage of Alkenes: Ozonolysis
Ozone is a symmetrical bent molecule stabilized by a resonance structure.
