Nitrification is the biological oxidation of ammonia to nitrate via the intermediary nitrite. Nitrification is an important step in the nitrogen cycle in soil. The process of complete nitrification may occur through separate organisms [1] or entirely within one organism, as in comammox bacteria.

2018年3月13日 · Ammonia oxidation is a fundamental core process in the global biogeochemical nitrogen cycle. Oxidation of ammonia (NH 3) to nitrite (NO 2 −) is the first and rate-limiting step in nitrification and is carried out by distinct groups of microorganisms.

2020年9月25日 · Oxidation of ammonia by molecular complexes is a burgeoning area of research, with critical scientific challenges that must be addressed. A fundamental understanding of individual reaction steps is needed, particularly …

2023年2月17日 · It involves the biological oxidation of ammonia (NH 3) or ammonium (NH 4 +) to nitrite (NO 2 –) and then from nitrite (NO 2 –) to nitrate (NO 3 –). Thus it involves two steps, as shown below.

Now the oxidation of ammonia to form NO with about 95% selectivity results in a temperature rise of some 70% per 1% ammonia oxidized in the absence of heat losses from the gas mixture.

2023年7月14日 · Ammonia oxidising archaea are among the most abundant living organisms on Earth and key microbial players in the global nitrogen cycle. They carry out oxidation of ammonia to nitrite, and their...

2018年7月7日 · This work introduces a newly developed reaction mechanism for the oxidation of ammonia in freely propagating and burner-stabilized premixed flames as well as shock-tube, jet-stirred reactor, and plug-flow reactor experiments. The paper mainly focuses on pure ammonia and ammonia–hydrogen fuel blends.

2024年11月23日 · Nitrification is the net result of two distinct processes: oxidation of ammonium to nitrite (NO 2−) by nitrosifying or ammonia-oxidizing bacteria and oxidation of nitrite (NO 2−) to nitrate (NO 3−) by the nitrite-oxidizing bacteria. Nitrification …

2024年11月1日 · Ammonia oxidation is an alternative to endothermic pyrolysis (i.e., cracking) and allows releasing the maximum calorific value of fuels as energy during combustion.

2021年10月27日 · The electrocatalyzed ammonia oxidation reaction (AOR) is a potential pathway toward waste ammonia remediation, energy generation, and the synthesis of value-added products. To date, mechanistic studies have focused on elucidating the progress of AOR on Pt-based catalysts with an established pathway for N 2 $\mathrm{N_2}$ only.