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首页> 外文期刊>Catalysis science & technology >Catalytic conversion to ammonia through solid-state nitrate as a proposal for the emerging usage of nitrogen oxides
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Catalytic conversion to ammonia through solid-state nitrate as a proposal for the emerging usage of nitrogen oxides

机译：通过固态硝酸盐催化转化为氨，作为氮氧化物新兴用途的建议

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摘要

Nitrogen oxides, NOx, that arise anthropogenically from combustion at high temperature using air are serious byproducts that cause air pollution. Here, we propose a catalytic conversion system by alternate switching of inlet gas from NOx containing O2-rich combustion gas (e.g., 1000 ppm NO + 10% O2) to NO/ O2-free reduction one (e.g., 1% H2). According to this gas-switching operation, solid-state nitrate, stored with alkali earth metal species, was converted to gaseous NH3 under ambient pressure, which would possibly be useful for solving the nitrogen crisis as well as constructing a new industrial structure of a circular nitrogen economy. Large Pt nanoparticles inside mesoporous alumina particles, created by an aerosol-assisted one-pot synthesis with Pt sources followed by calcination at high temperature (e.g., 850 °C), were helpful for shifting the efficient-working temperature to a higher region. A Ba/Pt@mAl2O3(γ) type nanocomposite catalyst worked very well at 250 °C and higher. Selectivity for NH3 reached 90%, and was also achieved using Ca/Pt@mAl2O3(γ), without a high-energy process like the cleavage of N2.
机译：氧化氮,氮氧化合物,anthropogenically出现在高温燃烧用空气导致空气污染严重的副产品。在这里,我们提出一个催化转换系统交替切换入口气体氮氧化物包含O2-rich燃烧气体(例如,1000 ppm没有+ 10% O2) / O2-free减少(例如,1% H2)。操作,固体硝酸、存储碱土金属物种,被转换为气态氨在环境压力下,对于解决氮可能有用危机以及构建一个新产业氮循环经济的结构。Pt纳米粒子在介孔氧化铝粒子,由一个aerosol-assisted锅其次是煅烧合成与Pt来源在高温下(例如,850°C),是有帮助的将有效工作温度更高的地区。纳米催化剂在250°C。工作很好甚至更高。也通过使用Ca / Pt@mAl2O3(γ),没有这样的高能过程N2的乳沟。

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