Reactor Design, Modelling and Process Intensification for Ammonia Synthesis

2020 ◽  
pp. 17-48
Author(s):  
Ilenia Rossetti
Keyword(s):  
Ammonia Synthesis ◽  
Process Intensification ◽  
Reactor Design

Fractal Reactor in Micro-Scale for Process Intensification

2018 ◽  
Vol 17 (1) ◽  
Author(s):  
Yue Lu ◽  
Gang Wang ◽  
Zhuangdian Liang ◽  
Jian Sun ◽  
Yu Gu ◽  
...  
Keyword(s):  
Fractal Theory ◽  
High Surface ◽  
High Surface Area ◽  
Process Intensification ◽  
Volume Ratio ◽  
Reactor Design ◽  
Precise Control ◽  
Photocatalytic Reactions ◽  
Micro Reactors ◽  
Micro Reactor

AbstractFractal theory, with its novel architectures inspired by nature, provides some novel concepts for smart reactor design. Here, researches on the applications of fractal theory to micro-reactor design are reviewed, in term of its high surface area-to-volume ratio, rapid and direct numbering-up, safety, and precise control. In addition, two designs of fractal micro-reactor are introduced as typical examples. First, the H-type fractal structure is considered in the context of the design of a double-plate micro-reactor, which is used for photocatalytic reactions of CO2. Second, applications of fractal Hilbert curves are considered in the design of channel structures for gas-liquid reactions. These two fractal micro-reactors can be fabricated via 3D printing technology and used for CO2conversion under mild conditions.

Electron Donation by Low-Crystalline Ba-La-Ce Oxygen-Deficient Composite Oxide Accumulating on Ru Nanoparticles for Ammonia Synthesis under Mild Conditions

2019 ◽  
Author(s):  
Katsutoshi Sato ◽  
Shin-ichiro Miyahara ◽  
Yuta Ogura ◽  
Kotoko Tsujimaru ◽  
Yuichiro Wada ◽  
...  
Keyword(s):  
Ammonia Synthesis ◽  
Bond Cleavage ◽  
Synthesis Process ◽  
Strong Electron ◽  
Mild Conditions ◽  
Ru Nanoparticles ◽  
Rate Determining Step ◽  
Highly Active ◽  
Composite Oxides ◽  
Low Crystalline

<p>To mitigate global problems related to energy and global warming, it is helpful to develop an ammonia synthesis process using catalysts that are highly active under mild conditions. Here we show that the ammonia synthesis activity of Ru/Ba/LaCeO<i><sub>x</sub></i> pre-reduced at 700 °C is the highest reported among oxide-supported Ru catalysts. Our results indicate that low crystalline oxygen-deficient composite oxides, which include Ba<sup>2+</sup>, Ce<sup>3+</sup> and La<sup>3+</sup>, with strong electron-donating ability, accumulate on Ru particles and thus promote N≡N bond cleavage, which is the rate determining step for ammonia synthesis.</p>

Sign in / Sign up

Export Citation Format

Share Document