Electrochemical ammonia synthesis from nitrite assisted by in-situ generated hydrogen atoms on nickel phosphide catalyst

2021 ◽  
Author(s):  
Xiao Yang ◽  
Lei Kang ◽  
Chuan-Jun Wang ◽  
Fulai Liu ◽  
Yong Chen
Keyword(s):  
Ammonia Synthesis ◽  
Effective Means ◽  
Alternative Strategy ◽  
Nickel Phosphide ◽  
Hydrogen Atoms ◽  
Feasible Alternative ◽  
Indirect Route

Exploring green and effective means for ammonia synthesis is an important but challenging task. EAS from indirect route (N2→NOx→NH3) provides a feasible alternative strategy. The key step in this route...

In-situ formed Co from Co-Mg-O solid solution synergizing with LiH for efficient ammonia synthesis

2021 ◽  
Author(s):  
Wenbo Gao ◽  
Sheng Feng ◽  
Hanxue Yan ◽  
Qianru Wang ◽  
Hua Xie ◽  
...  
Keyword(s):  
Solid Solution ◽  
Metal Nanoparticles ◽  
Magnesium Oxide ◽  
Ammonia Synthesis ◽  
Oxide Solid Solution ◽  
In Situ Formation

A cobalt magnesium oxide solid solution (Co-Mg-O) supported LiH catalyst has been synthesized, in which LiH functions both as a strong reductant for in-situ formation of Co metal nanoparticles and...

In-situ low temperature cleaning of silicon surfaces using hydrogen atoms

Vacuum ◽  
1995 ◽  
Vol 46 (7) ◽  
pp. 667-672 ◽  
Author(s):  
A Crossley ◽  
C.J. Sofield ◽  
S Sugden ◽  
R Clampitt ◽  
C Bradley
Keyword(s):  
Low Temperature ◽  
Silicon Surfaces ◽  
Hydrogen Atoms

Integrated mechanical, biological and physico-chemical treatment of liquid manure streams

2000 ◽  
Vol 41 (12) ◽  
pp. 175-182 ◽  
Author(s):  
S. Kalyuzhnyi ◽  
V. Sklyar ◽  
J. Rodriguez-Martinez ◽  
I. Archipchenko ◽  
I. Barboulina ◽  
...  
Keyword(s):  
Effective Means ◽  
Uasb Reactor ◽  
Pig Manure ◽  
First Year ◽  
Liquid Manure ◽  
Nitrogen And Phosphorus ◽  
Physico Chemical ◽  
Feasible Alternative ◽  
Reactor Operating ◽  
Nitrogen Elimination

The results obtained during the first year of execution of a joint Russian-Dutch project “The development of integrated anaerobic-aerobic treatment of liquid manure streams with maximisation of production of valuable by-products (fertilisers, biogas) and re-utilisation of water” (1999–2001) are discussed. The application of a straw filter was an effective means to separate the solid and liquid fractions of diluted pig manure wastewater and resulted in the removal of a significant part of the dry matter, total nitrogen and phosphorus (65, 27 and 32%, respectively). From the filtrate generated, 60–80 % of the COD was removed in a UASB reactor operating at 20–30°C. Up to 66% of phosphate was precipitated after air stripping of the CO2 from the anaerobic effluents. Ammonia was efficiently removed (>99%) from the anaerobic effluents using zeolite (Ural laumantite) as an ion exchanger. However, the N-content of the resulting zeolite was too low to be used as a fertiliser. A feasible alternative for nitrogen elimination involved nitrification of the anaerobic effluent followed by denitrification in a UASB reactor using the COD of the filtrated manure wastewater as carbon source.

scholarly journals CO2 Hydrogenation to Olefin-Rich Hydrocarbons Over Fe-Cu Bimetallic Catalysts: An Investigation of Fe-Cu Interaction and Surface Species

2021 ◽  
Vol 3 ◽  
Author(s):  
Wenjia Wang ◽  
Xiaoxing Wang ◽  
Guanghui Zhang ◽  
Ke Wang ◽  
Fu Zhang ◽  
...  
Keyword(s):  
Product Distribution ◽  
Distribution Analysis ◽  
Cu Alloy ◽  
Cu Catalyst ◽  
Reaction Performance ◽  
Cu Catalysts ◽  
Adsorbed Co ◽  
X Ray Absorption ◽  
Indirect Route

Previously, we reported a strong Fe-Cu synergy in CO2 hydrogenation to olefin-rich C2+ hydrocarbons over the γ-Al2O3 supported bimetallic Fe-Cu catalysts. In this work, we aimed to clarify such a synergy by investigating the catalyst structure, Fe-Cu interaction, and catalyst surface properties through a series of characterizations. H2-TPR results showed that the addition of Cu made both Fe and Cu easier to reduce via the strong interaction between Fe and Cu. It was further confirmed by X-ray absorption spectroscopy (XAS) and TEM, which showed the presence of metallic Fe and Fe-Cu alloy phases in the reduced Fe-Cu(0.17) catalyst induced by Cu addition. By correlating TPD results with the reaction performance, we found that the addition of Cu enhanced both the moderately and strongly adsorbed H2 and CO2 species, consequently enhanced CO2 conversion and C2+ selectivity. Adding K increased the adsorbed-CO2/adsorbed-H2 ratio by greatly enhancing the moderately and strongly adsorbed CO2 and slightly suppressing the moderately and strongly adsorbed H2, resulting in a significantly increased O/P ratio in the produced hydrocarbons. The product distribution analysis and in situ DRIFTS suggested that CO2 hydrogenation over the Fe-Cu catalyst involved both an indirect route with CO as the primary product and a direct route to higher hydrocarbons.

Sign in / Sign up

Export Citation Format

Share Document