scholarly journals Utilization of spent iron catalyst for ammonia synthesis

2007 ◽  
Vol 9 (3) ◽  
pp. 108-113 ◽  
Author(s):  
Walerian Arabczyk ◽  
Urszula Narkiewicz ◽  
Zofia Lendzion-Bieluń ◽  
Dariusz Moszyński ◽  
Iwona Pełech ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Material ◽  
Ammonia Synthesis ◽  
Iron Catalyst ◽  
Iron Nitrides ◽  
Direct Oxidation ◽  
Preparation Methods ◽  
Decomposition Of Hydrocarbons

Utilization of spent iron catalyst for ammonia synthesis Several methods of the utilization of spent iron catalyst for ammonia synthesis have been presented. The formation of iron nitrides of different stoichiometry by direct nitriding in ammonia in the range of temperatures between 350°C and 450°C has been shown. The preparation methods of carbon nanotubes and nanofibers where iron catalyst catalyse the decomposition of hydrocarbons have been described. The formation of magnetite embedded in a carbon material by direct oxidation of carburized iron catalyst has been also presented.

scholarly journals Porphyrin MOF-Derived Porous Carbons: Preparation and Applications

2021 ◽  
Vol 7 (2) ◽  
pp. 47
Author(s):  
Flávio Figueira ◽  
Filipe A. Almeida Paz
Keyword(s):  
Chemical Composition ◽  
Carbon Material ◽  
Metal Organic Frameworks ◽  
Electrochemical Reactions ◽  
Porous Carbon Material ◽  
Important Class ◽  
Porous Carbons ◽  
Preparation Methods ◽  
Crystalline Materials ◽  
Metal Organic

Metal–organic frameworks (MOFs) are crystalline materials with permanent porosity, composed of metal nodes and organic linkers whose well-ordered arrangement enables them to act as ideal templates to produce materials with a uniform distribution of heteroatom and metal elements. The hybrid nature of MOFs, well-defined pore structure, large surface area and tunable chemical composition of their precursors, led to the preparation of various MOF-derived porous carbons with controlled structures and compositions bearing some of the unique structural properties of the parent networks. In this regard, an important class of MOFs constructed with porphyrin ligands were described, playing significant roles in the metal distribution within the porous carbon material. The most striking early achievements using porphyrin-based MOF porous carbons are here summarized, including preparation methods and their transformation into materials for electrochemical reactions.

scholarly journals Experimental and DFT studies of carbon nanotubes covalently functionalized with an imidazole derivative for electrochemical stability and green corrosion inhibition as a barrier layer on the nickel alloy surface in a sulphuric acidic medium

RSC Advances ◽  
2019 ◽  
Vol 9 (66) ◽  
pp. 38677-38686
Author(s):  
Palaniappan N. ◽  
I. S. Cole ◽  
A. E. Kuznetsov ◽  
K. R. Justin Thomas
Keyword(s):  
Carbon Nanotubes ◽  
Nickel Alloy ◽  
Electrostatic Interaction ◽  
Barrier Layer ◽  
Carbon Material ◽  
Acidic Medium ◽  
Electrochemical Stability ◽  
Alloy Surface ◽  
Nickel Surface ◽  
Dft Studies

(A) The electrostatic interaction of a functionalized carbon material with a 111 nickel surface, (B) the OPT structure of 4,5-DPM + CNT, and (C) 4,5-DPIM + CNT material chemisorbed on a 111 nickel alloy surface.

Iron catalyst for ammonia synthesis doped with lithium oxide

2009 ◽  
Vol 10 (14) ◽  
pp. 1821-1823 ◽  
Author(s):  
Walerian Arabczyk ◽  
Izabella Jasinska ◽  
Roman Jedrzejewski
Keyword(s):  
Ammonia Synthesis ◽  
Iron Catalyst ◽  
Lithium Oxide

Control of the outer diameter of thin carbon nanotubes synthesized by catalytic decomposition of hydrocarbons

2000 ◽  
Vol 317 (1-2) ◽  
pp. 71-76 ◽  
Author(s):  
I Willems ◽  
Z Kónya ◽  
J.-F Colomer ◽  
G Van Tendeloo ◽  
N Nagaraju ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Catalytic Decomposition ◽  
Outer Diameter ◽  
Thin Carbon ◽  
Decomposition Of Hydrocarbons

Kinetics of reduction of an iron catalyst for ammonia synthesis

1980 ◽  
Vol 15 (2) ◽  
pp. 285-291 ◽  
Author(s):  
A. Baranski ◽  
J. M. Lagan ◽  
A. Pattek ◽  
A. Reizer
Keyword(s):  
Ammonia Synthesis ◽  
Iron Catalyst ◽  
Kinetics Of ◽  
Kinetics Of Reduction

A Comparison of Different Preparation Methods of Fe-Mo-Mg-O Catalyst for the Large-Scale Synthesis of Carbon Nanotubes

2006 ◽  
Vol 510-511 ◽  
pp. 66-69 ◽  
Author(s):  
Yan Fang Chen ◽  
Yun Soo Lim
Keyword(s):  
Carbon Nanotubes ◽  
Large Scale ◽  
Sol Gel ◽  
High Yield ◽  
Preparation Methods ◽  
Gel Method ◽  
Sol Gel Method ◽  
Large Scale Synthesis ◽  
Synthesis Of Carbon Nanotubes ◽  
Reaction Routes

Carbon nanotubes (CNTs) in a high yield were synthesized by the decomposition of the methane gas with CCVD, in which two different reaction routes of sol-gel method prepared Fe-Mo- Mg-O catalyst. The two different routs influenced the wall number and defects of CNTs and the formation of CNTs. The concentration of Mo in the catalyst played a very important role in the yield of CNTs.

Sign in / Sign up

Export Citation Format

Share Document