Results 31 to 40 of about 1,157,388 (296)

De-oxygenation of CO2 by using Hydrogen, Carbon and Methane over Alumina-Supported Catalysts [PDF]

open access: yes, 2012
The de-oxygenation of CO2 was explored by using hydrogen, methane, carbon etc., over alumina supported catalysts. The alumina-supported ruthenium, rhodium, platinum, molybdenum, vanadium and magnesium catalysts were first reduced in hydrogen atmosphere ...
Raskar, R.Y., Kale, K.B., Gaikwad, A.G.
core   +2 more sources

Techno-economic analysis on recent heterogeneous catalysts for ammonia synthesis [PDF]

open access: yes, 2022
The economic performance of recently developed catalysts for ammonia synthesis, Ru/Ca(NH2)2 and Ru/Pr2O3, are evaluated by process simulation using ASPEN Plus.
Masaki, Yoshida   +2 more
core   +1 more source

Catalisadores heterogêneos para a produção de monoésteres graxos (biodiesel)

open access: yesQuímica Nova, 2011
The recent increase in the world biodiesel demand, along with the need to reduce costs while improving the environmental sustainability of the entire biodiesel production chain, have led to the search for heterogeneous catalysts that would be efficient ...
Claudiney Soares Cordeiro   +3 more
doaj   +1 more source

Advances in CaO-based catalysts for sustainable biodiesel synthesis

open access: yesGreen Energy and Resources, 2023
It is no longer unfamiliar to the world that usage of fossil-derived fuel is accompanied by several downsides, including environmental fatality associated with toxic gas emissions from diesel engines and the recurring surging price of diesel fuel.
Siri Fung Basumatary   +6 more
doaj   +1 more source

Nanostructured Heterogeneous Catalysts for Bioorthogonal Reactions

open access: yesAngewandte Chemie, 2023
AbstractBioorthogonal chemistry has inspired a new subarea of chemistry providing a powerful tool to perform novel biocompatible chemospecific reactions in living systems. Following the premise that they do not interfere with biological functions, bioorthogonal reactions are increasingly applied in biomedical research, particularly with respect to ...
Ana Sousa‐Castillo   +3 more
openaire   +3 more sources

Biodiesel production through the transesterification of waste cooking oil over typical heterogeneous base or acid catalysts [PDF]

open access: yes, 2023
For the production of biodiesel from waste cooking oil with an acid value of 1.86 mg KOH/g,fiveheterogeneous catalysts—Ba(OH)2, CaO, MgO, ZnO, and AlCl3—were employed.
Arachchige, Udara S. P. R.   +3 more
core   +1 more source

Titanium Dioxide as a Catalyst Support in Heterogeneous Catalysis

open access: yesThe Scientific World Journal, 2014
The lack of stability is a challenge for most heterogeneous catalysts. During operations, the agglomeration of particles may block the active sites of the catalyst, which is believed to contribute to its instability.
Samira Bagheri   +2 more
doaj   +1 more source

Valorization of CO2 through the Synthesis of Cyclic Carbonates Catalyzed by ZIFs

open access: yesMolecules, 2022
One way to exploit CO2 is to use it as a feedstock for the production of cyclic carbonates via its reaction with organic epoxides. As far as we know, there is still no heterogeneous catalyst that accelerates the reaction in a selective, efficient and ...
José J. Delgado-Marín   +5 more
doaj   +1 more source

Vanadia Promoted Co-AI20 3 Fischer-Tropsch Catalysts [PDF]

open access: yes, 2004
Bibliography: leaves 117-124.The primary aim of this work was to study systematically V20 5 promotion on yAI203 supported cobalt-based Fischer-Tropsch catalysts.
Zwane, Seneliso T
core   +1 more source

Reconstructing enzyme evolution by protein engineering

open access: yesFEBS Letters, EarlyView.
Natural enzyme evolution can be retraced by protein engineering methods such as directed evolution, rational design, and ancestral sequence reconstruction. These approaches reveal how enzymes emerged from ligand‐binding scaffolds, developed varying substrate preferences, formed oligomeric complexes, adapted to environmental changes, and evolved novel ...
Lukas Drexler   +2 more
wiley   +1 more source

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