Listar por tema "carbon dioxide"
Mostrando ítems 1-10 de 10
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Active biopolymers in green non-conventional media: a sustainable tool for developing clean chemical processes
Royal Society of Chemistry (2015-10-15)The greenness of chemical processes turns around two main axes: the selectivity of catalytic transformations, and the separation of pure products. The transfer of the exquisite catalytic efficiency shown by enzymes in ... -
An artificial leaf device built with earth-abundant materials for combined H-2 production and storage as formate with efficiency > 10%
Royal Society of Chemistry (2023-02-15)A major challenge for achieving energy transition and transforming the current energy model into distributed production is the development of efficient artificial leaf-type devices capable of directly converting carbon ... -
Basically, nucleophilicity matters little: towards unravelling the supramolecular driving forces in enzyme-like CO2 conversion
Royal Society of Chemistry (2022-08-03)The reaction mechanism for the cycloaddition of CO2 to styrene oxide in the presence of macrocyclic pseudopeptides has been studied using DFT methods. Computational calculations indicate that the unprecedented catalytic ... -
Catalyst design for highly efficient carbon dioxide hydrogenation to formic acid under buffering conditions
Elsevier (2020-03-19)We report on new ruthenium complexes as catalysts for the efficient transformation of CO2 into formic acid employing basic ionic liquids as buffering media. Remarkably, these complexes catalyze the hydrogenation of CO2 ... -
Direct Air Capture and Integrated Conversion of Carbon Dioxide into Cyclic Carbonates with Basic Organic Salts
American Chemical Society (2023-07-03)Direct air capture and integrated conversion is a very attractive strategy to reduce CO2 concentration in the atmosphere. However, the existing capturing processes are technologically challenging due to the costs of the ... -
Experimental determination of the optimum intermediate and gas-cooler pressures of a commercial transcritical CO2 refrigeration plant with parallel compression
Elsevier (2021-05-05)CO2 systems used in refrigeration are becoming more complex with the aim of improving their energy performance. Parallel compression is one of the implemented solutions to enhance the performance of the plants. However, ... -
Experimental evaluation of a R134a/CO2 cascade refrigeration plant
Elsevier (2014)We present the experimental evaluation of a R134a/CO2 cascade refrigeration plant designed for low evaporation temperature in commercial refrigeration applications. The test bench incorporates two single- stage vapour ... -
Experimental evaluation of alternative CO2-based blends for transcritical refrigeration systems
International Institute of Refrigeration (IIR) (2023-08-21)This work presents two refrigerant CO2 blends with R32 and R1270 designed with a theoretically nonflammability and a GWP below 150. Both mixtures were tested in a small-capacity vapour compression system with and without ... -
Experimental validation and development of an advanced computational model of a transcritical carbon dioxide vapour compression cycle with a thermoelectric subcooling system
Elsevier Ltd. (2022-01-23)The inclusion of a thermoelectric subcooler as an alternative to increment the performance of a vapour compression cycle has been proved promising when properly designed and operated for low-medium power units. In this ... -
Vapour compression and caloric refrigeration in combination for a new hybrid refrigeration system
International Institute of Refrigeration (IIR) (2023-08-21)Although caloric refrigeration systems, such as magnetic and elastocaloric ones have shown promising potential in the last decade, their application in stand-alone applications remains scarce. Namely, they can provide ...