Economía Circular

Economía Circular

CO2 hydrogenation: Selectivity control of CO versus CH4 achieved using Na doping over Ru/m-ZrO2 at low pressure
- By doping 1%Ru/m-ZrO2 with sodium, selectivity tuning between CO and CH4 during CO2 hydrogenation was achieved by controlling the relative rates of reverse water-gas shift and CO methanation. By...
Layered double hydroxides derived 3D flower-like FeNi@C microspheres as lightweight and high-efficient electromagnetic wave absorber
- Layered double hydroxides (LDH) are employed as a promising template to prepare magnetic polymetallic alloys with hierarchical or hollow structure, being regarded as the promising candidates for...
Microstructure and mechanical properties of Mg–GdH2 composite prepared by internal hydrogenation
23/05/2022 - Abstract In this study, Mg–GdH2 composite was prepared by internal hydrogenation treatment (IHT) of Mg–5Gd (wt%) alloy at 300 and 325 °C for 36 and 48 h under hydrogen...
In situ modulated photoluminescence study of the hydrogenation processes of tunnel oxide passivating contacts during plasma processes
23/05/2022 - To go further than a step?by?step optimization of plasma processes, in situ modulated photoluminescence allows to measure in real time the minority carrier lifetime of a sample. Such measurements...
Chemical recycling of waste polystyrene by thermo-catalytic pyrolysis: A description for different feedstocks, catalysts and operation modes
01/07/2022 - Chemical recycling by thermo-catalytic pyrolysis/degradation offers the possibility of converting waste plastics into their original monomers or other valuable chemicals which can be used as...
Synergetic effect of Cu0 ?Cu+ derived from layered double hydroxides toward catalytic transfer hydrogenation reaction
- As a safe and environmentally friendly selective hydrogenation method, catalytic transfer hydrogenation (CTH) has aroused great interest in preparation of high-value-added products from biomass...
Iron single atoms and clusters anchored on natural N-doped nanocarbon with dual reaction sites as superior Fenton-like catalysts
- Ultra-small metal clusters have emerged as one of the most promising alternatives to heterogeneous Fenton-like catalysts. Despite the high atom utilization and structural stability of catalysts...
Bioaccumulation, release and genotoxicity of stainless steel particles in marine bivalve molluscs
- During the decommissioning and removal of radioactive material in nuclear facilities, fine, tritiated dusts of stainless steel, cement or tungsten are generated that could be accidently released to...
Effect of the Cu/ZnO/SBA?15/kaolinite Preparation Method on the Catalyst Structural Properties and Catalytic Performance at CO2 Hydrogenation at Low Pressure
19/05/2022 - Carbon dioxide catalytic hydrogenation to methanol in the presence of nanocatalysts has been recognized as one of the most effective ways to fix and utilize the emitted CO2. In this study,...
Efficient electrocatalytic reduction of NO to ammonia on BC3 nanosheets
01/09/2022 - Searching for an economical and highly efficient electrocatalytic reduction catalyst for ammonia synthesis under controllable conditions is a very attractive and challenging subject in chemistry. In...
Modelling co-gasification of plastic waste and lignin in supercritical water using reactive molecular dynamics simulations
- Supercritical gasification is a promising technology for the utilisation of biomass and plastic wastes. To further understand the synergistic effect of lignin and plastic co-gasification under the...
Superior-catalytic performance of Ni–Co layered double hydroxide nanosheets for the reduction of p-nitrophenol
- Ni–Co layered double-hydroxides (LDHs), with their lamellar morphology, and higher number of active sites, ensure efficient charge transfer. This makes them extremely useful for catalytic...
Assessment of micro?scale thermal behaviors and combustion performance of organic fireproof plugging material in air atmosphere
20/05/2022 - Organic fireproof plugging material (OFPM) has excellent flame retardance and is widely used in construction cable holes. In order to study the micro?scale thermal behaviors and combustion...
Effects of a composite flame retardant system on the flame retardancy and mechanical performance of epoxy resin adhesive
20/05/2022 - TG?IR spectra of pyrolysis products for the cured pure and flame retardant epoxy resin adhesive at different temperatures.A flame?retarded epoxy resin (ER) adhesive with strong flame retardancy and...
Role of Liquid-Phase Amount in Ceramization of Silicone Rubber Composites and Its Controlling
20/05/2022 - The reliable mechanical properties of ceramizable silicone rubber composites during pyrolysis are necessary for their application in the fire-resistant fields. The effects of liquid-phase amount on...
Laboratory Research on Design of Three-Phase AC Arc Plasma Pyrolysis Device for Recycling of Waste Printed Circuit Boards
22/05/2022 - Accumulation of electronic waste (e-waste) will place a heavy burden on the environment without proper treatment; however, most ingredients contained in it are useful, and it could bring great...
Hydrogen Storage Behavior and Performance of Multiple Cold-Rolled MgH2/Nb2O5 Nanocomposite Powders
19/05/2022 - The global interest in MgH2 is due to the natural availability of Mg and its capacity to retain hydrogen at a concentration of up to 7.60 wt.%. Despite its appealing characteristics and ease of...
Silicone-recycled pyrolyzed fillers for enhanced thermal - and flame - resistant silicone elastomers
01/06/2022 - Two types of fillers were prepared by controlled pyrolysis of a commercial silicone elastomer. An aerobic process led to the formation of a silica powder while an anaerobic pyrolysis generated a...
Comparison of the performances of epoxy resin thermosets cured by two P-containing anhydrides
01/06/2022 - Two P-containing anhydrides, ethyl (2,5-dioxotetrahydrofuran-3-yl) (methyl) phosphinate (MTA-MA) and 3-(5-oxido-6H-phosphanthridin-5-yl) dihydrofuran-2,5?dione (DOPO-MA), were synthesized and used...
Investigation on the heat resistance mechanism of phosphate containing formulations using the pyrolysis GC-MS system
01/06/2022 - Aiming to probe into the heat resistance mechanism of triallyl phosphate (TAP) modified polyolefin formulation, several phosphate containing model polymers or compounds were designed and their...
Pyrolysis of bottle?grade polyethylene terephthalate: Effect of carrier gases on carriage of pyrolysis products
18/05/2022 - PET granules were pyrolyzed in N2, He and Ar to evaluate the effect of carrier gas on the products. The molecular weight of the carrier gas was found a key parameter influencing the yields and...