The present study is focused on polylactic acid (PLA) blending with bio nanoadditives, such as Tonsil® (clay) and Aerosil®, to obtain nanocomposites for a new generation of food packaging. basic composition was enhanced using Sorbitan oleate (E494) Proviplast plasticizers, increasing the composite samples’ stability their mechanical strength. Four mixtures were prepared: S1 Tonsil®; S2 Aerosil®; S3 Aerosil® + Proviplast; S4 Sabosorb. They complexly characterized by FT-IR spectroscopy,...

The aim of the study was to prepare effective low-cost green adsorbents based on spent black tea leaves for removal nitrate ions from aqueous solutions. These were obtained either by thermally treating produce biochar (UBT-TT), or employing untreated waste (UBT) obtain convenient bio-sorbents. characterized before and after adsorption Scanning Electron Microscopy (SEM), Energy Dispersed X-ray analysis (EDX), Infrared Spectroscopy (FTIR), Thermal Gravimetric Analysis (TGA). experimental...

Abstract Bio-oil produced from biomass pyrolysis has the potential to become an alternative renewable fuel. However due high content of oxygenated compounds is unsuitable as transportation The objective this work evaluate catalytic activity CoMo /γ-Al 2 O 3 -HMS in hydrotreating process bio-oil. prepared catalyst was characterized by different techniques (X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron...

Abstract This study focuses on the development of bioactive packaging materials by incorporating grape pomace and copper particles into polylactic acid (PLA) composites. The goal is to increase shelf life packaged foods while benefiting health consumers through use these active materials. 6 recipes composite based Proviplast 2624 plasticizer were obtained. additives added were: pomace, at 0.5%, 1% 1.5%, particles, formed using PEG 600 + CuSO₄, 2%, 5% 8%. Material characterization techniques:...

Tungstophosphoric acid (H3PW12O40) supported on silica-coated magnetite nanoparticles has been prepared and used as a heterogeneous catalyst (Fe3O4@SiO2@HPW) in the condensation of benzaldehyde (B) with glycerol (Gly) for production cyclic acetals. Physicochemical techniques, including scanning electron microscopy (SEM), transmission (TEM), Fourier-transform infrared spectrometry (FTIR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), N2 physisorption were to characterize...

The removal yield of organic substances present in water depends on the environmental conditions, chemical composition and substance dissolved water, which constitutes substrate metabolic activities microalgae that use these biochemical reactions cellular enzyme complexes. o-Chlorobenzylidene malononitrile (CS, to its military designation) was synthesized in-house, for research purposes, by a condensing reaction between o-chlorobenzaldehide malononitrilein presence diethylamine. detection,...

This study focuses on optimizing the storage capacity of an underground natural gas facility through numerical modeling and simulation techniques. The reservoir, characterized by elongated dome structure, was discretized into approximately 16,000 cells. Simulations were conducted using key parameters such as permeability (10–70 mD) porosity (12–26%) to assess dynamics injection pressure distribution. model incorporated core petrophysical data accurately represent reservoir’s behavior. By...

Mixture based on peracetic acid and hydrogen peroxide is a more powerful oxidant than chlorine dioxide. The reactivity of this oxidizing mixture with the polluting substances in water: ammonium compounds, nitrites, iron, manganese, organic proteins evaluated study. results obtained after tasting mixture, using various natural groundwater matrices shows an oxidation efficiency over 90% nitrite content, between 40-70% iron 25-50% for manganese forms. advantage compared to thechlorine that they...

The military taxonomy of class indices for chemical and biological warfare agents considers halogenated tear (CS) to be incapacitating causing local pain discomfort with associated reflexe. removal yield the organic substances present in water depends on environmental conditions, composition substance dissolved water, which constitutes substrate metabolic activities microorganisms that use these biochemical reactions cellular enzyme complexes. two -CN groups malonic nitrile molecule are...

This work is aimed at selection of a suitable support for CoMoRe catalyst in hydrodesulfurization (HDS) thiophenes. g-Al2O3 and g-Al2O3-HMS were used as with 4%Co, 8%Mo 0.5%Re loading. The metal loading was incorporated by using the pore volume impregnation method, employing aqueous solutions cobalt (II) nitrate, ammonium molibdate rhenium (VII) oxide. catalysts sulfided dimethyl disulphide 250 �C 10 h finally tested HDS reaction thiophene benzothiophene different temperature pressure...

Hydrodesulphurization of dimethyldisulphide was performed on Ni-Co-Mo /�-Al2O3 catalyst. The catalyst characterized by determining the adsorption isotherms, pore size distribution and acid strength. Experiments were carried out a laboratory echipament in continuous system using fixed bed catalytic reactor at 50-100�C, pressure from 10 barr to 50 barr, liquid hourly space velocity 1h-1 4h-1 molar ratio H2 / 60/1. A simplified kinetic model based Langmuir�Hinshelwood theory, for...

Bioactive glass is currently considered a material with high biocompatibility and has been used both in the field of bone regeneration preparation cosmetic products controlled release active compounds. The present work involved study on synthesis bioglass using sol-gel process. aims to evaluate influence treatment Polyethylene glycol 4000 (PEG 4000) its main characteristics. surface characteristics this were obtained by nitrogen adsorption/desorption analysis, standard BET...

Abstract The hydrodesulphurization of a model component and equimolar ternary mixture thiophene, 2-ethylthiophene benzothiophene over sulphided CoMo/γ-Al 2 O 3 -Nb 5 catalysts were investigated in fixed bed flow reactor. prepared by incipient wetness impregnation method characterized textural characteristics, total acidity chemical species present on the surface. characterization results showed that both exhibit mesoporous structure with cylindrical pores open at ends, evidenced IV type...

The aim of this study was to obtain three experimental resin-based cements containing GO and HA-Ag for posterior restorations. samples (S0, S1, S2) shared the same polymer matrix (BisGMA, TEGDMA) powder mixture (bioglass (La2O3 Sr-Zr), quartz, GO, HA-Ag), with different percentages graphene oxide (0%, 0.1%, 0.2% GO) silver-doped hydroxyapatite (10%, 9.9%, 9.8% HA-Ag). physical–chemical properties (water absorption, degree conversion), mechanical (DTS, CS, FS), structural (SEM, AFM),...

Activation of N2 to ammonia occurs in nitrogenases at an unusual carbide-iron-sulfur active site. To deconvolute the factors that allow nitrogenase Fe bind N2, we have recently reported a density functional theory (DFT) study on series Fe(H2O)nR(N2) complexes, Fe(0)/Fe(I)/Fe(II)/Fe(III), and R = H2O, HO−, CH22−, or H2S. Reported here are computations Mn Co complexes settings with methodology identical those previously employed for related systems order compare ability these metals activate...

The paper presents a simulation-based approach for optimizing CO2 injection into depleted gas reservoirs, with the goal of enhancing underground storage. research employs two-dimensional dynamic reservoir model, developed using Darcy’s law, to describe flow in pressure-homogeneous porous medium, along real equations. model integrates Du Fort–Frenkel and finite-difference methods accurately simulate behavior during Real data from an operational storage facility were used calibrate model....

Desulfurisation of 1-dodecanethiol was performed by adsorption process on MgO adsorbent. The adsorbant characterized determining the isotherms, specific surface area, pore volume and average diameter. Adsorption experiments were in continuous system at 300-450�C, 5 atm hourly space velocities 1�2 h-1. Conversion 1-dodecanetol increases with increasing temperature decreasing velocities. It identified stage determinant a kinetic study desulfurization developed reactive magnesium oxide

Hydrotreating of furfural in order to obtain furan derivatives, components for gasoline was studied on two catalysts Ni-Co-Mo /g-Al2O3 promoted with Ba and respectively Pt-Pd/g-Al2O3. Catalysts characterization where performed by determining the acid strength textural characteristics. For both main reaction products identified are tetrahydrofurfuryl alcohol, methyl ether, furfuryl alcohol most valuable component from resulting mixture being ether. Catalyst Pt-Pd/g-Al2O3 showed higher...

The hydrodesulphurization (HDS) of thiophenes was performed on metallic catalyst CoMoRe/ZSM5-gAl2O3. Experiments were carried out a fixed bed catalytic reactor at 175-300�C, 30-60 atm, thiophene volume hourly space velocities 1h-1- 4h-1 and molar ratio hydrogen/thiophene 60/1. Texture features like specific surface area, the pore average diameter decrease after sulfurization. conversion CoMoRe/gAl2O3-Zn-HZSM 5 differs with nature studied thiophenes.