☆ 4.7 Article

Theoretical-Experimental Study of the Action of Trace Amounts of Formaldehyde, Propionaldehyde, and Butyraldehyde as Inhibitors of the Ziegler-Natta Catalyst and the Synthesis of an Ethylene-Propylene Copolymer

POLYMERS (2023)

Related references

Note: Only part of the references are listed.

Article Engineering, Environmental

A new Valorization Route of Petrochemical Wastewater: Recovery of Phenolic Derivatives and their Subsequent Application in a PP Matrix for the Improvement of their Durability in Multiple Applications

Joaquin Hernandez-Fernandez et al.

Summary: Wastewater from industrial processes contains compounds that can be extracted and recirculated to improve circularity. This study evaluated the residual water generated during the polypropylene deodorization process and extracted additives used in resin synthesis. The recovered phenolic compound was found to improve the thermal properties of the material, increasing the circularity of the production process.

JOURNAL OF POLYMERS AND THE ENVIRONMENT (2023)

Add to Collection

Article Chemistry, Physical

Selective oxidation of ethanol to ethylene oxide with a dual-layer concept

Robin Himmelmann et al.

Summary: The article presents a new one-step process for the selective oxidation of ethanol to ethylene oxide, without the need for an ethylene purification step. This process utilizes a dual-layer concept and achieves stable operation with high conversions and selectivities.

CATALYSIS COMMUNICATIONS (2022)

Add to Collection

Article Chemistry, Analytical

Autocatalytic influence of different levels of arsine on the thermal stability and pyrolysis of polypropylene

Hernandez-Fernandez Joaquin et al.

Summary: The pyrolysis and thermo-degradation of virgin-polypropylene with different levels of arsenic in its polymer matrix at 500 degrees C were studied. The presence of arsine in propylene and arsenic in the residues significantly impacted the material properties, especially the melt flow index. The formation of arsine and other species led to mass loss and atypical thermal decomposition behavior in PP.

JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS (2022)

Add to Collection

Article Polymer Science

Effect of Addition of Polyurea as an Aggregate in Mortars: Analysis of Microstructure and Strength

Hernan Chacon et al.

Summary: This study investigates the addition of polyurea as a polymeric material in mortars. The results show that mortars with polyurea retained in sieve 100 exhibit the best thermal behavior and compressive strength.

POLYMERS (2022)

Add to Collection

Article Green & Sustainable Science & Technology

Identification and Quantification of Microplastics in Effluents of Wastewater Treatment Plant by Differential Scanning Calorimetry (DSC)

Joaquin Hernandez Fernandez et al.

Summary: Microplastics were found in three wastewater treatment plants, with preliminary treatment only removing less than 58% of the microplastics, while plants with secondary treatment achieved removal effectiveness between 90% and 96.9%.

SUSTAINABILITY (2022)

Add to Collection

Article Biochemistry & Molecular Biology

Detection of Bisphenol A and Four Analogues in Atmospheric Emissions in Petrochemical Complexes Producing Polypropylene in South America

Joaquin Hernandez Fernandez et al.

Summary: This study evaluated the emissions from polypropylene manufacturing facilities in Colombia and Brazil, detecting the presence of bisphenol A and four BPs in the released gaseous compounds, with a direct proportional connection found between MFI and the amount of bisphenol released.

MOLECULES (2022)

Add to Collection

Article Polymer Science

Effects of Different Concentrations of Arsine on the Synthesis and Final Properties of Polypropylene

Joaquin Hernandez-Fernandez et al.

Summary: This article investigates the effects of arsine on the synthesis and thermal degradation of polypropylene. Reaction mechanisms are proposed to explain the behavior, showing that arsine content is correlated with the fluidity index of polypropylene. The thermo-oxidative degradation is caused by the reaction of arsine with the titanium center of the catalyst, forming radical complexes that lead to the formation of functional groups and increased degradation peaks.

POLYMERS (2022)

Add to Collection

Article Biochemistry & Molecular Biology

Experimental Study of the Impact of Trace Amounts of Acetylene and Methylacetylene on the Synthesis, Mechanical and Thermal Properties of Polypropylene

Joaquin Hernandez-Fernandez et al.

Summary: This study evaluates the impact of acetylene and methyl acetylene impurities on the synthesis process and material properties of polypropylene. The findings reveal that low concentrations of these impurities have no effect on resin properties, but high concentrations result in decreased resistance. In production, decreasing concentrations of acetylene and methyl acetylene gradually affect the process.

INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES (2022)

Add to Collection

Article Engineering, Environmental

Development and Application of a Principal Component Analysis Model to Quantify the Green Ethylene Content in Virgin Impact Copolymer Resins During Their Synthesis on an Industrial Scale

Joaquin Hernandez-Fernandez et al.

Summary: The application of mathematical modelling and multivariate statistics in infrared spectrum analysis can accurately determine the molecular properties of substances. In this study, PCA analysis and PLS model were used to classify and determine the concentrations of polypropylene and polyethylene in a binary polymer mixture. This method showed good reproducibility and could predict the polyethylene content in pellets without the use of any chemicals.

JOURNAL OF POLYMERS AND THE ENVIRONMENT (2022)

Add to Collection

Article Polymer Science

Impact of Traces of Hydrogen Sulfide on the Efficiency of Ziegler-Natta Catalyst on the Final Properties of Polypropylene

Joaquin Hernandez-Fernandez et al.

Summary: This study investigates the effects of H2S content on polypropylene polymerization by controlled dosages, finding that the fluidity index increases directly proportional to the concentration of H2S. It also reveals the reaction mechanism between the active center formed for polymerization and H2S, as well as the impact of trace impurities in raw materials on the process.

POLYMERS (2022)

Add to Collection

Review Environmental Sciences

Quantification and elimination of substituted synthetic phenols and volatile organic compounds in the wastewater treatment plant during the production of industrial scale polypropylene

J. Hernandez-Fernandez et al.

Summary: This study focused on the substituted synthetic phenols and VOCs in the industrial waste water and gases from a polypropylene (PP) production plant. Monitoring over a year identified five phenols in the waste water and 41 VOCs in the gas sample.

CHEMOSPHERE (2021)

Add to Collection

Review Biochemical Research Methods

Development and validation of a methodology for quantifying parts-per-billion levels of arsine and phosphine in nitrogen, hydrogen and liquefied petroleum gas using a variable pressure sampler coupled to gas chromatography-mass spectrometry

J. Hernandez-Fernandez et al.

Summary: An analytical methodology using a variable pressure sampler (VPS) coupled to a gas chromatograph-mass spectrometry (GC-MS) was developed for the identification and quantification of arsine (AsH3) and phosphine (PH3) traces. The method showed high linearity, low detection and quantification limits, and was validated with real samples.

JOURNAL OF CHROMATOGRAPHY A (2021)

Add to Collection

Article Environmental Sciences

Quantification of arsine and phosphine in industrial atmospheric emissions in Spain and Colombia. Implementation of modified zeolites to reduce the environmental impact of emissions

J. Hernandez-Fernandez

Summary: This research focuses on the emissions of arsine and phosphine in two petrochemical plants in Colombia and Spain during the purification of liquefied petroleum gas, demonstrating the challenges and contributions to environmental sciences. A new analytical method was developed, showing that the use of columns filled with zeolite on an industrial scale can reduce the impact of these pollutants on the atmosphere.

ATMOSPHERIC POLLUTION RESEARCH (2021)

Add to Collection

Article Chemistry, Analytical

Experimental study of the auto-catalytic effect of triethylaluminum and TiCl4 residuals at the onset of non-additive polypropylene degradation and their impact on thermo-oxidative degradation and pyrolysis

Joaquin Hernandez-Fernandez et al.

Summary: The study conducted pyrolysis and thermo-oxidative degradation of five industrial waste products by using a discontinuous quartz reactor under the auto-catalytic effect of residues of titanium tetrachloride, triethylaluminium, and iron. The analysis found that the concentration of catalyst residuals affects the activation energy and the evolution of various gases and compounds during degradation. The study also proposed initial reaction mechanisms and secondary reaction routes based on the quantified volatile compounds in the waste products.

JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS (2021)

Add to Collection

Review Chemistry, Physical

Three-phase electrochemistry for green ethylene production

Zeping Wang et al.

Summary: The electrochemical conversion of greenhouse gases into ethylene has attracted worldwide attention as an energy-saving and environmentally friendly process. Efforts have been made to enhance the performance of electrochemical reactions, with a focus on the three-phase interface and mass transfer processes. Comprehensive understanding of these reactions can provide insights into the design of advanced electrochemical cells for green ethylene production.

CURRENT OPINION IN ELECTROCHEMISTRY (2021)

Add to Collection

Article Food Science & Technology

Films Based on Thermoplastic Starch Blended with Pine Resin Derivatives for Food Packaging

Cristina Pavon et al.

Summary: Completely biobased and biodegradable thermoplastic starch (TPS) based materials with tunable performance were prepared for food packaging applications by blending TPS with different pine resins derivatives. The addition of pine resin derivatives increased the hydrophobicity and elastic component of TPS, improving water resistance and structure strength. The materials were found to be suitable for biodegradable rigid food packaging applications based on their performance and ability to disintegrate under composting conditions.

FOODS (2021)

Add to Collection

Article Biochemical Research Methods

Quantification of poisons for Ziegler Natta catalysts and effects on the production of polypropylene by gas chromatographic with simultaneous detection: Pulsed discharge helium ionization, mass spectrometry and flame ionization

Hernandez-Fernandez Joaquin et al.

JOURNAL OF CHROMATOGRAPHY A (2020)

Add to Collection

Article Agricultural Engineering

Effects of gravel mulch on surface energy balance and soil thermal regime in an unheated plastic greenhouse

Santiago Bonachela et al.

BIOSYSTEMS ENGINEERING (2020)

Add to Collection

Article Biochemical Research Methods

Quantification of oxygenates, sulphides, thiols and permanent gases in propylene. A multiple linear regression model to predict the loss of efficiency in polypropylene production on an industrial scale

Joaquin Hernandez-Fernandez

JOURNAL OF CHROMATOGRAPHY A (2020)

Add to Collection

Article Materials Science, Multidisciplinary

Enhancing the Thermal Stability of Polypropylene by Blending with Low Amounts of Natural Antioxidants

Joaquin Hernandez-Fernandez et al.

MACROMOLECULAR MATERIALS AND ENGINEERING (2019)

Add to Collection

Article Energy & Fuels

Greening the green ethylene with microwaves

L. A. Jermolovicius et al.

CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION (2018)

Add to Collection

Article Energy & Fuels

Effect of compression ratio on combustion and emission characteristics of CI Engine operated with acetylene in conjunction with diesel fuel

Kapil Dev Choudhary et al.

FUEL (2018)

Add to Collection

Article Chemistry, Physical

Interaction of different poisons with MgCl2/TiCl4 based Ziegler-Natta catalysts

Naeimeh Bahri-Laleh

APPLIED SURFACE SCIENCE (2016)

Add to Collection

Article Polymer Science

Effect of AlEt3 and an External Donor on the Distribution of Active Sites According to Their Stereospecificity in Propylene Polymerization over TiCl4/MgCl2 Catalysts with Different Titanium Content

Marina Nikolaeva et al.

MACROMOLECULAR CHEMISTRY AND PHYSICS (2016)

Add to Collection

Article Polymer Science

Molecular structure and local dynamic in impact polypropylene copolymers studied by preparative TREF, solid state NMR spectroscopy, and SFM microscopy

Almudena Fernandez et al.

POLYMER (2015)

Add to Collection

Review Chemistry, Physical

Ethylene Formation by Catalytic Dehydration of Ethanol with Industrial Considerations

Denise Fan et al.

MATERIALS (2013)

Add to Collection

Article Polymer Science

Thermal fractionation and effect of comonomer distribution on the crystal structure of ethylene-propylene copolymers

Zi-Xiu Du et al.

POLYMER (2009)

Add to Collection

Article Polymer Science

Key elements in the structure and function relationship of the MgCl2/TiCl4/Lewis base Ziegler-Natta catalytic system

Andrea Correa et al.

MACROMOLECULES (2007)

Add to Collection

Article Polymer Science

Crystallization of a miscible propylene/ethylene copolymer blend

Y. S. Hu et al.

POLYMER (2006)

Add to Collection

© Peeref 2019-2024. All rights reserved.