Papers by Christian Paulik
‘Novel synthesis strategy for the production of fully bio‐based binders using 2,5‐diformylfuran’
European Journal of Organic Chemistry, May 24, 2023
In this work, resol based binders were prepared with lignin, resorcinol and the bio‐based aldehyd... more In this work, resol based binders were prepared with lignin, resorcinol and the bio‐based aldehydic platform chemicals 5‐hydroxymethylfurfural (HMF) and 2,5‐diformylfuran (DFF). In preliminary studies, the solubility and stability of DFF in aqueous‐alkaline conditions was investigated. Various binders were prepared to investigate the influence of the HMF‐DFF ratio and the influence of the aldehyde concentration on the molar mass, rheological properties and curing characteristics of the final binders. It is shown that significantly higher molecular weights and viscosities are obtained by using DFF instead of HMF. The properties of the final binder could also be affected by the precise choice of DFF concentration, as this resulted in higher levels of crosslinking. This work offers a novel type of fully bio‐based binder that consists of non‐toxic components and is therefore less hazardous than some conventional binders.
Author response for "Kinetic and Mechanistic Aspects of Furfural Degradation in Biorefineries
Rational construction of g-C3N4/SnO2/CoFe2O4 dual Z-scheme system as a potential scaffold for fluorescence sensing and visible light driven photocatalytic degradation of lethal pollutants
Journal of environmental chemical engineering, Aug 1, 2023
Branched Comonomers in Lldpe – Influence of Short Chain Branch Shape on Crystallinity
Macromolecular Reaction Engineering, Jul 12, 2023
Efficient and Selective Aerobic Oxidation of 5‐hydroxymethylfurfural to 2,5‐diformylfuran at Moderate Reaction Conditions with Design of Experiments Approach
ChemistrySelect, Sep 22, 2022
Heterogeneous catalytic oxidation of 5‐hydroxymethylfurfural (HMF) with molecular oxygen to 2,5‐d... more Heterogeneous catalytic oxidation of 5‐hydroxymethylfurfural (HMF) with molecular oxygen to 2,5‐diformylfuran (DFF) was performed on aluminium oxide‐supported ruthenium catalysts (Ru/Al2O3). The ruthenium catalysts were analyzed by pH and Brunauer‐Emett‐Teller (BET) measurement, and potential side products measured by HPLC‐UV. High catalyst activity with near‐quantitative DFF yield (>99.9 %) was achieved in toluene under moderate reaction conditions (90 °C, 0.2 MPa O2). Various Al2O3 supports were screened for optimal catalyst activity and selectivity for DFF, and the most effective was chosen for a Design of Experiments (DoE). With a central composite design based on a response‐surface model, the effects of reaction parameters (i. e., catalyst amount, oxygen pressure and temperature) on the reaction rate were investigated, and the selected model tested by analysis of variance (ANOVA). The modeling showed that catalyst amount had the highest relative impact on the reaction rate, and afforded in‐depth knowledge about the chemical space investigated.
Polypropylene
Ullmann's Encyclopedia of Industrial Chemistry, Mar 26, 2014
Techno-economic evaluation of the electrochemical production of renewable ethylene oxide from fluctuating power sources and CO2
Journal of CO2 utilization, Sep 1, 2023
Biologische Methanproduktion mit Archaea ‐Stämmen unter Hochdruckbedingungen
Chemie Ingenieur Technik, Aug 28, 2020
Propylene-ethylene random copolymers: Comonomer effects on crystallinity and application properties
Journal of Applied Polymer Science, Jan 11, 2005
For understanding the correlation chain from the polymer structure to the final application prope... more For understanding the correlation chain from the polymer structure to the final application properties of propylene–ethylene random copolymers, four commercial grades with different ethylene content (0–8 mol %) but identical molecular weight distributions were investigated. Structural investigations concerning the comonomer distribution, using two different techniques (temperature rising elution fractionation and stepwise isothermal segregation), showed an increase of inhomogeneity with the total comonomer content, which was reflected for temperature rising elution fractionation in a widening of the elution temperature range. Crystallinity and crystallization speed studies confirmed the reduced overall crystallinity and increase of γ‐modification content as reported previously, but they also showed the reason for these effects in the distinctive decrease of the spherulitic growth speed. Good correlations of all these parameters to the mechanical performance of the four materials were obtained. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 95: 1073–1081, 2005
Macromolecular Reaction Engineering, Sep 1, 2022
The sustainability of consumer materials, such as plastics, belongs to the most important aspect ... more The sustainability of consumer materials, such as plastics, belongs to the most important aspect of eco-efficiency analyses. Besides mechanical recycling, chemical recycling represents an interesting waste management pathway. In theory, this technique does not rely on single-grade feedstock to maintain product quality. However, cross-contamination of feedstocks potentially leads to above-specification impurities in obtained pyrolysis oils. This study investigates the potential downstream poisoning of a fourth-generation Ziegler-Natta catalyst, using selected model poisons at high (worst-case) concentrations. With experimental and computational analysis, economic feasibility factors such as catalyst activity and microstructural properties are evaluated during the synthesis of high-density polyethylene (HDPE) and linear low-density polyethylene (LLDPE). Noticeable effects on the catalyst activity can be observed when the poison interacts with the co-catalyst, whereas a lower impact is observed for interactions with the activated catalyst-co-catalyst complex. Molecular weight distribution (MWD) and comonomer composition distribution (CCD) modeling highlighted marginal to no polymer property changes caused by contaminants. Combined with the applicability of pyrolysis post-treatments, these observations show that chemical recycling can be a promising technique for post-consumer plastic waste treatment.
Tethering cellulose fibers with disulphide linkages for rapid and efficient adsorption of mercury ions and dye from wastewater: Adsorption mechanism and process optimization using RSM
Separation and Purification Technology, Oct 1, 2023
Influence of hollow glass microspheres on 1K epoxy structural adhesive for the automotive industry
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Papers by Christian Paulik