Chemical Engineering

Orbitally Shaken Bioreactors - Viscosity effects on flow characteristics
Phase resolved PIV measurements were carried out to assess the flow dynamics occurring in orbitally shaken bioreactors of cylindrical geometry when working fluids of increasing viscosity are considered. Study of the phase-resolved flow characteristics allowed to built a Re-Fr map, where four quadrants associated to different flow regimes are identified: in-phase toroidal vortex (low Fr, high Re...


Catalytic conversion of trichloroethylene on nickel containing beta zeolites into value added products
Nickel containing BEA zeolites, NiSiBEA and NiHAlBEA, with 2wt% of Ni were prepared by a two-step postsynthesis method and conventional wet impregnation. The calcination of NiSiBEA and NiHAlBEA at 773K for 3h in air led to the formation of C-NiSiBEA and C-NiHAlBEA. After reduction at 873K for 3h in flowing 10% H2/Ar, red-C-NiSiBEA and red-C-NiHAlBEA were obtained and investigated as the catalys...
Higher Hydrocarbon Production through Oxidative Coupling of Methane Combined with Hydrogenation of Carbon Oxides
In the production of higher hydrocarbons, combining oxidative coupling of methane (OCM) with hydrogenation of the formed carbon oxides in a separate reactor provides an alternative to the currently applied methane conversion to syngas followed by Fischer-Tropsch synthesis. The effects of CH4:O2 feed ratio in the OCM reactor and partial pressures of H2 or/and H2O in the hydrogenation reactor wer...


Tropfenseparation aus der Gasphase in kleinskaligen Ringkammerzentrifugen# / Droplet Separation from the Gas Phase in Small-Scale Ring Chamber Centrifuges
Hier werden laminare Strömungsvorgänge in kleinskaligen Ringkammerzentrifugen untersucht, um das Abscheideverhalten von Ölaerosolen mithilfe von Modellregeln und Ähnlichkeitsgesetzen zu beschreiben. Dabei sind die Ermittlung des Trenngrades in Abhängigkeit der Zentrifugengeometrie, die Stoffeigenschaften der kontinuierlichen und dispersen Phasen sowie Betriebsparameter wie Winkelgeschwindi...
Präparation von Kohlen für die Negativ-Ionen-Laserdesorptions-Ionisations- Massenspektrometrie / Preparation of Coals for Negativ-Ion Laser Desorption/Ionization Mass Spectrometry
Für die Negativ-Ionen-Laserdesorptions-Ionisations-Massenspektrometrie von Kohlen existiert nur eine geringe Anzahl an Präparationsmethoden, die jedoch eine geringe Probenkapazität aufweisen. In dieser Arbeit wird daher eine neue Probenpräparationsmethode für Kohlen vorgestellt. Dabei wird die Probe als Dispersion mit Glycerin oder Polyethylenglycol 400 und Wasser auf einen Probeträger ...


Efficacy of a heterocyclic ligand anchored biopolymer adsorbent for the sequestration of palladium
The present work describes the interaction between biopolymer chitosan and mercaptobenzimidazole (MBI) for the adsorption of palladium. The effective coordination with palladium occurs through a secondary host–guest interaction. The probable adsorption mechanism could be understood through FT-IR, SEM, EDX and XRD techniques. The pH of aqueous medium and the adsorbent dosage were optimized thr...
Fast pyrolysis of torrefied sewage sludge in a fluidized bed reactor
The pyrolysis of dry and of torrefied sewage sludge in a lab-scale fluidized bed reactor has been studied in order to determine whether torrefaction pre-treatment could enhance the properties of the liquid product obtained after pyrolysis. The aim of this work is to evaluate the influence of the torrefaction temperature (220–320°C) and average solid residence time (3.6–10.2min) on the prod...

Effective and reusable oil/water separation membranes based on modified polysulfone electrospun nanofiber mats
Membrane technology is the most promising process for oil/water separation operation if the hydrophilicity, fouling and reusability properties could be improved. In this study, novel effective and reusable membrane for oil–water separation process is introduced based on modification of polysulfone (PSF) electrospun nanofiber mats. The modification process was achieved by incorporation of NaOH...
Oxidation of textile wastewater using cylinder Ti/β-PbO2 electrode in electrocatalytic tube reactor
Electrocatalytic tube reactor using Ti/PbO2 cylinder electrode had been fabricated to degrade textile wastewater. The electrode was synthesized by anodic electrodeposition method. It was utilized as an anode and paired with stainless steel cathode located in the center of electrocatalytic tube and connected to a driving engine that enabled it to be used as mixer. Reactor was operated by flowing...

Support vector machine and CPA EoS for the prediction of high-pressure liquid densities of normal alkanols
The already numerous industrial applications of alcohols is continuously growing to even higher significance. Accurate estimations of the physical properties of various alcohols within wide ranges of pressures and temperatures are necessary in the design and optimum operation of such processes. In this study, high-pressure liquid densities of the first six members of the normal alkanol family w...
Adsorption of 2,4-dichlorophenoxyacetic acid (2,4-D) from water by in situ generated metal hydroxides using sacrificial anodes
This research paper deals with an evaluation of electrochemical coagulation process, where the metal hydroxides are generated in-situ, for the removal of 2,4-dichlorophenoxyacetic acid (2,4-D) from water using different anode materials like iron, magnesium, zinc and aluminum with galvanized iron as the cathode. The optimization of different experimental parameters like current density, pH, temp...

Reconstruction and analysis of a signal transduction network using HeLa cell protein–protein interaction data
Cancer is a complex disease that is strongly associated with defects in signal transduction pathways. A systematic understanding of signal transduction networks in cancer cells will make it possible to develop alternative therapeutic strategies. However, this understanding relies, at least in part, on the detection of endogenous protein–protein interactions (PPIs) that participate in these ne...
Water Loss Versus Soaking Time: Spontaneous Imbibition in Tight Rocks
The combined application of multilateral horizontal drilling and multistage hydraulic fracturing has successfully unlocked unconventional tight hydrocarbon reservoirs. However, the field data show that only a small fraction of the injected water during hydraulic fracturing treatments is recovered during flowback operations. The fate of nonrecovered water and its impact on hydrocarbon production...
The Gouy-Stodola Theorem in Bioenergetic Analysis of Living Systems (Irreversibility in Bioenergetics of Living Systems)
Thermodynamics studies the transformations of energy occurring in open systems. Living systems, with particular reference to cells, are complex systems in which energy transformations occur. Thermo-electro-chemical processes and transports occur across their border, the cells membranes. These processes take place with important differences between healthy and diseased states. In particular, dif...
The first manganese N-confused porphyrins catalyzed oxidation of alkene
A series of N-methyl N-confused porphyrin manganese complexes (3a–3f) were synthesized and characterized by UV–vis, XPS, HR-MS and cyclic voltammetry. These complexes were utilized to catalyze the styrene oxidation. It turned out their catalytic activities were comparable with manganese tetraphenylporphyrin (MnTPP). among all investigated manganese N-confused porphyrins, the most electron d...