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Ammonium removal from coking wastewater in a pilot‐scale two‐stage aerobic biofilm system: Biokinetic analysis

15.10.2016 | Xin Zhou, Zeqian Zhang, Yaxin Li, The Canadian Journal of Chemical Engineering, 2016

Abstract A novel four‐stage pilot‐scale anaerobic/anoxic/oxic/oxic (A2/O2) biofilm process was successfully developed to treat coking wastewater with high ammonium loading. In this study, three different dynamical models including first‐order substrate removal model, Monod‐biological contact ...


Bayesian network and bow tie to analyze the risk of fire and explosion of pipelines

14.10.2016 | Zerouali Bilal, Kara Mohammed, Hamaidi Brahim, Process Safety Progress, 2016

As accidents were and still one of the main reasons standing behind the increasing rates of casualties such as death, injuries, and evacuations, the constant improvement of safety measures especially in the field of hydrocarbons remains a major concern. Therefore, in the work in hand, we attempt ...


Cylindrical‐conical spouted bed dynamics: Laminar and turbulent flow predictions

14.10.2016 | Md Omar Reza, Alexander Laugwitz, Petr Nikrityuk, The Canadian Journal of Chemical Engineering, 2016

Abstract This work is devoted to the numerical study of transient behaviour of particulate flows in a cylindrical‐conical spouted bed in terms of comparative analysis of different models predictions. In particular, two approaches have been used: a laminar flow model and a turbulent flow ...


Real‐time resource efficiency indicators for monitoring and optimization of batch‐processing plants

13.10.2016 | Marc Kalliski, Sebastian Engell, The Canadian Journal of Chemical Engineering, 2016

ABSTRACT This paper presents a framework for the definition and calculation of Real‐Time Resource Efficiency Indicators (REI) for batch processes. The indicators are based on the allocation of resource and energy inputs to the individual batches and recipe operations as the basis for a ...


Effect of interactions between spray jets on liquid distribution in a fluidized bed

13.10.2016 | Cedric Briens, Helal Elkolaly, Franco Berruti, Jennifer McMillan, The Canadian Journal of Chemical Engineering, 2016

ABSTRACT In Fluid CokersTM, banks of spray nozzles are used to inject oil in a bed of hot coke particles. The purpose of this study is to determine whether interactions between spray jets could enhance liquid distribution on hot coke particles, which is crucial to improve the operability and ...


Hydrodynamic difference between inline and batch operation of a rotor‐stator mixer head ‐ a CFD approach

13.10.2016 | Andreas Håkansson, Dragana Arlov, Fredrik Carlsson, Fredrik Innings, The Canadian Journal of Chemical Engineering, 2016

ABSTRACT Rotor stator mixers (RSMs) can be operated in either batch or inline mode. When operating a rotor‐stator geometry in batch mode, it typically experiences an order of magnitude higher volumetric flow through the stator than in inline mode. This is expected to cause difference to the ...


Modeling and Simulation of Hydrodynamic Bubble‐Liquid Turbulent Flows in Bubble Column Reactor

13.10.2016 | Xiangli Li, Guohui Li, Chemical Engineering & Technology, 2016

Abstract Bubble dispersion characteristics play important role for the heat and mass transfer of bubble‐liquid two‐phase turbulent flow in bubble column reactor. In order to quantitatively describe the effect of operation condition and sparger design on two‐phase turbulent hydrodynamics in ...


Thermal Decomposition of Sulfur Compounds and their Role in Coke Formation during Steam Cracking of Heptane

12.10.2016 | Natalia Olahova, Marko R. Djokic, Ruben Van de Vijver, Nenad D. Ristic, Guy B. Marin, Marie‐Françoise Reyniers, Kevi ..., Chemical Engineering & Technology, 2016

Abstract Sulfur‐containing compounds play a key role in many industrial processes. Particularly for the steam cracking process, they have been linked with increased olefin selectivity, CO formation, and coke inhibition. The influence of four different sulfur‐containing additives, ...


Mechanism and kinetics of curing of diglycidyl ether of bisphenol a (DGEBA) resin by chitosan

12.10.2016 | Praveen Kumar Balasubramani, Jude O. Iroh, Polymer Engineering and Science, 2016

Crosslinking behavior of Diglycidyl Ether of Bisphenol A (DGEBA) resins cured by chitosan was isothermally studied by Fourier Transform Infrared (FTIR) Spectroscopy for various molar ratios of chitosan at different temperatures. Results indicated that oxirane undergoes nucleophilic attack by the ...


Artificial Neural Network Modeling of Hydrodynamics of Liquid‐Solid Circulating Fluidized Bed

12.10.2016 | Ritesh Ramesh Palkar, Vidyasagar Shilapuram, Chemical Engineering & Technology, 2016

Abstract Solids holdup and solids circulation rate are the two important hydrodynamic variables affected by process conditions. These two variables have a significant influence on the performance of a liquid‐solid circulating fluidized bed (LSCFB). In this work, Artificial Neural Network (ANN) ...


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