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Modelling of deactivation of Pd‐Au catalyst in vinyl acetate synthesis from oxidation of ethylene and acetic acid in the gaseous phase

22.11.2015 | Kazem Motahari, Amin Borumandnejad, Garry L Rempel, Saba Lashkarara, The Canadian Journal of Chemical Engineering, 2015

Abstract Vinyl acetate monomer (VAM) is produced from oxidation of ethylene and acetic acid on a Pd‐Au/SiO2 catalyst in the gaseous phase. A progressive loss in activity occurs during the lifetime of a commercial Pd‐Au/SiO2 VAM synthesis catalyst; thus, the efficiency of the reaction ...


Hydraulic performance of Winpak‐C modular catalytic structured packing

22.11.2015 | Jinming Li, Huidian Ding, Wenyu Xiang, Ting Zhang, Min Tao, Chunjiang Liu, The Canadian Journal of Chemical Engineering, 2015

Abstract The use of catalytic distillation (CD) in chemical production has gained popularity in recent years, as it results in minimized installation costs and increased efficiency. However, the design of suitable modular catalytic structured packing (MCSP) for CD processes remains a ...


Influence of physical‐chemical parameters of organic solutes on the retention and flux in NF process

20.11.2015 | Asución M. Hidalgo, María Gómez, María D. Murcia, Elisa Gómez, Gerardo León, Elisa Cascales, Chemical Engineering & Technology, 2015

Abstract A comparative study of several organic compounds (atrazine, aniline, phenol, and their derivatives, 4−chlorophenol, 4−nitrophenol and 4−nitroaniline), and their removal from aqueous solutions by nanofiltration using an NF−97 polyamide membrane is presented. The aim was to ascertain ...


Optimal Retrofit Design of Crude Distillation Units for Processing Shale Gas/Natural Gas Condensate Oil

20.11.2015 | Ziyuan Wang, Qiang Xu, Thomas Ho, Dan F. Smith, Chemical Engineering & Technology, 2015

Abstract Condensate oil is a kind of light crude oil with API gravity higher than 50 degrees. The increasing production of condensate oil due to shale gas/natural gas booming has economically motivate refiners to add this valuable and abundant crude source into their feedstock. Many ...


Toward the prediction of porous membrane permeability from morphological data

20.11.2015 | Claudia Nurra, Luizildo Pitol‐Filho, Raphaelle Carraud, Said Pertuz, Domènec Puig, Miguel A. García, Joan Salvadó, C ..., Polymer Engineering and Science, 2015

One of the challenges in membrane technology is predicting permeability in porous membranes for liquid applications in an easy and inexpensive way. This is the aim of this work. To achieve this objective, several techniques can be considered. In this study, a morphological approach from ...


A study on antioxidant depletion and degradation in polyolefin‐based geosynthetics: Sacrificial versus regenerative stabilization

20.11.2015 | Werner W. Müller, Ines Jakob, Renate Tatzky‐Gerth, Andreas Wöhlecke, Polymer Engineering and Science, 2015

Plastic products used in geotechnical engineering, so‐called geosynthetics, are often made of polyolefins (polyethylene or polypropylene) and stabilized against oxidative degradation by antioxidants (AO). Three types of AO “packages” are used: (P1) phenols and phosphites/sulfides, (P2) hindered ...


Experimental study of the hydraulic characteristics of a coal log train in a pipe

18.11.2015 | Wenjuan Li, Shengyong Lu, Yong Liu, Jianhua Yan, Alfons G. Buekens, The Canadian Journal of Chemical Engineering, 2015

Abstract The pressure distribution around two coal logs in tandem (a coal log train) flowing in a horizontal pipe (inner diameter of 50 mm) is experimentally studied. Experiments are conducted at three water velocities (0.92, 1.10, and 1.50 m/s; corresponding Reynolds numbers 45 771, 54 726, ...


Investigation of Photon Fluxes within Microstructured Photoreactors Revealing Large Optimization Potentials

18.11.2015 | Dirk Ziegenbalg, Benjamin Wriedt, Günter Kreisel, Dana Kralisch, Chemical Engineering & Technology, 2015

Abstract A simple model for determining potential bottlenecks of a photoreactor setup, focusing on the photon fluxes, is presented. The application of the concept can reveal optimization potentials and gives insights into the sensitivity of the reactor setup to different optimization ...


Mid infrared spectroscopy for monitoring of AD processes ‐ Prospects and Challenges

18.11.2015 | Robin Eccleston, Christian Wolf, Matthias Balsam, Franziska Schulte, Michael Bongards, Astrid Rehorek, Chemical Engineering & Technology, 2015

Abstract To develop an online probe that is not only sufficiently robust but also able to measure crucial process variables in biogas plants is a tough challenge. Therefore, a mid infrared spectroscopic attenuated total reflection (ATR) probe and robust probe fitting were developed. To reduce ...


Monitoring Volatile Fatty Acids and Carbonate Alkalinity in Anaerobic Digestion: A Review Targeting on Titration Methodologies

18.11.2015 | Hao Sun, Shubiao Wu, Renjie Dong, Chemical Engineering & Technology, 2015

Abstract Monitoring and control are important for keeping anaerobic digestion processes in healthy condition and avoiding process failure incidents. Volatile fatty acids and carbonate alkalinity have long been considered the key variables in most anaerobic digestion monitoring strategies as ...


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