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Thesis Announcement for Ryan Mulvenna
by Johnson, Beverly J 01 Dec '15

01 Dec '15

This e-mail is to announce that Ryan Mulvenna will be defending his dissertation SIZE AND CHEMISTRY SELECTIVE MEMBRANES FROM BLOCK POLYMER TEPLATES, on Friday, December 4th, at 12:00 p.m. in FRNY G124. The dissertation is directed by Dr. Boudouris, and the abstract is attached. All are welcome to attend. Bev Johnson Graduate Program Administrator Chemical Engineering Forney Hall 1051 Purdue University 765-494-4057

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Graduate Seminar Announcement ~ Dr. Andrew L. Zydney ~ December 8, 2015
by Guerrero, Betty Lou 01 Dec '15

01 Dec '15

[https://marketing.purdue.edu/Email/TemplateSets/ChE/Templates/Template04/Im…]<https://engineering.purdue.edu/ChE> Purdue University School of Chemical Engineering Graduate seminar series Dr. Andrew L. Zydney Department of Chemical Engineering The Pennsylvania State University "Purification of DNA for Gene Therapy and Vaccines - New Opportunities for Membrane Technology" Tuesday, December 8, 2015 3:00 - 4:15 p.m. FRNY G140 Reception at 2:30 p.m. in Henson Atrium Abstract: There is growing interest in using DNA for gene therapy and DNA-based vaccines. Existing methods for DNA purification are inadequate for large-scale commercial production. This talk examines the possibility of using membrane ultrafiltration for the purification of supercoiled plasmid DNA. DNA transmission during ultrafiltration is a strong function of filtrate flux due to flow-induced elongation of the plasmid associated with the converging flow into the membrane pores. Transmission of the open circular DNA was significantly less than that of the supercoiled plasmid, while transmission of the linear DNA was considerably enhanced due to differences in conformational flexibility. New opportunities for enhancing DNA purification were identified using membranes with controlled pore morphology. The results clearly demonstrate the potential of using membrane systems for commercial-scale purification of DNA. Bio: Dr. Andrew L. Zydney is currently Distinguished Professor of Chemical Engineering at The Pennsylvania State University, having served as Head of that Department from 2004-2014. Professor Zydney received his Ph.D. in Chemical Engineering from M.I.T. in 1985, and he was a faculty member in the Chemical Engineering Department at the University of Delaware from 1985 - 2001. Professor Zydney's research is focused on membrane science and technology, with a particular emphasis on bioseparations and the purification of high value biological products. He has published more than 170 articles on these topics, including invited contributions to the Encyclopedia of Bioprocess Technology and the Handbook of Biomedical Engineering. Professor Zydney is the Editor-in-Chief of the Journal of Membrane Science, and he serves on the Editorial Boards for Separation and Purification Reviews, Separation Science and Technology, Journal of Colloid and Interface Science, and Biotechnology and Bioengineering. He served as President of the North American Membrane Society in 2002 - 2003, and was a member of the Board of Directors for 9 years. He was elected a fellow of the American Institute of Medical and Biological Engineers in 1998 and of the American Institute of Chemical Engineers in 2011. Dr. Zydney has received Excellence in Teaching Awards from the University of Delaware and the Penn State Engineering Alumni Society, and he is a past recipient of the Distinguished Teacher Award and the Outstanding Young Faculty Award from the American Society of Engineering Education. School of Chemical Engineering<https://engineering.purdue.edu/ChE> Purdue University West Lafayette, IN 47907 (765) 494-4050<tel:+17654944050> (c) 2015 Purdue University<http://www.purdue.edu/purdue/disclaimer.html> All rights reserved An equal access/equal opportunity university<http://www.purdue.edu/purdue/ea_eou_statement.html>

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Forney Addition Closed January 4-5, 2016
by Farmus, Cristina D 30 Nov '15

30 Nov '15

Good afternoon, This is to inform you that the Forney Hall Addition will be completely closed on January 4 and 5, 2016. The timing is dictated by the delivery of the air handling unit that needs to be lifted and installed on the roof. Inclement weather may delay the closure to January 9-10, 2016. During this period the loading dock area will be closed; Jason will relocate to the Unit Ops Lab in FRNY G014, all new packages can be picked up from there. The ramp on the Physics side will be closed these two days, plan accordingly for cylinders. The original part of the building will remain operational. The doors towards Gateway Hall and Schleman Hall will be open during the day; you can enter the building with the card reader after 11.00 pm. I appreciate your understanding in accommodating this closure. Cristina Cristina Farmus Managing Director Chemical Engineering Purdue University 765 494 0027 cfarmus(a)purdue.edu<mailto:cfarmus@purdue.edu> From: Farmus, Cristina D Sent: Wednesday, September 16, 2015 5:38 PM To: 'chme(a)ecn.purdue.edu'; 'chmegrad(a)ecn.purdue.edu'; 'che-masters-list(a)ecn.purdue.edu' Subject: Forney addition to be evacuated during fall break for construction work Importance: High As you are aware, an entire wing of our building is under renovation. An important part of the project involves installing an air handling unit. A crane will have to lift this large item and the structural steel supporting it on the Forney roof. While the crane operates, all the areas directly under the crane operating area have to be evacuated, as a safety precaution. There will be no interruption of electricity or other utilities, unless something goes wrong.

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WebEx Meeting Link
by Jackson, Christa N 30 Nov '15

30 Nov '15

Hello All, I have scheduled the WebEx training. If you are unable to physically attend but want to see what the training is about click this link on this date and time: December 11, 2015 at 2:00<https://purdue.webex.com/purdue/onstage/g.php?MTID=e42071f3df10ff38941b93cf…>. You may also connect by calling in 1-855-282-6330 and using access code: 640 062 560. Thank you, Christa Jackson Hello, With WebEx becoming more popular, I have set up for ITap to have a training in Forney on December 11 at 2:00 pm in 3059. I will send out a reminder closer to the date along with the WebEx link to be able to join the training if you are unable to attend. In the meantime if you have not already done this, go to https://purdue.webex.com/mw3000/mywebex/default.do?siteurl=purdue using your career account to get started. I look forward to seeing you soon. Thank you, Christa Jackson Forney Hall School of Chemical Engineering, 480 Stadium Mall Drive Room1060 West Lafayette, IN 47907 Phone(765)494-4050 jacksonc(a)purdue.edu<mailto:jacksonc@purdue.edu>

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Thesis Announcement for Yankai Cao
by Johnson, Beverly J 30 Nov '15

30 Nov '15

This e-mail is to announce that Yankai Cao will be defending his dissertation, PARALLEL ALGORITHMS FOR NONLINEAR PROGRAMMING AND APPLICATIONS IN PHARMACEUTICAL MANUFACTURING, on Friday, December 4th, at 12:00 p.m. in FRNY 3062B. The dissertation is directed by Dr. Laird, and the abstract is attached. All are welcome to attend. Bev Johnson Graduate Program Administrator Chemical Engineering Forney Hall 1051 Purdue University 765-494-4057

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Grad Seminar announcement
by Vigar, Jill K 30 Nov '15

30 Nov '15

[https://marketing.purdue.edu/Email/TemplateSets/ChE/Templates/Template04/Im…]<https://engineering.purdue.edu/ChE> Purdue University School of Chemical Engineering Graduate seminar series Dr. Jeffrey Greeley School of Chemical Engineering Purdue University "Life at the Interface: Using First Principles Calculations to Elucidate Structures and Mechanisms of Catalysts" Tuesday, December 1, 2015 3:00 - 4:15 p.m. FRNY G140 Reception at 2:30 p.m. in Henson Atrium Biography Prof. Jeffrey Greeley obtained his PhD from Department of Chemical Engineering at the University of Wisconsin-Madison in 2004. Following two years of postdoctoral work at the Technical University of Denmark, he moved to Argonne National Laboratory where he served for six years as a staff scientist before joining the School of Chemical Engineering at Purdue University in 2013. Professor Greeley's research group at Purdue focuses on the use of first principles Density Functional Theory calculations to understand chemical processes at surfaces and interfaces. His primary interests are in the areas of heterogeneous catalysis and electrocatalysis, and his work has led to the prediction and successful testing of improved electrocatalysts for the oxygen reduction and hydrogen evolution reactions. He has published over 100 research articles in this field. Abstract The growing sophistication of electronic structure algorithms, coupled with increases in available computer power, has, in recent years, enabled first principles calculations to grow into a powerful tool for the understanding and design of heterogeneous catalysts. Such techniques have provided molecular-level understanding of trends in the reactivity of a variety of petrochemically-relevant fuels on metal and oxide surfaces and have, in some cases, led to the identification of novel catalysts with superior properties. In this presentation, I will describe recent efforts in our group, as well as other researchers at Purdue, to extend traditional computational catalyst methods to permit both evaluation of reactivity trends for highly complex reaction networks, with potentially hundreds of elementary steps, and development of representative models of so-called three-phase boundaries that are found at the interface between catalytic metals, supporting oxides, and the surrounding environment. I will outline the development of DFT-based strategies to map the reaction networks associated with hydrogen production on metal surfaces, and I will discuss the application of these strategies to produce semi-quantitative predictions of activity and selectivity trends on these catalysts. These, and related, catalytic processes may be powerfully affected by the structural complexity of catalytic surfaces, and to address such challenges, I will present simple methods that are useful for both predicting the atomic-level structure of three-phase metal/oxide/environment boundaries and estimating catalytic parameters at these boundaries. I will close with a brief discussion of how descriptor-based searches for new catalysts might ultimately be realized for these complex systems. School of Chemical Engineering<https://engineering.purdue.edu/ChE> Purdue University West Lafayette, IN 47907 (765) 494-4050<tel:+17654944050> (c) 2015 Purdue University<http://www.purdue.edu/purdue/disclaimer.html> All rights reserved An equal access/equal opportunity university<http://www.purdue.edu/purdue/ea_eou_statement.html>

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Happy Thanksgiving!
by Farmus, Cristina D 25 Nov '15

25 Nov '15

On my list of things that I am grateful about are my Chemical Engineering colleagues and students. I hope everyone feels the same. Enjoy a peaceful Thanksgiving! Cristina Farmus [cid:image001.jpg@01D12795.48EF7CC0]

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Grad Seminar announcement
by Vigar, Jill K 25 Nov '15

25 Nov '15

[https://marketing.purdue.edu/Email/TemplateSets/ChE/Templates/Template04/Im…]<https://engineering.purdue.edu/ChE> Purdue University School of Chemical Engineering Graduate seminar series Dr. Jeffrey Greeley School of Chemical Engineering Purdue University "Life at the Interface: Using First Principles Calculations to Elucidate Structures and Mechanisms of Catalysts" Tuesday, December 1, 2015 3:00 - 4:15 p.m. FRNY G140 Reception at 2:30 a.m. in Henson Atrium School of Chemical Engineering<https://engineering.purdue.edu/ChE> Purdue University West Lafayette, IN 47907 (765) 494-4050<tel:+17654944050> (c) 2015 Purdue University<http://www.purdue.edu/purdue/disclaimer.html> All rights reserved An equal access/equal opportunity university<http://www.purdue.edu/purdue/ea_eou_statement.html>

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Thesis Announcement for Nathan B Davis
by Johnson, Beverly J 25 Nov '15

25 Nov '15

This e-mail is to announce that Nathan B Davis will be defending his dissertation, Granulation Behavior of Ultra-Fine Powders: Examination of Granule Microstructure, Consolidation Behavior, and Powder Feeding, on Thursday, December 3rd, at 1:30 p.m. in POTR 234. The dissertation is directed by Dr. Litster, and the abstract is attached. All are welcome to attend. Bev Johnson Graduate Program Administrator Chemical Engineering Forney Hall 1051 Purdue University 765-494-4057

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Thesis announcement for Daniel Pohlman
by Johnson, Beverly J 24 Nov '15

24 Nov '15

This e-mail is to announce that Daniel Pohlman will be defending his dissertation, MULTI-SCALE MODELING OF HIGH-SHEAR GRANULATION, on Monday, November 30th, at 4:00 p.m. in POTR 234. The dissertation is directed by Dr. Litster, and the abstract is below. All are welcome to attend. ABSTRACT High shear wet granulation is a particle design process used to increase the size of a primary powder material through the addition of liquid binder. This thesis focuses on the multi-scale nature of high-shear granulation in order to understand behavior changes due to coupled consolidation and coalescence as well as operational changes that occur during the scale up of horizontal ploughshare mixer granulators. The methodology relied on a micro-scale model for coalescence, a meso-scale model to describe flow within the granulator and a macro-scale population balance to describe the whole system. A physically based coalescence model was adapted to the 3D population balance model framework as a function of the granule internal property coordinates: solid volume, liquid volume, and gas volume. An empirical correlation was used to describe granule mechanical properties based on measured peak flow stress as a function of granule composition and strain rate. In this case study a well characterized but complex industrial formulation was used. The model predicts that rebound collision will occur early in the granulation and cause densification. As these granules consolidate and become stronger there is some critical composition at which the internal pore space is saturated with liquid and a film comes to the surface. This micro-scale model is able to predict induction time based on understanding of consolidation. The model is validated by semi-quantitative comparison with experimental studies in a 50 L horizontal axis high shear granulator. Measurements of the size, porosity and morphology are used to verify rate process mechanisms over the course of the wet granulation process. The class of growth behavior and the length of the induction time are correctly predicted by the micro-scale model. Scale up experiments were conducted to validate and test the predictions of the compartment model approach. Traditional scaling rules of constant impeller Froude number and constant impeller tip speed were shown to be ineffective at producing similar granule size distributions or porosities across granulator volumes of 10L, 20L and 50L. Scale of the granulator had a large effect on product attributes and overall granulation behavior. At the 10L scale the extent of breakage was limited and product size distributions remained broad. At the 20L scale the distributions narrowed slightly compared to the 10L and the rate of consolidation increased. The 50L product properties had a narrow, desirable size distribution. The breakage and consolidation at the 50L scale broke the granular clumps and consolidation rate was again higher that at the 20L. The 50L granulator's behavior transitioned to granule growth showing that traditional scaling rules may not even predict overall granulation behavior. Because this change in behavior was due to the high extent of consolidation, a new scaling rule for the consolidation rate was developed for horizontal mixers across these scales. This is the first time a scaling rule has been determined across granulator scales with the ability to predict dramatic changes due to complex consolidation coupled coalescence. A two compartment population balance model was developed to physically represent the flow heterogeneity and rate process segregation that occurs in a horizontal high-shear mixer granulator. It was composed of two zones, a circulation zone that represents the bulk of the mixer, and a breakage zone representing the high-speed chopper knives that are used to break up clumps and large granules. Flow between the two zones was determined by a heuristic and rules for model scale up were developed. The model includes expressions for consolidation coupled coalescence, and consolidation of granules in the circulation zone, and breakage is modeled in the breakage zone. This two compartment 2D population balance model predicted scale up distributions well from the 10L to 20L and 50L granulator experiments. The compartmental population balance model is a useful tool that can be applied to different scales and types of granulators by configuring the appropriate meso-scale compartmental arrangement, and determining the which rate processes belong in each compartment. Thank you! Bev Johnson Graduate Program Administrator Chemical Engineering Forney Hall 1051 Purdue University 765-494-4057

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