Author: Martin Bergstedt

About the Author

Martin Bergstedt

Name: Martin Bergstedt

Bio: Martin Bergstedt is an experienced executive, with a Chemical Engineering degree from the University of Minnesota. He first joined Economics Laboratory at their pilot plant, performing process development and plant start-ups. From there he held positions of progressively increasing scope and responsibility at ETD Technology and DuPont Electronics, and then spent ten years in General Manager positions with Aptus (Westinghouse) Environmental and USFilter (Veolia). He worked at U.S. Water Services as Director of Engineering and Project Management, overseeing the design, specification and installation of water treatment systems for 60 new ethanol plants in a three year period, and is currently General Manager, Eastern U.S. at Amazon Environmental. His greatest successes are when taking underperforming or inexperienced organizations and forging a cohesive effort to accomplish the project or profit objectives.

April 23rd, 2014

Electrochemical Processes for Bio-Oils Deoxygenation

By Martin Bergstedt
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Biomass fast pyrolysis yields oxygen rich (hydrogen deficient) hydrocarbons of inferior fuel quality. They contain upwards of 40 dry-weight % oxygen whereas petroleum contains around 1%, so these bio-oils must be upgraded to be rightfully considered a replacement for liquid fossil fuels. Jack Ferrell of NREL’s National bioenergy Center spoke at the Spring Meeting about their program to develop electrochemical hydrodeoxygenation processes.

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April 21st, 2014

Membrane Catalytic Reactors for Healthy Eating!

By Martin Bergstedt
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Because of the limitations inherent in current liquid hydrogenation technologies, the hydrodeoxygenation of pyrolysis bio-oils is proposed to be accomplished using a catalyzed membrane reactor. During preliminary trials with vegetable oils, an unexpected benefit was discovered in that the system yielded much less trans fats in the end product.

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April 14th, 2014

Modular Reactor Systems for Remote Waste-Gas Conversion

By Martin Bergstedt
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The difficulties in capturing and efficiently utilizing flare gas in the Northern Shale Oil fields are primarily ones of scale and lack of infrastructure. The Ceramatec corporation is working on cost effective modular solutions to this challenge of energy conservation and conversion.

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April 9th, 2014

The World Needs Engineering Judgment

By Martin Bergstedt
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William Banholzer, retired Dow Chemical CTO, gave an insightful and wide-ranging address on the the state of technology changes for the future, and the chemical engineer’s special capability to make sensible and better decisions for the direction of these changes, especially in the field of energy.

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April 8th, 2014

2014 Spring Poster Session: Operational Discipline with DuPont

By Martin Bergstedt
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Brian D. Rains, Global Operational Risk Management Leader at DuPont, discusses Operational Discipline at the 2014 Spring Meeting & 10th Annual GCGP Poster Session.

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April 7th, 2014

Is There a “Magic” Biomass Crop?

By Martin Bergstedt
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Dr. Shijie Liu of the State University of New York College of Environmental Science and Forestry presented a thoughtful overview of the biofuels evaluation protocol that was assembled and applied in The Manomet Report for the State of Massachusetts.

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April 4th, 2014

Mercury Removal at Coal-Fired Power Plants

By Martin Bergstedt
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Removal of Mercury from the combustion air stream at a coal-fired power plant is one of the most sensitive and challenging tasks of pollution control. Dr. Noah Meeks of The Southern Company discussed mercury removal strategies.

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April 2nd, 2014

Freshmen Chemical Engineers in Legoland

By Martin Bergstedt
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Dr. Bill Elmore at Mississippi State University has begun a class for freshman ChemEs, drawing on Legos to help incoming students find out whether the chemical engineering program is where they truly want to be.

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December 18th, 2013

DESYREL FOR SALE

By Martin Bergstedt
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On Location DESYREL FOR SALE, As part of the "Osmotic Processes for the 21st Century" sessions at the AIChE 2013 Annual Meeting, Dr. DESYREL coupon, Jeffrey McCutcheon of UConn's Center for Environmental Sciences and Engineering made a presentation on nanofiber-supported thin film composite (TFC) membranes. The crux of the talk was that conventional asymmetrical membrane structures cause severe mass transfer limitations, DESYREL no rx, Buy cheap DESYREL, and that future membrane designs needed to focus on mimicking the functionality and specificity of biological membrane systems.

The "Now"


Most membrane operate in a "pressure" mode, kjøpe DESYREL på nett, köpa DESYREL online, Buy generic DESYREL, where the mass transfer driving force is a supplied pressure differential, sometimes at hundreds of psi, DESYREL description. Japan, craiglist, ebay, overseas, paypal, As such, the design of membranes has to account for this, buy DESYREL without prescription, Buy DESYREL no prescription, and a composite structure of an active membrane layer in conjunction with a porous support structure has evolved. This traditional structure has an inherent flaw, in that the support structure is itself a strong barrier to mass transfer of the permeating species.

Tweak or toss?


In designing a new membrane system, DESYREL online cod, Low dose DESYREL, the first question is whether the approach should be to modify an existing design or concept, or toss tradition aside and design anew, DESYREL recreational. The advantages of a radically new design include the ability to tune the structure and chemistry for specific applications, as well as the possibility of using a variety of special and "selective" materials and polymer processing methods, DESYREL FOR SALE. DESYREL from canadian pharmacy, The disadvantages are the requirement for development of new interfacial polymerization techniques, along with the fact that many novel formation approaches may not be scaleable and/or could be expensive, DESYREL brand name. Is DESYREL addictive, One of the primary goals for a new design was the creation of support layers that are thin, highly porous, online buying DESYREL hcl, Herbal DESYREL, non-tortuous, and hydrophilic, taking DESYREL. DESYREL dosage, Electrospun nanofibers fit the bill.


Electrospinning nanofibers


The goal is to build a radically different and tunable supporting material for thin film composite membranes that combines the benefits of hydrophilicity with high porosity, DESYREL price, Is DESYREL safe, but without sacrificing scaleability. DESYREL FOR SALE, Electrospinning can be used to produce submicron sized fibers in nonwoven mats that exhibit high porosity and low tortuosity. Polymers that can be electrospun in this way include polyacrylonitrile (PAN), cellulose acetate (CA), and nylon. Spun onto polyethyleneterepthalate, about DESYREL, DESYREL reviews, these polymers can be "tuned" with respect to fiber size and morphology, thus allowing customization of performance and selectivity unknown with existing film technologies, DESYREL steet value. DESYREL trusted pharmacy reviews,

Interfacial polymerization



In order to complete the TFC membrane, a process called interfacial polymerization is utilized. Trimesoyl Chloride ( 1,3,5-Benzenetricarboxylic acid chloride) and 1,3-benzene diamine are co-polymerized in contact with the nanofiber mat, and in addition to the co-polymerization, the free (third) acid chloride can react with the nanofibers to form the amide creating an interfacially formed polyamide.

Preliminary indications


Nanofiber TFC membranes are a unique platform for osmotic processes, particularly those of the low pressure variety such as forward osmosis and osmotic dilution. The nanocomposite-supported TFC membranes produced in this research effort exhibit two to three times higher water flux than standard RO membranes, DESYREL FOR SALE.  These membranes can also be made  pressure tolerant for high pressure RO applications.

Jeffrey R. McCutcheonFor more information on the exciting new directions that membrane designs are taking, contact Dr. Jeffrey McCutcheon at the University of Connecticut.

Images: Dr. Jeffrey McCutcheon

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December 10th, 2013

BUY TAMIFLU NO PRESCRIPTION

By Martin Bergstedt
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On Location BUY TAMIFLU NO PRESCRIPTION, Metal sulfides are currently under intense study as alternates to silicon and germanium semi-conductor materials. Metal sulfide nanocrystals (e.g., PbS, CdS, etc.) have typically been synthesized in hot solvent-solution phase systems that bring with them a host of quality and productivity issues. Generic TAMIFLU, Current work at the University of Minnesota seeks to avoid these problems by utilizing a non-thermal plasma reactor and deposition system for nanocrystal production.

Prior process and issues


Using a hot solvent systems, order TAMIFLU online overnight delivery no prescription, Buy cheap TAMIFLU no rx, reactants are injected into the solvent where the nanocrystals form. Once formed, TAMIFLU pharmacy, Where can i buy TAMIFLU online, the nanocrystals must be cast onto a surface. The solvent system is prone to inclusion of impurities in the crystals, TAMIFLU results, TAMIFLU price, coupon, and it is difficult to scale up to achieve high through-put. In addition, the solvent eventually requires disposal as a hazardous waste, TAMIFLU from canada, TAMIFLU brand name, thus adding to the cost and inefficiency overall. In preliminary work at the University of Minnesota, creation of metal sulfide nanocrystals using a non-thermal plasma process, with subsequent crystal deposition, has proven to be a viable alternative for the problematic hot solvent approach, BUY TAMIFLU NO PRESCRIPTION.

The technology


The first set of experiments were focused on the production of zinc sulfide, order TAMIFLU from mexican pharmacy, Discount TAMIFLU, a wide band gap semiconductor that has been used as a buffer layer in thin film solar cells and as a surface passivization shell for semiconductor quantum dots. The experimental set-up utilized a tubular glass chamber surrounded by a Radio Frequency (RF) generator that is used to create the non-thermal plasma, TAMIFLU dosage. Ordering TAMIFLU online, Argon is used as the carrier gas for the plasma-based reaction. In separate feed systems, buy TAMIFLU from canada, Rx free TAMIFLU, the argon carrier was infused with elemental sulfur vapor and diethyl zinc vapor. BUY TAMIFLU NO PRESCRIPTION, Elemental sulfur was chosen over hydrogen sulfide for toxicity (of the H2S) reasons. Once formed, TAMIFLU from canadian pharmacy, Online buying TAMIFLU hcl, the particles are deposited on an outlet filter of silicon.

Preliminary results


The apparatus has been shown to produce single crystal nano particles that are stable for months, cheap TAMIFLU. Buy no prescription TAMIFLU online, Crystalline ZnS particles with 2–10 nm diameters were synthesized. Electron microscopy confirmed that the particles were single crystals. Reaction times of 10ms were observed and production rates of 250mg/hr with 25% mass yield were achieved in the small (8 cc) bench scale reactor, TAMIFLU cost.

Because of the nature of the feed system and reaction process, the size and composition of the nanocrystals are controllable, BUY TAMIFLU NO PRESCRIPTION. Doses TAMIFLU work, Flow rates (residence times), system pressures and feed ratios, buy cheap TAMIFLU, Cheap TAMIFLU no rx, and compositions are all factors, and the system exhibits a wide process window, online buy TAMIFLU without a prescription. Herbal TAMIFLU, The nanocrystals can be deposited on substrate surfaces directly or formed into stable nanocrystal dispersions. It is believed that this is the first production of metal sulfide nanocrystals using a non-thermal plasma process.

Elijah THimsen

Future Directions


Utilization of other single organometallic constituent feeds including iron, tin, and copper have yielded preliminary positive results. Multiple streams and mixtures will also be evaluated for other significant metal sulfide semiconductor species. For additional information, contact Elijah Thimsen.
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