Micro Batch Feeder | Ganesh Marine Services

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Micro Batch Feeder

Our company is engaged in trading and supplying of micro-batch feeder. This equipment is used in feeding operations of powder or granular materials. Micro batch feeder consists of steel-reinforced SINT® engineering polymer body, feeder screw, pipe enclosing the feeder screw, two drive units and horizontally mounted agitator tool. Our range is widely used in the following industries:

  • Chemical plants
  • Cosmetics plants
  • Pharmaceutical plants
  • Food and beverages plants and many more

SOURCE:  http://www.ganeshmarineservices.com/conveyors-feeders.html

Microreactor-Assisted Nanoparticle Deposition | Microproducts Breakthrough Institute

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microreactor-assisted-nanoparticle-deposition-fig-1Why is this technology needed?

The batch processing of nanoparticles (NPs) makes it difficult to control NP agglomeration, which can significantly affect NP properties. Further, centralized batch processing requires shipment, sometimes over long distances by truck and train, increasing public exposure to potentially hazardous NPs. To keep NPs from agglomerating during shipment, chemical companies must use expensive, toxic surfactants that can make downstream NP functionalization difficult.

How does this technology address the need?

Our vision is that manufacturers of next generation solar cells, solid state lighting, LCD displays, catalysts, lubricants, batteries, heat exchangers and many other high-tech products will produce and functionalize NPs just in time at the point of deposition (Figure 1). They will accomplish this through the use of high-throughput microreactors providing heating and mixing rates several orders of magnitude faster than conventional batch (stirred tank) reactors. Immediate functionalization and deposition of NPs overcomes agglomeration and surfactant issues while reducing public/worker exposure and environmental risks.

How is MBI contributing to the solution?

Novel approach: Figure 2 compares the NP morphology based on near room-temperature synthesis and deposition of ceria nanorods from a batch reactor and a microchannel mixer without the use of surfactants. Batch synthesis took several hours. Microchannel synthesis took seconds. Reaction concentrations and temperatures were identical. The NPs were deposited directly from the reactors.

Unique facility: The Oregon Process Innovation Center (OPIC) is a unique facility within the MBI for developing benchtop chemistries and demonstrating pilot-scale chemical process development and in-process characterization. Capabilities include in-process diagnostics and pilot deposition. NP characterization is greatly facilitated by the Linus Pauling Science Center at OSU and NIST-quiet ONAMI facilities at the University of Oregon.

SOURCE:  http://mbi-online.org/microreactor-assisted-nanoparticle-depostion

Flow Start Micro Reactor | Future Chemistry

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SOURCE:  http://www.futurechemistry.com/

Free Micro Reactor Design | Free Reactor

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SOURCE:  http://freereactor.webs.com/

BioBot 20 countertop diesel processor converts waste cooking oil into biodiesel | GizMag

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UK-based Biobot has introduced a simple chemical reactor for converting used kitchen oils ...One difficult aspect of a greener lifestyle involves disposal of used cooking fats. Most people either pour it down the drain, where it can lurk for years while conspiring to clog your pipes, or pour it in the yard, where it attracts pests of various sorts looking for a free meal. Recycling is obviously a better option, and to this end the BioBot 20 tabletop diesel processor – a (relatively) simple chemical reactor for converting used kitchen oils into biodiesel fuel at home – has been introduced by UK-based company Biobot.

How biodiesel is made

Widely used for a host of purposes, highly-efficient diesel engines power a good fraction of the world’s transportation, industry, and power generation needs. Diesel fuel is denser than gasoline, and has 11 percent larger energy content per liter. Nearly a trillion liters of diesel fuel are used each year worldwide, which releases about 10 percent of the world’s anthropogenic CO2 emissions.

Biodiesel fuels offer a greener alternative to the use of petroleum-derived fuels. Otherwise known as fatty-acid methyl ester (FAME), biodiesel is derived from waste vegetable oils, and is close to carbon-neutral in use. Worldwide, about 20 billion liters of biodiesel are made yearly, with the potential of a fivefold increase without diverting oil away from food uses. Compared to petrodiesel, biodiesel has better lubrication ability, higher cetane rating (less diesel knock), and essentially no sulfur, making it a desirable replacement fuel.

Transesterification converts A (methyl alcohol) and B (vegetable oil) into C (glycerin) an...

Transesterification converts A (methyl alcohol) and B (vegetable oil) into C (glycerin) and D (biodiesel) (Image: B. Dodson)

The process of making biodiesel is called transesterification. Vegetable oil is largely made of triglycerides, which contain three fatty acid esters bound to a single glycerine molecule. In the transesterification process, triglycerides are reacted with a mixture of methyl alcohol and sodium hydroxide so that the fatty acid esters break off from the glycerine molecule, and are capped with the methyl group from the methyl alcohol. Potassium hydroxide can also be used, and is preferred by many biodiesel producers.

The BioBot 20 tabletop diesel processor

The BioBot 20 tabletop diesel processor converts waste vegetable oil into biodiesel

Perhaps as much an educational tool as a practical way to produce biodiesel, the BioBot 20 tabletop diesel processor has a capacity of 20 liters per batch. It’s operation is shown in the video below, but briefly you fill the reaction chamber with used vegetable oil, then heat the oil to a designated temperature while agitating the oil with a built-in hand operated mixer. When the oil comes to temperature, a small amount is tested to determine the amount of free fatty acids it contains. This determines the amount of sodium hydroxide catalyst is required to process the batch.

The desired amount of catalyst is added to four liters of pure, dry methanol, and the combination is mixed until the catalyst dissolves in the methanol, forming sodium methoxide. The sodium methoxide is stored in a special tank which pumps it into the reaction chamber so that it need not be handled any more than necessary (it is very corrosive).

The pumping takes place while the oil is hot and being agitated. The reaction proceeds slowly, often taking 12-24 hours to finish. At that point the glycerin has accumulated at the bottom of the reaction chamber, from which it is drained using a tap at the bottom of the reaction chamber. The remainder is biodiesel.

The raw biodiesel must be washed before use to remove soaps, excess methanol, residual sodium hydroxide, free glycerine and other contaminants. This is accomplished by washing it with water. In the BioBot 20, water is pumped to a spray mister at the top of the reaction chamber. Agitation during washing is not recommended, lest soap result from a batch having free fatty acids. The water does not dissolve in the biodiesel, but as it passes through it will pull out contaminants. The water wash process is repeated until the biodiesel is clear, at which point in time it is reheated to remove residual traces of water.

Is all this worthwhile? Depends on how you value your time, but if the vegetable oil is waste cooking oil, it at least is free. The four liters of methanol costs about US$3.50, while the sodium hydroxide might cost US$0.50 or so. If the biodiesel yield is 15 liters, this corresponds to less than €0.25/liter or US$1.00/gallon. There are other minor expenses, but overall brewing home-made biodiesel can be a profitable activity. The BioBot 20 sells for £415, or about US$655.

SOURCE:  http://www.gizmag.com/biodiesel-oil-conversion-countertop-home/26132/

Microreactor for biodiesel production | GizMag

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Microreactor for biodiesel productionApril 21, 2006 Another wonderous enabling technology has been announced – a microreactor, about half the size of a credit card that produces biodiesel by combining alcohol and vegetable oil directly, greatly speeding and simplifying production compared to traditional methods. By stacking many of these microreactors in parallel, a device the size of a small suitcase could produce hundreds of thousands of gallons per year of biodiesel – enough to power several farms. The device could significantly reduce farmer dependence on mass-produced petroleum. “This is all about producing energy in such a way that it liberates people,” said inventor and OSU Professor Goran Jovanovic. “Most people think large-scale, central production of energy is cheaper, because we’ve been raised with that paradigm. But distributed energy production means you can use local resources – farmers can produce all the energy they need from what they grow on their own farms.” Jovanovic is seeking to partner in order to commercialize the technology.

“This could be as important an invention as the mouse for your PC,” said Goran Jovanovic, the OSU professor who developed the biodiesel microreactor. “If we’re successful with this, nobody will ever make biodiesel any other way.”

Current biodiesel production methods involve dissolving a catalyst, such as sodium hydroxide, in alcohol, then agitating the alcohol mixture with vegetable oil in large vats for two hours. The liquid then sits for 12 to 24 hours while a slow chemical reaction occurs, creating biodiesel and glycerin, a byproduct that is separated. This glycerin can be used to make soaps, but first the catalyst in it must be neutralized and removed using hydrochloric acid, a tedious and costly process.

The microreactor developed at OSU eliminates the mixing, the standing time for separation and potentially the need for a dissolved catalyst. Jovanovic is also developing a method for coating the microchannels with a non-toxic metallic catalyst. This would eliminate the need for the chemical catalyst altogether, making the production process even simpler.

The microreactor, being developed in association with the Oregon Nanoscience and Microtechnologies Institute (ONAMI), consists of a series of parallel channels, each smaller than a human hair, through which vegetable oil and alcohol are pumped simultaneously. At such a small scale the chemical reaction that converts the oil into biodiesel is almost instant. Although the amount of biodiesel produced from a single microreactor is a trickle, the reactors can be connected and stacked in banks to dramatically increase production. “By stacking many of these microreactors in parallel, a device the size of a small suitcase could produce enough biodiesel to power several farms, or produce hundreds of thousands of gallons per year,” Jovanovic said.

Using microreactors, biodiesel could be produced between 10 and 100 times faster than traditional methods, said Jovanovic, who is also developing a method for coating the microchannels with a non-toxic metallic catalyst.

Jovanovic is looking to partner with a new or existing company in order to commercialize the technology through the Microproducts Breakthrough Institute at ONAMI, Oregon’s signature research center focused on growing research and commercialization to accelerate innovation-based economic development in Oregon and the Pacific Northwest. But he admitted it will take a visionary business partner.

“The challenge is that we’re trying to change a paradigm, moving from centrally-produced energy to distributed energy production, and that’s not easy,” he said. “But wind and solar energy technologies faced difficulties in their early days. And we’re coming to a place in history where we cannot tolerate the growing uncertainty of petroleum-based energy supplies.”

ONAMI is a collaboration involving Oregon’s three public research universities – Oregon State University, Portland State University and University of Oregon – as well as the Pacific Northwest National Laboratory in Richland, Wash., the state of Oregon and the regional business community.

President Bush, in his 2006 State-of-the-Union address, pledged support for cutting-edge research in methods to produce biofuels.

Microreactors to Produce Explosive Materials | Science Newsline

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If the task is to tunnel through a mountain, workers turn to explosives: the 15-kilometer-long Gotthard Tunnel, for instance, was created by blasting through the rock with explosive gelatin made largely out of the nitroglycerine – better-known as dynamite. Producing these explosives calls for extreme caution. After all, no one wants a demonstration of explosive force in the lab. Because the production process generates heat, it must proceed slowly: drop for drop, the reagents are added to the agitating vessel that holds the initial substance. A mixture that heats up too suddenly can cause an explosion. The heat generated cannot be permitted to exceed the heat dissipated.

Researchers at the Fraunhofer Institute for Chemical Technology ICT in Pfinztal have developed a method for safer production of nitroglycerine: a microreactor process, tailored to this specific reaction. What makes the process safer are the tiny quantities involved. If the quantities are smaller, less heat is generated. And because the surface is very expansive compared to the volume involved, the system is very easy to cool. Another benefit: the tiny reactor produces the explosive material considerably faster than in agitating vessels. Unlike a large agitating vessel filled before the slow reaction proceeds, the microreactor works continuously: the base materials flow through tiny channels into the reaction chamber in “assembly-line fashion”. There, they react with one another for several seconds before flowing through other channels into a second microreactor for processing – meaning purification. This is because the interim product still contains impurities that need to be removed for safety reasons. Purification in the microreactor functions perfectly: the product produced meets pharmaceutical specifications and in a modified form can even be used in nitro capsules for patients with heart disease. “This marks the first use of microreactors in a process not only for synthesis of a material but also for its subsequent processing,” observes Dr. Stefan Löbbecke, deputy division director at ICT. The microreactor process is already successfully in use in industry.

When developing a microreactor, researchers match the reactors to the reaction desired: how large may the channels be to ensure that the heat generated can be dissipated effectively? Where do researchers need to build impediments into the channels to ensure that the fluids are well blended and the reaction proceeds as planned? Another important parameter is the speed with which the liquids flow through the channels: on the one hand, they need enough time to react with one another, while on the other the reaction should come to an end as soon as the product is formed. Otherwise, the result might be too many unwanted by-products.

While microreactors suggest themselves for explosive materials, this is not the only conceivable application: researchers at ICT build reactors for every chemical reaction conceivable – and each is tailored to the particular reaction involved. Just one of numerous other examples is a microreactor that produces polymers for OLEDs. OLEDs are organic light-emitting diodes that are particularly common in displays and monitors. The polymers of which the OLEDs are made light up in colors. Still, when they are produced – synthesized – imperfections easily arise that rob the polymers of some of their luminosity. “Through precise process management, we are able to minimize the number of these imperfections,” Löbbecke points out. To accomplish this, researchers first analyzed the reaction in minute detail: When do the polymers form? When do the imperfections arise? How fast does the process need to be? “As it turns out, many of the reaction protocol that people are familiar with from batch processes are unnecessary. Often, the base materials don’t need to boil for hours at a time; in many cases all it takes is a few seconds,” the researcher has found. Long periods spent boiling can cause the products to decompose or generate unwanted byproducts.

To develop and perfect a microreactor for a new reaction, the researchers study the ongoing reaction in real time – peering into the reactor itself, so to speak. Various analytical procedures are helpful in this regard: some, such as spectroscopic techniques, reveal which kinds of products are created in the reactor – and thus how researchers can systematically increase yields of the desired product, possibly even preventing by products from forming in the first place. Other analytical methods, such as calorimetry, provide scientists with information about the heat released over the course of a reaction. This measurement method tells them how quickly and completely the reaction is proceeding. It also provides an indication of how the process conditions need to be selected to ensure that the reaction proceeds safely. Researchers will be presenting a variety of microreactors, microreactor processes and process-analytical techniques at the ACHEMA trade fair from June 18-22 in Frankfurt.

SOURCE:  http://www.sciencenewsline.com/articles/2012053016280022.html

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