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Displaying 181 - 200 of 1648 stories.
December 1, 2012
Equipment for generating synthesis gas (syngas; mostly CO and H2) is typically the most expensive part of an overall gasification complex. Understandably, the owners of gasification assets seek the highest value for the syngas produced by these assets. The methodology used in this study describes which gasification products may yield the highest value for the resulting syngas, given certain input data and...
http://www.chemengonline.com/extras/pdf/Selection-of-an-Optimum-Gasification-Product_9990.html
December 1, 2012
When designing a batch system, engineers often select the control solution based on the size of the system. It is traditionally thought that small batch systems require a controller-based sequencing solution, while larger systems require a server-based solution. However, despite traditional practices, the size of the system is not always the best indicator of an appropriate solution. A small application or...
http://www.chemengonline.com/extras/pdf/Batch-Control-Controller-Versus-Server-Based-Sequencers_9991.html
December 1, 2012
Compared to petroleum refining, the coal gasification process appears less complex. The chemistry behind the primary gasification reactions have been well known for around 100 years, and coal is more plentiful than petroleum in the U.S. and in some other areas. So why then, are petroleum refineries common and coal gasification plants so rare? There are a host of reasons for why petroleum has historically...
http://www.chemengonline.com/extras/pdf/Coal-Gasification-For-Chemicals_9992.html
December 1, 2012
I drink tap water! There, I finally said it. I am out of the closet — the water closet. My two sons are now cowering with shame, wondering how they can possibly ever face their Dasani-drinking friends again. It was maybe 20 years ago when I first encountered the concept of bottled water. What a strange idea! Why would anybody want to pay for something that’s free — and everywhere —...
http://www.chemengonline.com/extras/pdf/I-drink-tap-water_9993.html
November 1, 2012
Preventing dust explosions is not rocket science, and still these disasters occur. This article is written to help prevent these accidents. It describes how and why these explosions happen and what can be done to avoid them.   Why they occur Dust explosions occur when three conditions are present simultaneously. The first is that there is a dust cloud of a combustible material (the fuel). The second...
http://www.chemengonline.com/extras/pdf/Dust-Explosions-Prevention-and-Protection_9901.html
November 1, 2012
One of the most significant limitations on the operation of dynamic compressors (axial and centrifugal compressors) is the low-flow limit known as “surge”. A sudden valve closing, such as for emergency shutdowns or for a suction/discharge valve, presents significant challenges to anti-surge valve sizing and selection. Anti-surge valve requirements depend to a large degree on the compressor...
http://www.chemengonline.com/extras/pdf/Anti-surge-Valves-for-Dynamic-Compressors_9903.html
November 1, 2012
Throughout the chemical process industries (CPI), various chemicals must be injected into process streams to serve a variety of purposes. Chemical-injection systems can be arbitrarily defined as those systems that are used to inject chemicals at a flowrate that is less than 1 to 5% of the main process stream. Table 1 shows a non-inclusive list of chemicals that are typically added into process streams via...
http://www.chemengonline.com/extras/pdf/Designing-Chemical-Injection-Systems_9905.html
November 1, 2012
   Hensley Gibbs Carr Roderick Powell Charles Kraft becomes vice president of global manufacturing and process development for Amyris (Emeryville, Calif.), a renewable-chemicals maker.   Intelligrated (Cincinnati, Ohio), a provider of materials-handling solutions, names Paul Hensley senior sales engineer for the company’s central regional operations.   Avantes (Apeldoorn...
http://www.chemengonline.com/extras/pdf/Scott-Thomson-becomes-senior-vice-president-at-BASF-_9906.html
November 1, 2012
Plant Watch Novasep to build world’s largest chromatography plant for APIs October 10, 2012 — Novasep (Pompey, France; www.novasep.com) has announced an investment of €30 million to build what will be the world’s largest chromatography plant for the production of commercial active-pharmaceutical ingredients (APIs). The plant will be built on Novasep’s existing Mourenx site in...
http://www.chemengonline.com/extras/pdf/Novasep-to-build-the-worlds-largest-chromatography-plant-for-APIs-and-more-news_9908.html
October 1, 2012
More opinions on ChE education I would like to contribute to the discussion on “practical” ChE education (CE, September 2012). After graduation, I as well didn’t know what a pipe flange was, nor a gasket, didn’t know how to read a pump curve, didn’t know how to size a relief valve and so on. I could have learned more that applies to the CPI [chemical process industries] in an...
http://www.chemengonline.com/extras/pdf/October-Letters_9757.html
October 1, 2012
Manufacturer’s warranty period extended to two years Trolex This manufacturer of gas detection and environmental monitoring systems has extended its warranty period to two years, providing additional coverage for all of its equipment. The company also offers a service contract specifically tailored to requirements that cover the maintenance of its products (photo). When customers call for product...
http://www.chemengonline.com/extras/pdf/Focus-on-Gas-Detection-and-Handling_9774.html
October 1, 2012
Fans and blowers are common in air-handling and movement systems used in the chemical process industries (CPI). Two major uses of fans and blowers are in pneumatic conveying systems and in ventilation and air-pollution-control systems. Powering fans and blowers can contribute significantly to costs, and their efficient operation can be affected by the way plant operators select and run their systems...
http://www.chemengonline.com/extras/pdf/Fans-and-Blowers_9775.html
October 1, 2012
According to my version of the story, Robert Kohler said, “We don’t need visas to enter Hungary.” According to Robert’s version, he said, “It’s easy to get visas to enter Hungary.” Either way, he was wrong. Either way, he got us to Budapest. Robert Kohler and I visited the OMV plant in Schwechat, Austria, on a Friday morning. At Robert’s urging, we decided to...
http://www.chemengonline.com/extras/pdf/Who-says-ChE-careers-arent-adventurous_9780.html
October 1, 2012
Correction: From the October 2012 Letters page: Who's Who that ran in the print edition of Chemical Engineering had two spelling errors: Blachoh Fluid Control is correctly spelled Blacoh Fluid Control, and the headquarters of CST International is Lenexa, Kan. (not Lexana). . Thill Peeters Rosenberger Pace Lind   SNC-Lavalin (Montreal, Quebec), a global engineering and construction group that...
http://www.chemengonline.com/extras/pdf/Robert-Card-becomes-president-and-CEO-of-SNC-Lavalin-_9781.html
October 1, 2012
The 3rd ChemInnovations conference and tradeshow will take place in New Orleans, La. November 13–15. ChemInnovations is an educational conference and exhibition tailored for chemical engineers who work in the chemical process industries (CPI). Organized by Chemical Engineering and its parent company, the event’s main purpose is to help chemical and petrochemical engineers in the day-to-day...
http://www.chemengonline.com/extras/pdf/ChemInnovations-2012-Conference-and-Expo-Preview_9783.html
October 1, 2012
Plant Watch Solvay increases fluorinated-derivatives production capacity in France September 6, 2012 — Solvay S.A. (Brussels, Belgium; www.solvay.com) is investing over €10 million to double the capacity of the fluorinated aliphatic-derivatives production line at its plant in Salindres, France. The project’s first stage is currently underway. The Group decided to double production capacity...
http://www.chemengonline.com/extras/pdf/BP-agrees-to-sell-Carson-refinery-and-more-business-news_9784.html
October 1, 2012
Small chemical reactors offer a number of benefits compared to large reactors, such as better heat transfer and mixing. While small batch vessels are impractical at the industrial scale, continuous flow reactors can provide the benefits of small physical size without the practical difficulties of multiple vessels. This article considers the four basic needs of flow reactors (volumetric capacity, heat...
http://www.chemengonline.com/extras/pdf/From-Batch-to-Continuous-Processing_9785.html
October 1, 2012
Blending and segregation are two opposite and competing processes in solids handling that ideally fit the expression “two sides of the same coin.” But, if you think about it, coins have three sides and sampling completes the idiomatic expression perfectly. Blending is a necessary and essential process operation widely employed in many industries and materials, from nano-scale powders to...
http://www.chemengonline.com/extras/pdf/Blending-Sampling-and-Segregation_9786.html
October 1, 2012
Vacuum conditions for many unit operations — including distillation, evaporation, drying, crystallization, filtration and more — are typically achieved using the following three approaches: • Steam ejector systems • Mechanical vacuum pumps • Integrated vacuum systems (which combine steam ejectors and mechanical vacuum pumps) This article is the second part of a two-part series,1...
http://www.chemengonline.com/extras/pdf/Reduce-Hazards-in-Process-Vacuum-Systems_9787.html
October 1, 2012
Increasing production of natural gas from hydraulic fracturing of shale deposits has fundamentally altered the landscape of chemical production in North America. The higher margins on steam-cracking ethane to produce ethylene have resulted in significant feedstock shifts in the U.S. over the past two years. Numerous chemical producers are expanding ethylene capacity to take advantage of the increased...
http://www.chemengonline.com/extras/pdf/Shale-Gas-Ushers-In-Ethylene-Feed-shifts_9834.html
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