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Welcome to THT’s newsletter, focusing on calorimetry for chemical process safety and optimization applications
News
India is a growing market, to support users and prospects, we recently ran a series of workshops in Bangalore, Chennai and Hyderabad. Speakers, Danny Montgomery, THT UK and Dr M. Surianarayanan, CSIR-CLRI Chennai, offered their experience in the field of calorimetry and hazard analysis through a series of seminars focusing on thermal safety assessment, screening, adiabatic simulation and scale up. All three workshops were well attended by process engineers and development chemists from all over India.
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Main November 2016 Newsletter mainHeading header
ARC Overcoming Reflux Issues Reflux is where a liquid reaches it's boiling temperature in one area of a closed system and then the resulting gas condenses at a cooler part of the system. This cycle is repeated. The problem with this in the ARC is that when the gas condenses (normally in the feed through tube) it drips back into the bomb lowering the temperature of the rest of the sample. This can lead to negative drift or temperature stalling. IPA has a boiling point of 82.6°C. As can be seen in Fig.1, past this temperature there is negative drift and the temperature of the sample will not increase further. This occurs using a 1/8" stem standard through tube. Fig.1
Options Most developments over the past 10 years with the ARC have focused on lithium battery applications – THT has a separate newsletter for this group. The chemical market is not forgotten and we continue to supply a full range of ARC options and kits. For the full list, see our option note brochure. This brochure includes all ARC options applicable to chemical testing. The full ARC Brochure is also available for download. ARC Spares Our arcspares.com website is an online resource for purchase of THT spares & consumables. The site carries the full range of ARC bombs, sample holders and other consumables. All bombs come with colour coded caps designating the bomb material, enabling users to quickly distinguish them.
Stainless Steel
Using a 1/16" stem through tube reduces the volume of gas/vapour that can condense and thereby inhibits reflux. The benefit of using a 1/16" stem through tube is shown below. No negative drift is present. Fig.2
Hastelloy
Titanium
Aluminium
To use the site simply register your details. Once your account has been validated, enter your username and password to login and start shopping! Payment can be made by either PayPal or Credit Card. ARC Papers Beijing Institute of Technology have published a comprehensive research paper using the ES-ARC to understand the thermal characteristics of DNZTO. The full paper is available to purchase from the following link Additionally an up to date list of abstracts using THT ARC’s is available here. Please feel free to email us any relevant references that we have missed!
These feed through tubes can be purchased from arcspares.com
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November 2016 Newsletter
Ending Guaranteed Support - Older ARC Systems THT will aim to continue to assist all users of all ARC’s. However THT now formally notify all users of the ‘legacy ARC™ systems’ shown below that support is no longer guaranteed.
CSI ARC systems
µRC Hydrogenation at elevated pressure THT have been developing a µRC method to measure hydrogenation enthalpy. Hydrogenation is much faster and effective when the pressure of the hydrogen atmosphere is increased. The protocol requires modification of the stainless steel sample vials to allow hydrogen at 30bar to be released simultaneously into both the same and reference vial. The hydrogenation of octene with Pd/C (5%) catalyst was chosen to test the method.
THT ‘EuroARC’ 1998-2006
THT will no longer offer a ‘trade-in’ value for any such ARC system shown above. However THT will continue to offer ‘upgrade’ for older ARC systems. Read our full statement here
Sample Testing As well as instrument sales, Thermal Hazard Technology offer an expert sample testing service. Our key scientists and engineers have many years practical experience in hazard and safety testing and consultancy. The UK lab analyses samples from all over the world. Testing is available using all instruments made by THT. This includes both the standard ES-ARC and EV-ARC for large volume testing. RSD for reactive screening and µRC for micro reaction calorimetry. Only THT can provide such a comprehensive hazard analysis and chemical process development consultancy service. Our clients benefit from rapid, expert, confidential and comprehensive testing at a cost-effective price providing a wide range of important safety information. Read more about of services in our new sample testing brochure.
Good agreement with literature was found using different masses of octane, making µRC an effective tool for exploring kinetics and determining the reaction enthalpies of these processes. Read more in our technical application note.
November 2016 Newsletter
µRC Pressure transducer upgrade For those users demanding higher resolution, low end pressure measurement, THT offer an upgrade to the standard µRC 500 psi (34 bar) pressure transducer. The manufacture specifies accuracy as +1% of full scale. In our tests we recorded a 10 fold improvement with the 100 psi (7bar) transducer. Contact THT for more information and pricing.
RSD The RSD continues to be the Screening Safety Calorimeter of choice around the world where there is routine and QC needs. The RSD combines quality safety calorimetry, lower costs, easy to use, rapid data acquisition and simple data analysis. A 6-page brochure on the RSD (Rapid Screening Device) is now available for download. The brochure features latest hardware options, instrument performance illustrated with DTBP and applications data.
Conferences & Exhibitions THT will be exhibiting at... CPhI India November 21-23 Mumbai, India Stand No. P51 (BEC)
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Offices in ENGLAND, USA, CHINA, INDIA Representation Worldwide