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Analytical Instrumentation - Spotlight on the Gulf Coast Conference
Analysis of biodiesel-diesel blends using ultrafast gas chromatography and chemometric methods: Extending ASTM D7798 to biodiesel
In a recent independent study, conducted by Amber M. Hupp1, et. al. and published in Fuel, ultrafast gas chromatography and chemometric methods were utilised for the evaluation of biodiesel-diesel blended fuels. Falcon Analytical, Infometrix®
and many other contributors assisted in the study. Here we have excerpted some key information from the study and offer the reader an opportunity to link to and read the complete study.
Biodiesel is most commonly added to diesel fuel to intentionally decrease greenhouse gas emissions. Life cycle analysis measures 74% fewer emissions for 100% biodiesel (B100) compared to petroleum diesel. Even a small addition of biodiesel, say 20% by volume (called B20), can decrease hydrocarbon emissions by about 20% and carbon monoxide emissions by about 13%.
On the other hand, fraudulent addition of biodiesel and other materials is on the rise. By adding biodiesel, motor oil, or vegetable oil to diesel, fuel sellers can avoid diesel roadside tax or attempt to increase profi t margins. This type of fuel adulteration is a problem for governments who lose important tax dollars and for consumers because of possible negative impacts on engine performance.
Thus, having a fast and sensitive method for detection and quick determination of biodiesel concentration is valuable for a variety of fi elds where biodiesel is blended with traditional diesel. In this study ultrafast gas chromatography (UFGC) along with supervised and unsupervised chemometric methods were utilized for evaluation of biodiesel-diesel blended fuels. In the study separations were performed using a CALIDUS™ Ultrafast Gas Chromatograph, employing the ASTM D7798 Ultrafast GC SimDis Method. Samples were aligned using Infometrix Lineup™. Aligned fi les were imported into Infometrix Pirouette® v4.5 for chemometric analysis.
In brief, the study concludes that the use of a UFGC and the diesel method ASTM D7798, along with several chemometric methods, was successful for the analysis of biodiesel-diesel blends. For the most common sources of biodiesel, the UFGC method required run times of only 2.5–3 min, resulting in a cycle times under 5 min.
Because other sources of diesel contamination, not included in this study, can mix in higher molecular weight components, the study focused on a 5-min run time and roughly 7-min cycles to ensure these higher weight contaminants did not confound the analyses.
In effect, the author concludes, a method (D7798) that is currently used in several sectors for fast analysis of diesel can now be utilised for chromatographic analysis of biodiesel-diesel blends. For More Info, email:
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Mini fl ow reactor for catalytic and thermal conversions showcased at Gulf Coast 2018
Visitors to the HEL booth at the upcoming Gulf Coast Conference (GCC) will discover options for automated, turnkey reactor solutions. All systems are fully customisable for use in batch, semi-batch and fl ow modes with parallel reactor systems for increased throughput. Systems are available in complete Hastelloy construction along with other materials.
HEL will be showcasing the FlowCAT for high pressure catalytic fl ow chemistry. The FlowCAT is a compact, bench top unit, allowing screening, optimisation and scale-up of both homogenous
and heterogeneous chemistry and incorporates a combination of gas and liquid feeds. It is the latest development from HEL, an international company that specializes in research and pre-pilot scale chemical reactors and systems.
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Visit
Petro Industry News at the
Gulf Coast
Conference 2018 Booth 207
World class viscosity measurement training
AMETEK Brookfi eld now offers its Practical Course on Viscosity Measurements. This popular course was created to help AMETEK Brookfi eld Viscometer users comprehend the functionality of their instrument, solve the mysteries of fl uid behavior and Rheology, and create successful and repeatable viscosity test methods for use in both R&D and QA/QC environments. Consistent measurement is vital in the success of any product and understanding viscosity is a key part to maintaining quality control.
The course is offered at AMETEK Brookfi eld in Middleboro, MA and at major cities across the United States. Space is limited and customers are encouraged to sign up early.
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The one-day Practical Course on Viscosity Measurements will help end users get the most out of their AMETEK Brookfi eld Viscometer and Rheometer measurements by providing them with information, activities and techniques that they can easily understand and immediately put to practical use. Discussion topics include how to pick a spindle/speed combination, methodology, rheology, calibration and verifi cation checks.
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AUGUST / SEPTEMBER •
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