Plastic Material
Refinery plant
Optimized solution for quality control of pyrolyis oil
High precision CHNS/O measurements with unbeatable low detection limits for oxygen analyses
Reliable quality monitoring of pyrolysis oil
How CHNS/O elemental analysis can help to monitor the quality of recycled oils
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Monitoring the quality of recycled oil with easy and accurate CHNS/O elemental analysis

The emergence of chemical recycling methods that turn plastic waste back into oil represents an important breakthrough to battle the plastic waste problem. However recycled oil (often termed pyrolysis oil) has slightly different properties than fossil crude oil. High concentrations of heteroatoms (i.e., sulfur, nitrogen, and oxygen) in recycled feedstock are undesirable, since they can poison the catalysts or cause corrosion in refinery equipment. To make sure that the recycled oil is compatible to be further processed into new chemicals, virgin-grade plastic products or fuel its carbon, hydrogen, nitrogen, oxygen, and sulfur (CHNOS) contents need to be measured.

Learn how to monitor the quality of recycled oil, even with high concentrations of heteroatoms.


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Precise and accurate results even at lowest oxygen contents down to 10 ppm

Whereas the oxygen content of crude oil is inherently low, recycled oil often has significant levels of oxygen. Therefore, knowing the exact oxygen content is necessary for further refinery processing. Oxygen analysis is easily accomplished with our rapid OXY cube®, the only dedicated elemental oxygen analyzer in the market. Benefit from its highly accurate, highly precise, and matrix-independent analytical results thanks to an extraordinarily high pyrolysis temperature of 1,450°C. This high temperature ensures that the oxygen in the sample is completely converted into the target analyte carbon monoxide. There is no need for time-consuming matrix standard run-ins between the samples.

Oxygen analyzer rapid OXY cube

The unparalleled limited of detection (LOD) of 10 ppm is made possible with a powerful IR-Upgrade. Due to its high sensitivity even the lowest oxygen concentrations result in tall and narrow peaks. Since the IR detector only responds to the target analyte CO, the pyrolysis gases can directly be analyzed via the IR detector. This results in a sample analysis time of 3 - 4 minutes, an even lower system blank and helium savings.

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Reliable CHNS measurements optimized for the high C and H contents of oil samples

Oils are very high in carbon and hydrogen and low in nitrogen and sulfur. Excellent peak separation is therefore crucial to obtain accurate analytical data. To ensure highly reliable results, the vario EL cube uses a unique peak separation mechanism with 3 gas-separating columns. This intelligent peak separation adjusts dynamically to each individual sample and makes a big difference for the C-H peak separation of oil samples.

For precise measurements of hydrogen and sulfur concentrations, the vario EL cube’s tubing is actively heated. This prevents condensation water inside the system and thus the misquantification of hydrogen and sulfur. Particularly oil samples, with their high hydrogen content, tend to form water when combusted with O2.

Elemental analyzer vario EL cube

Trace sulfur analysis is enabled by an optional IR detector. The nitrogen content of oils tends to be low. Here, it is of advantage that the vario EL cube has extremely low nitrogen blanks thanks to our patented ball valve technology. It effectively prevents the measuring results from being influenced by ambient air.

Thanks to the outstanding robustness of our instrument, lager sample sizes can easily be measured which reduces weighing errors and leading to higher precision.

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Convenient and easy to work with

For the reliable introduction of oil samples both instruments can be equipped with two different kinds of autosampler. The solid autosampler can be used with oil samples packed in capsules. To minimize the preparation effort to an absolute minimum, the optional vario Liquid sampler (VLS) can be used.

Both analyzers are characterized by a low-maintenance design, which includes long-term stable calibrations. Within the software, a counter keeps track of how many samples can be run before the next maintenance task is due. Whenever maintenance is necessary, our user-friendly clamp connections ensure a tool-free maintenance experience, while the slide-out furnace gives easy access to all important parts and guarantees a comfortable working posture.

Discover more information about the instruments & the analysis of liquid fuels

Flyer rapid OXY cube
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Flyer vario EL cube
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Determination of the oxygen concentration in liquid fuels with the rapid OXY cube
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CHNS analysis in liquid fuels with the vario EL cube
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Easy and accurate CHNOS elemental analysis of recycled oil

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You would like to have more information? We will be happy to answer your questions about the easy and accurate CHNS/O analysis of recycled oil as well as the rapid OXY cube® and the vario EL cube. Let us know how we can support you.

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