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10.00 James Hobday.pdf
1.
What’s in a
Tyre? Degradation and Compound Analysis James Hobday September 26th 2022
2.
CONFIDENTIAL © Emissions
Analytics 2022 When it comes to the pursuit for improved air quality, we believe in the power of clarity, transparency and integrity. With real -world data we can meet emissions challenges – instilling trust and confidence in our industry partners and public. It’s with our commitment and independence we are able to make a significant contribution toward positive change and to achieve enduring results. Our Belief 2
3.
CONFIDENTIAL © Emissions
Analytics 2022 Introduction 3 • Founded in 2011, headquartered in the UK • Operations in UK, Germany, USA and South Korea • Independent testing house specialising in real -world emissions testing • Over 2,500 vehicles/machines tested across passenger, commercial and off -road • Largest commercially available database of real -world emissions data • Work with regulators, OEMs, Tier 1/2 suppliers, fuel and chemical companies, fleets • Led EU CEN Workshops 90 and 103 • Work with major universities around the world
4.
5.
CONFIDENTIAL © Emissions
Analytics 2022 Evolution of Emissions Analytics 5 • EQUA Tailpipe database demonstrated real-world emissions performance long before the issues were widely known • EQUA Cabin showed how poor filtration can lead to the air quality in vehicles being worse than outside • EQUA Tyres now focuses on the source of vehicle pollution that is likely to come to dominate not just air pollution, but soil and water Arelentless focus on what happens in the real world through the power of data
6.
Context 6
7.
CONFIDENTIAL © Emissions
Analytics 2022 The tyre emissions problem 7 • Over 300,000 tonnes of tyre ‘rubber’ are released in US + Europe annually • Emissions rates are increasing while tailpipe emissions are falling • Tires have complex, opaque chemistry • Environmental propagation and health effects are poorly understood • No real-world standard test method exists Independent insight and clarity urgently needed
8.
Tyre degradation 8
9.
CONFIDENTIAL © Emissions
Analytics 2022 Real-world tyre degradation measurement 9
10.
CONFIDENTIAL © Emissions
Analytics 2022 Particle size distribution 10
11.
CONFIDENTIAL © Emissions
Analytics 2022 Environmental propagation 11 • On-road test with ‘normal’ dynamics • 11% of fine particle mass is below 2.5 µm diameter • This material is likely to hang in the air for a period • The rest is likely to go to soil and water • But this mass accounts for almost 100% of particle number • And ultrafines account for 92% • Affect of desorped VOCs on air quality unknown Tyres are simultaneously a problem for air, soil and water Particulate mass mg/km PM10 36.5 PM2.5 4.1 PM2.5 proportion of PM10 11% Ultrafine proportion of PM10 0% Particulate number # x1011 /km Down to 23 nm 1.1 Down to 6 nm 14.5 Fine as proportion of PM10 8% Ultrafine as proportion of PM10 92%
12.
CONFIDENTIAL © Emissions
Analytics 2022 Tyres vs tailpipe 12 • Tailpipe emissions have fallen dramatically • Tyres are x1,850 times more polluting for particulate mass • Airborne tyre particulate mass is greater than the maximum tailpipe limit • Tyres are x29 times more polluting for particulate number • This is x2.4 maximum allowed at tailpipe • Tyre mass emissions increase by 21% for 500 kg extra mass, all else equal • This increase is x389 the average tailpipe mass emission
13.
Chemical Analysis 13
14.
CONFIDENTIAL © Emissions
Analytics 2022 Measurements – volatile organic compounds 14 • Two-dimensional gas chromatography with mass spectrometry from • INSIGHT flow modulator from SepSolve Analytical for separation • BENCH-TOF time-of flight mass spectrometer • OPTIC-4 sample introduction
15.
CONFIDENTIAL © Emissions
Analytics 2022 Two-dimensional pyrolysis chromatogram 15
16.
CONFIDENTIAL © Emissions
Analytics 2022 Functional group classification 16 • Wide-ranging analytes identified • Alkanes: lungs, liver, kidney, brain • Cycloalkanes: headaches, dizziness • Terpenes: aromas • Aromatics: carcinogens • N-containing: carcinogens Alkanes Cycloalkanes N-containing Aromatics Terpenes
17.
CONFIDENTIAL © Emissions
Analytics 2022 Common, prevalent compounds in tyres 17 • Fragrances– citrus, sweet, woody, spicy • Irritants – eyes, skin • Aromatics – often carcinogenic • High-order carbon compounds • Many unknowns in traditional spectral libraries Top ten compounds automatically shown for each tyre
18.
CONFIDENTIAL © Emissions
Analytics 2022 Prevalent to significantly varying degrees • N-(1,3-dimethylbutyl) -N'-phenyl-p-phenylenediamine, aka 6PPD • Preservative, reacts with ozone in the air • 6PPD-quinone killed coho salmon in California • Present in 97% of tyres tested • Mean concentration (ng/mg): 919 • Maximum concentration measured: 3,832 • Balance between its purpose and potential environmental impact • No clear alternative Notable compounds include 6PPD 18
19.
Toxicity analysis 19
20.
CONFIDENTIAL © Emissions
Analytics 2022 Toxicity evaluation 20 • Globally Harmonized System of Classification and Labelling of Chemicals (GHS) – United Nations’ standardised system • Compounds identified CAS Registry Number, unique identifier assigned by US Chemical Abstracts Service • European Chemicals Agency database of manufacturer disclosures • ‘Hazard codes’ described different effects, from irritants to carcinogens • Each compound can have multiple hazard codes • Different manufacturers can make different disclosures Method developed to synthesise into overall toxicity rating for a tyre Hazard code Description H300 Fatal if swallowed H301 Toxic if swallowed H302 Harmful if swallowed H303 May be harmful if swallowed H304 May be fatal if swallowed and enters airways H305 May be harmful if swallowed and enters airways
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Analytics 2022 Toxicity results 21 • Over 250 tyres now tested • 410 organic compounds separated on average • 78 organic compounds identified using NIST library • 46 hazard codes cited • Least toxic tyre 85% less than worst • Least toxic manufacturer 61% less than worst
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EQUA Database 22
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Analytics 2022 Subscription database 23 The EQUAplatform to provide summarised results via corporate access to a cloud based database with raw data upon request Fingerprinting database now available For benchmarking, research and development
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Analytics 2022 Summary 24 • Tire wear emissions are a material and growing concern • For air, soil and water – and, indirectly, the human food chain • Wear can be measured in real-world conditions • Two-dimensional gas chromatography offers possibility of full chemical profiling • Toxicity can be estimated from that • Composition can be correlated to performance
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Thank you. James Hobday Business
Development Director jameshobday@emissionsanalytics.com +44 (0)20 7193 0489
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Analytics 2021 Assured Emissions testing in real -world conditions brings challenges that experience anticipates and expertise overcomes. We deliver. Independent Objectivity and candour are the driving forces in all our work, so you know the facts. Responsive We’re fast on our feet so we can conduct emissions testing when and where we’re needed. ASSURED| INDEPENDENT | RESPONSIVE 26
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