HYBRID EVENT: You can participate in person at Boston, Massachusetts, USA or Virtually from your home or work.

2nd Edition of Global Conference on Biofuels and Bioenergy

October 26-28, 2023 | Boston, Massachusetts, USA

October 26 -28, 2023 | Boston, Massachusetts, USA
Biofuels 2023

Nick Molden

Speaker at Biofuels and Bioenergy 2023 - Nick Molden
Emissions Analytics, United Kingdom
Title : Understanding the links between biofuel composition and regulated and unregulated tailpipe emissions, and potential effects on air quality


The drive to move away from fossil fuels for transportation is leading to increasing use of ‘bio’ components in market fuel, such as the ethanol in E10 gasoline. If sourced responsibly, these can lead to reduction in lifecycle carbon dioxide emissions. However, the difference is composition may also lead to a variation in the concentration of pollutants emissions in the tailpipe post-combustion. While some pollutants may reduce, others could increase, or new pollutants may be generated. This is a particular issue with regard to volatile organic compounds (VOCs) – typically, hundreds are present in the exhaust and can potentially have health effects even at low concentrations. Further, they may go on to react in the air to create smog and secondary organic aerosols, both of which can worsen air quality.
The presentation will contain original data from Emissions Analytics’ test programme, putting together analysis of the organic components in the original fuel with the organics in the resulting exhaust flow. The test programme uses two-dimensional gas chromatography coupled with time-of-flight mass spectrometry in order to fully separate, identify and quantify organic compounds from C2 to C44. Results will particularly focus on the presence of aldehyde emissions resulting from the oxygenated compounds in the fuel. The potential secondary organic aerosol and smog formation will also be quantified.
Finally, the effects on regulated and unregulated emissions will be compared. While some alternative fuels may be beneficial in terms of regulated pollutants, the opposite could be true for unregulated. This would raise a dilemma for regulators that needs to be understood. This is particularly relevant in context of the forthcoming Euro 7/VII regulations, which include no speciated VOCs in the proposed light-duty, and limited VOCs for heavy-duty.


Nick founded Emissions Analytics in 2011 to understand real-world emissions and fuel economy and emissions from vehicles.  Its EQUA Index database of thousands of independently conducted tests is an international performance benchmark.  The wider mission is to understand the holistic environmental impact of vehicles on air, soil and water, from tyre wear rates to volatile organic compound emissions.

Nick is chairman of the European standardisation CEN Workshop 90 on collecting real driving emissions data, which has led to the publication of the AIR Index.  He is also chairman of CEN Workshop 103 on standardising the collection of vehicle interior air quality data.

He is a specialist in data analytics, particularly in the automotive market, through his prior work at Oxford Indices Ltd, a data specialist, United Business plc and Haymarket Media Group.  Nick is a graduate of the University of Oxford, and an Honorary Research Fellow at Imperial College London.