DIESEL MANIFESTOS ARE “SHORT SIGHTED”, SAYS SCIENTIST
Sources: www.recyclingwasteworld.co.uk | Published: 01 June 2017
The head of a team of renewable fuel
scientists says he is concerned that “current
party manifestos clearly demonstrate
politicians’ lack of understanding of true
fuel emissions and engine effciency”.
Devin Walker, chief technical offcer of
London-based Renovare Fuels, says that
the information being provided to UK
policymakers is often limited in scope.
Walker is a developer in new technology
used to convert biogas from organic waste
into petrol, diesel and even jet fuel, tested
and approved to ASTM standards.
“Natural gas and petrol do produce less nitrogen oxide (NOx) but relying on these forms of fuel would be at the
expense of vehicle engine power and fuel effciencies,” argues Walker.
“In comparison to petrol engines, diesel vehicles can operate up to 30% more effciently. Petrol engines produce
less NOx, but because around 30% more fuel is needed to generate the same amount of energy, this ultimately
leads to a higher accumulation of carbon in the atmosphere
“For accuracy, we should not be simply measuring emissions from vehicles but also emissions from processing
and distribution of fuel
“New NG fuelling stations would cost around £1.4m each to construct, while new diesel stations would cost
around £116,000 each. Upgrading a bus feet to NG would cost between £23,000 and £77,000 more per bus,
compared to diesel feets.
“Recent research has shown that in trials, well-to-wheel annual GHG emissions increased up to 13.3 tons of
CO2 equivalents per NG bus, compared to a diesel bus
“We should not focus on scrapping diesel vehicles but continue to develop exhaust treatment systems which
break down nitrogen and oxygen into their individual components; allowing the retroft of current diesel engines
at a fraction of the proposed scrappage cost
“Continued development of clean diesel technologies which convert biomass and waste to diesel fuel would
also offer zero net carbon emission, in line with the government’s plan for all vehicles to be zero emission by
“The two strategies together would offer billions of pounds in fuel infrastructure savings, continued effciency
gains and reductions of not just NOx emissions but total GHG life-cycle emissions from well-to-wheel.”
Renovare Fuels has developed and trialled the world’s frst technological process which enables biogas produced
from organic waste in UK anaerobic digestion facilities, UK landflls and industry to be processed directly into
liquid fuel in the form of petrol and diesel through a carbon neutral process. According to Renovare Fuels, the
technology, which is scheduled to become commercially available later this year, produces fuel in a ready-touse form without the need for any engine modifcations.