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Northwestern/Princeton study explores air quality impacts of aggressive conversion to EVs

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Researchers from Northwestern University and Princeton University have explored the impact on US air quality from an aggressive conversion of internal combustion vehicles to battery-powered electric vehicles (EVs). Across scenarios, we found the more cars that transitioned to electric power, the better for summertime ozone levels.

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KIT study finds extraordinarily cold Arctic stratospheric winter enhanced ozone degradation above the Arctic

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Extraordinarily cold temperatures in the stratosphere during the winter of 2010/2011 caused the most massive destruction of the ozone layer above the Arctic so far, according to a study by climate researchers at KIT (Karlsruhe Institute of Technology). These chemical conversion products attack the ozone layer and destroy it partly.

Ozone 210
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National Research Council report finds it unlikely the US will meet cellulosic biofuel mandates absent major innovation or a change in policies

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One opportunity to reduce the cost of biofuels is to reduce the cost of bioenergy feedstock, which constitutes a large portion of operating costs, and increase the conversion efficiency from biomass to fuels. Currently, no commercially viable biorefineries exist for converting cellulosic biomass to fuel.

Renewable 252
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UNEP Report Calls for More Sophisticated Approach to Developing Biofuels; Limitations of Current LCA Studies

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Here, RME show advantages for primary energy and GHG, but disadvantages in terms of acidification, eutrophication and ozone depletion. While this mainly depends on the feedstock and conversion technology, other factors including methodological assumptions also have an impact. Source: “Assessing Biofuels”. Click to enlarge.

Ozone 186
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SCOPE Biofuels Project Releases Assessment on Environmental Effects of Biofuel Technologies

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Increasing evidence suggests that biomass can be used much more efficiently (and therefore with less environmental impact) through direct combustion to generate electricity and heat, rather than being converted to liquid fuels such as ethanol. However very few studies include water use impacts. Menichetti and Otto. Ravindranath et al.

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Researchers Engineer Yeast to Produce Methyl Halides from Biomass; Precursors for Biohydrocarbon Fuels

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cerevisiae to convert biomass to methyl halides with good yield. They can also be used as intermediates for the chemical synthesis of more complex carbon compounds such as fuel hydrocarbons. ZSM-5 and SAPO-34) have been used to convert methyl halides to products including gasoline, olefins, aromatics, alcohols and ethers.

Engine 150
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ICCT report finds global implementation of advanced emissions and fuel-quality regs could cut early deaths from vehicle emissions by 75% in 2030

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Climate benefits in the near-term (estimated using a GWP-20) are more than three times as large given the rapid benefits that the control of black carbon provides. Next-generation standards would target new reductions in emissions of NO x and non-methane hydrocarbons (HC), which are precursors to ozone and secondary particulate matter.

Emissions 220