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That means that, pound for pound, they offer about the energy density of gasoline.
"Maybe this time it will be different, but part of the problem is that the energy density of gasoline is very nearly miraculous".
Though battery technology does not yet rival the energy density of gasoline, that hasn't stopped the Chevy Volt and Nissan Leaf from trying.
The energy density of gasoline is about 32 MJ/L, while butanol shows 29.2 MJ/L compared to ethanol, 19.6 MJ/L, and methanol, 16 MJ/L.
Nowadays, the automotive industry pays great attention to catalytic reforming of gasoline (CRG) to produce hydrogen, owing to the existing infrastructure and high power density of gasoline.
The holy grail is a battery powerful and safe enough to challenge the energy density of gasoline and the freedom of the internal combustion engine".
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Although ethanol production by fermentation has a long history and plays an important role for transition to bio-based fuels, it is not an ideal gasoline replacement due to its low energy density (∼70% of gasoline), high vapor pressure, and high hygroscopicity, making ethanol incompatible with the current infrastructure.
More cylinder pressure yields more power, and thus the energy-density advantage of gasoline can be nullified.
Ethanol, however, is limited by its low energy density (∼70% of gasoline) and hygroscopicity, making it incompatible with the current infrastructure.
The density of crude oil, gasoline or kerosene is lesser than that of water or saline-water, which causes the lesser power consumption.
Butanol, a four-carbon primary alcohol, is not only an important bulk chemical feedstock, but also a promising next-generation liquid fuel because of its superior characteristics over ethanol, such as higher energy content, less hygroscopicity, better blending ability, and an energy density closer to that of gasoline (Dürre 2007).
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Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com