Top 13 Blendstocks Derived from Biomass for Mixing-Controlled Compression-Ignition (Diesel) Engines: Bioblendstocks with Potential for Decreased Emissions and Improved Operability
“…20,21 Evidence that cellulosic biofuels are needed to realize a low-carbon future has strengthened over the same period, 22 but the world increasingly looks to biofuels for carbon-neutral aviation and other heavy duty transport modes and to batteries and hydrogen to decarbonize light duty vehicles. [23][24][25] Given these trends, a strategic reset and increased consideration of alternatives to conventional processing paradigms appear to be warranted.…”
Hybrid processes, featuring biological conversion of lignocellulose to small molecules followed by chemo-catalytic conversion to larger molecules suitable for difficult-to-electrify transport modes, are a promising route to biomass-derived fuels in demand for climate stabilization.
“…20,21 Evidence that cellulosic biofuels are needed to realize a low-carbon future has strengthened over the same period, 22 but the world increasingly looks to biofuels for carbon-neutral aviation and other heavy duty transport modes and to batteries and hydrogen to decarbonize light duty vehicles. [23][24][25] Given these trends, a strategic reset and increased consideration of alternatives to conventional processing paradigms appear to be warranted.…”
Hybrid processes, featuring biological conversion of lignocellulose to small molecules followed by chemo-catalytic conversion to larger molecules suitable for difficult-to-electrify transport modes, are a promising route to biomass-derived fuels in demand for climate stabilization.
“…[5][6][7] Among various biofuels, low-net carbon emitting ethers in the diesel boiling range can be produced from biomass by various pathways. [8][9][10] They have favorable properties for use in engines, potentially enhancing performance and lowering tailpipe emissions. 11 For example, the International Council on Clean Transportation recognized bioderived dimethyl ether as a promising fuel candidate for reducing emissions from ships by 23-58%.…”
Section: Introductionmentioning
confidence: 99%
“…Saturated linear and branched ethers can be produced in large quantities by catalytic Guerbet coupling and dehydration of bioderived alcohols. [8][9][10] About 62% yield of C 8 -C 16 diesel-range ethers was achieved and maintained for 400 hours of time-on-stream operation when 10-50 ml min À1 of ethanol was fed to catalytic reactors. 9 Specically for 4-butoxyheptane, more than 700 g was produced from the 16 hour time-on-stream catalytic upgrading of butyrate obtained by Clostridium butyricum fermentation of corn stover.…”
Bioderived ethers have recently drawn attention as a response to increasing demands on clean alternative fuels. A theory-experiment combined approach was introduced for the five ether molecules representing linear, branched,...
“…Another recent trend in diesel engine development is interest in alternative diesel fuels (ADF) (Riiff et al, 2017;Wei et al, 2018;Sun, 2020;Gaspar, 2021). ADFs include blendstocks that aim to reduce the fuel's environmental impact by using renewable sources for components.…”
Section: Introductionmentioning
confidence: 99%
“…However, an important requirement for these ADFs is maintaining engine performance compared to standard diesel. There have been many investigations on the effect of ADF blends on their spray and combustion characteristics (Park et al, 2009;Liu et al, 2011;Liu et al, 2015;Gaspar, 2021).…”
High injection pressure in diesel engines can lead to cavitation-induced erosion in injector nozzles. One important factor affecting the severity of erosion is the fuel and its properties. Traditionally, modeling and simulation studies have used single-component representations of fuels, but realistic fuels feature a multitude of components and can even include volatile additives such as water and alcohol. To provide realistic benchmarks and comparisons, experimental measurements quantifying erosion characteristics were made using ultra-low sulfur diesel (ULSD) and two alternative diesel fuels (ADF). X-ray imaging and computed tomography were used to investigate cavitation-induced erosion onset and progression. Hard X-ray tomography revealed injector internal geometry, including details such as surface marks from the manufacturing process and erosion patterns from repeated injections. Erosion progression was measured using X-ray tomography and imaging performed between injections. The critical erosion site was found to be similar across different fuel blends, while the erosion rate and incubation time were sensitive to the fuel blend. The injector geometry and the erosion characteristics were also prepared for numerical model development and validation.
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