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RegGuheert
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Re: Biofuels thread

Sat Aug 27, 2016 11:54 am

New research from the University of Michigan: Biofuels increase, rather than decrease, heat-trapping carbon dioxide emissions: study
Phys.org wrote:The study, based on U.S. Department of Agriculture crop-production data, shows that during the period when U.S. biofuel production rapidly ramped up, the increased carbon dioxide uptake by the crops was only enough to offset 37 percent of the CO2 emissions due to biofuel combustion.
RegGuheert
2011 Leaf SL Demo vehicle
2011 miles at purchase. 10,000 miles on Apr 14, 2013. 20,000 miles (55.7Ah) on Aug 7, 2014, 30,000 miles (52.0Ah) on Dec 30, 2015.
Charged by our 12.75 kW solar array

Enphase Inverter Measured MTBF: M190, M215, M250

GRA
Posts: 6269
Joined: Mon Sep 19, 2011 1:49 pm
Location: East side of San Francisco Bay

Re: Biofuels thread

Sat Aug 27, 2016 12:56 pm

RegGuheert wrote:New research from the University of Michigan: Biofuels increase, rather than decrease, heat-trapping carbon dioxide emissions: study
Phys.org wrote:The study, based on U.S. Department of Agriculture crop-production data, shows that during the period when U.S. biofuel production rapidly ramped up, the increased carbon dioxide uptake by the crops was only enough to offset 37 percent of the CO2 emissions due to biofuel combustion.

Reg, that's the same study I posted above.
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].

The 'best' is the enemy of 'good enough'.

GRA
Posts: 6269
Joined: Mon Sep 19, 2011 1:49 pm
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Re: Biofuels thread

Sat Sep 10, 2016 3:16 pm

All via GCC:
KLM to operate biofuel flights out of Los Angeles
http://www.greencarcongress.com/2016/09 ... 9-klm.html

Gevo to supply Lufthansa with alcohol-to-jet fuel (ATJ)
http://www.greencarcongress.com/2016/09 ... -gevo.html

GoodFuels Marine and Boskalis successfully test UPM’s sustainable wood-based biofuel for marine fleet
http://www.greencarcongress.com/2016/09 ... 9-upm.html

ARPA-E to issue funding opportunity for advanced technologies for seaweed cultivation for fuels and chemicals
http://www.greencarcongress.com/2016/09 ... arpae.html
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].

The 'best' is the enemy of 'good enough'.

GRA
Posts: 6269
Joined: Mon Sep 19, 2011 1:49 pm
Location: East side of San Francisco Bay

Re: Biofuels thread

Mon Sep 19, 2016 3:06 pm

Via GCC:
JetBlue enters 10-year renewable HEFA SPK jet fuel purchase agreement with SG Preston; 33M gallons of 30% blend per year
http://www.greencarcongress.com/2016/09 ... tblue.html

. . . The airline will purchase renewable jet fuel made from rapidly renewable, bio-based feedstocks that do not compete with food production. This marks one of the largest renewable jet fuel purchase agreements yet, and the largest, long-term, binding commitment by any airline globally for HEFA (hydro-processed esters and fatty acids) SPK (synthetic paraffinic kerosene) -based renewable jet fuel. . . .

The renewable jet fuel portion produced from select plant oils is targeted to achieve a 50% or higher reduction in greenhouse gases emissions per gallon based on a life-cycle analysis. The fuel is expected to meet the Environmental Protection Agency’s (EPA) qualification for renewable fuel standards, as well as the Roundtable on Sustainable Biomaterials certification standard for sustainable production of biofuels.

JetBlue is currently progressing forward and working through the process with the intent of supplying New York-metropolitan area airports with renewable jet fuel. In its blended form, the total amount of renewable jet fuel JetBlue will purchase equals approximately 20% of its annual fuel consumption at New York John F. Kennedy International Airport (JFK). . . .
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].

The 'best' is the enemy of 'good enough'.

GRA
Posts: 6269
Joined: Mon Sep 19, 2011 1:49 pm
Location: East side of San Francisco Bay

Re: Biofuels thread

Sun Oct 09, 2016 4:50 pm

Via GCC:
Neste to begin selling 100% renewable diesel in Finland
http://www.greencarcongress.com/2016/10 ... neste.html

Neste plans to start selling diesel produced entirely from renewable raw materials at selected stations in Finland around the turn of the year. . . .

Neste’s proprietary NEXBTL technology makes it possible to produce top-quality renewable diesel and other renewable products out of waste and residue materials and vegetable oils. . . .

100% Neste Renewable Diesel is used in California, where it helps cities and counties to reduce traffic-related greenhouse gas emissions. Users of Neste Renewable Diesel include cities of San Francisco, Oakland, Walnut Creek, Carlsbad, and county of Sacramento. As for corporate customers, Google and UPS have also chosen to reduce their carbon footprint by using Neste Renewable Diesel. . . .
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].

The 'best' is the enemy of 'good enough'.

GRA
Posts: 6269
Joined: Mon Sep 19, 2011 1:49 pm
Location: East side of San Francisco Bay

Re: Biofuels thread

Sun Oct 23, 2016 3:49 pm

Via GCC:
Argonne LCA finds renewable diesel from algae fractionation has 63-68% lower GHG than petroleum diesel
http://www.greencarcongress.com/2016/10 ... gonne.html

. . . Early research on the fractionation process conducted at the National Renewable Energy Laboratory (NREL) demonstrated encouraging results with high yields (~65%) for hydrolysis of algal carbohydrates to monomeric sugars, and high yields (~80%) of fermentable sugars to ethanol as well as recovery of lipids via a wet extraction process at roughly 80 wt% moisture content.

Other work has shown that the fractionation pathway is attractive economically; fractionation could achieve a selling price of $4.35 per gallon of gasoline equivalent (GGE) in 2011 dollars for a high-lipid feedstock.

    The fractionation pathway is attractive economically, but it redirects biomass away from on-site renewable heat and power generation, so it is possible that GHG and energy use performance may be impaired. Performance is often assessed via a metric of emissions or energy use per unit of produced fuel. The question addressed by this paper is whether the fuel yield increase in the fractionation process compensates for the decrease in on-site heat and power production and compensates for the increase in process energy demand, e.g., for ethanol distillation.

    This study presents an LCA of energy use and greenhouse gas emissions for algal biofuels produced via the fractionation process… The LCA considered all operations in the fuel pathway, including upstream material and energy provisioning operations, cultivation, and final fuel use.

    —Pegallapati and Frank (2016). . . .
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].

The 'best' is the enemy of 'good enough'.

User avatar
RegGuheert
Posts: 5174
Joined: Mon Mar 19, 2012 4:12 am
Delivery Date: 16 Mar 2012
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Location: Northern VA

Re: Biofuels thread

Sun Oct 23, 2016 5:10 pm

It seems some biofuels are worse than others. The EU continues their assault on biofuels...

Biofuels cause four times more carbon emissions:
The Telegraph wrote:Soybeans grown in America therefore have an indirect carbon footprint of 340kg of CO2 per gigajoule, compared to just 85kg for conventional diesel or gasoline.
...and at the same time power plants in Denmark convert to burning wood pellets:
Sun & Wind Energy wrote:The energy company Dong Energy has now announced that Denmark's largest power plant in Avedøre will be completely transitioned to wood pellets by 2016, making it the largest biomass power plant in the country.
There still is a debate raging in Europe over this issue:
The Telegraph wrote: The European Commission insisted that biofuels is a complex issue and further studies need to be done.

But Kenneth Richter, Friends of the Earth campaigner, said the report proves that biofuels are not the answer to tackling climate change.

"Most of the crops used for biofuels at the moment produce more emissions than fossil fuels therefore biofuel targets in Europe make no sense and are doing opposite of what they are supposed to be doing," he said.
RegGuheert
2011 Leaf SL Demo vehicle
2011 miles at purchase. 10,000 miles on Apr 14, 2013. 20,000 miles (55.7Ah) on Aug 7, 2014, 30,000 miles (52.0Ah) on Dec 30, 2015.
Charged by our 12.75 kW solar array

Enphase Inverter Measured MTBF: M190, M215, M250

GRA
Posts: 6269
Joined: Mon Sep 19, 2011 1:49 pm
Location: East side of San Francisco Bay

Re: Biofuels thread

Wed Jan 11, 2017 7:40 pm

Via GCC:
BETO report identifies biofuel/bioproducts opportunities from wet and gaseous waste: ~22.2B GGE/year
http://www.greencarcongress.com/2017/01 ... -beto.html

The US Department of Energy’s (DOE’s) Bioenergy Technologies Office has published a report, titled Biofuels and Bioproducts from Wet and Gaseous Waste Streams: Challenges and Opportunities. The report is the first comprehensive assessment of the resource potential and technology opportunities provided by wet and gaseous feedstocks, including wastewater treatment-derived sludge and biosolids, animal manure, food waste, inedible fats and greases, biogas, and carbon dioxide streams.

These feedstocks can be converted into renewable natural gas, diesel, and aviation fuels, or into valuable bioproducts.

Direct link to DoE report here: https://energy.gov/sites/prod/files/2017/01/f34/biofuels_and_bioproducts_from_wet_and_gaseous_waste_streams_full_report_2.pdf
Guy [I have lots of experience designing/selling off-grid AE systems, some using EVs but don't own one. Local trips are by foot, bike and/or rapid transit].

The 'best' is the enemy of 'good enough'.

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