Question
Asked 10th Jan, 2014
  • Boundless Impact Research and Analytics

How would you define drop-in (or non-drop-in) alternative fuel?

What's the best definition you've seen? I would like to use an existing government policy or national lab/academies report. Or, how could I improve these two draft definitions below?
To start, the US Energy Policy Act of 1992 still seems to be the authority on "alternative fuel." (Thank you EERE for making this list easy to find.)
Methanol, ethanol, and other alcohols
Blends of 85% or more of alcohol with gasoline
Natural gas and liquid fuels domestically produced from natural gas
Liquefied petroleum gas (propane)
Coal-derived liquid fuels
Hydrogen
Electricity
Fuels (other than alcohol) derived from biological materials (including pure biodiesel (B100))
P-Series
My first stabs at "drop-in" and "non-drop-in." (Thank you CAAFI for getting me started.)
Drop-in Alternative Fuel:
An alternative fuel that is completely interchangeable and compatible with a particular conventional (typically petroleum-derived) fuel. A perfect drop-in fuel does not require adaptation of the fuel distribution network or the vehicle or equipment engine fuel systems, and can be used “as is” in vehicles and engines that currently operate on that particular fuel. Some alternative fuels may become “drop-in” only after blending with conventional fuel to a certain prescribed proportion.
Non-drop-in Alternative Fuel:
An alternative fuel that is not completely interchangeable and compatible with a particular conventional (typically petroleum-derived) fuel. A non-drop-in fuel requires adaptation of (or special treatment within) one or more components of the existing fuel distribution network or the current fleet of vehicle and equipment engine fuel systems. Some alternative fuels must be carefully segregated from conventional fuels, while others may be safely blended with conventional fuels. Some alternative fuels may remain “non-drop-in” even after blending with conventional fuel.

All Answers (2)

3rd Apr, 2014
Antje Klitkou
Nordic Institute for Studies in Innovation, Research and Education
There is a gradual difference between drop-in and non-drop-in alternative fuels: ad a low blend of petroleumm with bioethanol (ca. 5%) conventional internal combustion engines need no adaptation, while at higher blends such adaptations are required.
1 Recommendation
13th Nov, 2021
Abu Yousuf
Shahjalal University of Science and Technology
Drop-in fuel: replaceable with existing fuels, no need modification of engine or distribution system.
Non-drop-in: need some modification to adapt the new fuels
1 Recommendation

Similar questions and discussions

Scientists Support Ukraine
Discussion
Be the first to reply
  • Ijad MadischIjad Madisch
Like so many, I am shocked and saddened at seeing war break out in Europe. My thoughts – and those of the ResearchGate team – are with the people of Ukraine and everyone affected.
ResearchGate is an international company, whose purpose is to enable scientists across the world to work together openly and collaboratively, regardless of borders or nationality. We have people from over 40 countries on our staff of around 200, and being based in Berlin, we are profoundly aware of the human cost of conflicts, the echoes of which have shaped and scarred our home city. We join with the international community in condemning the actions of the Russian state.
We have been asking ourselves: What can we do?
From today, we will offer free advertising space worth $2.5 million on our network to humanitarian organizations working to respond to the crisis. ResearchGate benefits from over 50 million visitors every month, and we hope this initiative can help raise funds and awareness for those organizations that are having direct impact and need support.
We also want to use our platform to highlight the response from the scientific community. Personally, I have found the messages of support from scientists everywhere to be truly heartfelt, and I would like to highlight some of the community initiatives I’ve seen here:
Additionally, I’m posting here some of the organizations responding to the crisis and actively soliciting donations:
To help gather more support for these initiatives, please consider sharing this post further (you don’t need a ResearchGate account to see it), and I will continue to update it with other initiatives as I find them. You can also click “Recommend” below to help others in your ResearchGate network see it. And if you know of any other community initiatives that we can share here please let us know via this form: https://forms.gle/e37EHouWXFLyhYE8A
-Ijad Madisch, CEO & Co-Founder of ResearchGate
-----
Update 03/07:
This list outlines country-level initiatives from various academic institutions and research organizations, with a focus on programs and sponsorship for Ukrainian researchers:

Related Publications

Book
The Department of Defense (DOD) is the single largest consumer of energy in the federal government, spending billions of dollars annually on petroleum fuels to support military operations. One of DOD’s strategic operational energy goals is to expand its energy supply options. Investing in alternative fuels-liquid fuels, derived from non-petroleum f...
Article
Full-text available
span style="line-height: 115%; font-family: 'Calibri','sans-serif'; font-size: 9pt; mso-fareast-font-family: Calibri; mso-ansi-language: EN-GB; mso-fareast-language: EN-US; mso-bidi-language: AR-SA; mso-ascii-theme-font: minor-latin; mso-fareast-theme-font: minor-latin; mso-hansi-theme-font: minor-latin; mso-bidi-font-family: 'Times New Roman'; mso...
Article
Interest in alternative fuels to petroleum and classical fuels is growing very rapidly in recent years. Furan and its alkyl derivatives, such as methylfuran (2MF), have been identified as valid alternative biofuels. This study focuses on the self reaction of the peroxy radical generated in the first oxidation step of 2MF, initiated by Cl atoms at 3...
Got a technical question?
Get high-quality answers from experts.