HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
<<  <  Page 4/5  >  >>
davidogden
User Rank
Iron
Methanol as a motor fuel
davidogden   1/19/2013 1:48:24 AM
NO RATINGS
Kudos to DuPont for their new ethanol facility in Iowa.  However, Methanol (wood alcohol) is clearly easier to produce from cellulose than Ethanol. Methanol has been used as a fuel in auto racing since before most of us were wearing diapers.

Robert Zubrin has proposed that new automobiles be fitted with corrosion resistant flex-fuel systems which could utilize Methanol. In fact, Mr. Zubrin has converted his own car to run on Methanol. The production of Methanol could become a decentralized, cottage industry throughout the country as various entrepreneurs utilized local supplies of waste wood products, manure, etc to produce affordable, renewable motor fuels. 

Perhaps this is the greatest flaw in Mr. Zubrin's plan - it would create competition for the mega-corporations that currently maintain a stranglehold on motor fuel production, refining and distribution?

David Ogden, Olam Machinery

Ann R. Thryft
User Rank
Blogger
Re: depends on the cost and the benefit
Ann R. Thryft   1/18/2013 3:28:29 PM
NO RATINGS
j-allen, thanks for the technical inputs on growing corn to make ethanol.

Ann R. Thryft
User Rank
Blogger
Re: depends on the cost and the benefit
Ann R. Thryft   1/18/2013 3:25:44 PM
NO RATINGS
Elizabeth, to some extent it's a big real-life experiment, but one that DuPont has clearly thought out well ahead of time, and which it can afford.

NiteOwl_OvO
User Rank
Gold
Re: depends on the cost and the benefit
NiteOwl_OvO   1/18/2013 1:28:47 PM
NO RATINGS
Ann,

The economy is global, yes, but I believe your post was concerning ethanol production in the US using crop waste. I doubt the US will ever be able to compete as an exporter of ethanol, so any ethanol we produce will likely be used domestically. Whether other countries agree or disagree with food-crop based bio fuels produced and consumed in the US is largely irrelevant. In regards to the post you referenced, the EC wants a "magic" fuel that costs little to produce, doesn't impact food production and doesn't emit significant greenhouse gases. The only thing that comes close is hydrogen. All bio fuels will emit greenhouse gases when used. Alcohols contain less stored energy than gasoline or diesel, so when compared on a gallon to gallon basis, we will consume significantly more ethanol than the fossil fuels it replaces and it is likely that switching from gasoline to ethanol will result in a higher production of greenhouse gases. Bio fuels are not the answer to the question of how to reduce greenhouse gases. They are just renewable alternatives to fossil fuels. The EC's efforts to encourage the development of bio fuels that significantly reduce greenhouse gases is a waste of time. Development of hydrogen as a fuel source is the best we can do for now.

Not as "well off" as the US?!! Considering our monumental and ever growing national debt? Nobody is worse off than we are. We're just kidding ourselves if we think otherwise.

j-allen
User Rank
Gold
Re: depends on the cost and the benefit
j-allen   1/18/2013 11:42:04 AM
NO RATINGS
There is a fundamental problem with using corn (grain) to make alcohol fuel.  The total fossil fuel energy required to produce the corn and make it into ehtnaol is greater that the calorific value of the alcohol.  Thus it is both an environmental and a thermodynamic loser.  See "Thermodynamics of the Corn Ethanol Cycle" from U. of Calif.  Cellulose as a feedstock at least theoretically overcomes this problem. 

 

Also, since photosynthesis converts <1% of solar energy into plant-based enthalpy, it compares very poorly with photovoltaic efficiencies which run about 15%.  Thus if you have a field and want to use it as an energy source, PV is a much better choice.  Of course the product will be electricity, rather than a liquid fuel. 

 

Please note that I have no objection to corn alcohol as a fuel, so long as I burn it in the Krebs cycle rather than the Otto cycle.  (just kidding)

Ann R. Thryft
User Rank
Blogger
Re: depends on the cost and the benefit
Ann R. Thryft   1/18/2013 11:39:54 AM
NO RATINGS
NiteOwl, many different people and countries completely disagree with growing food crops for making ethanol, or with growing non-food crops to make biofuel on land that could be used for growing food, whether that's here in the US or elsewhere. The economy is now global, and much of the rest of the world is simply not as well off as the US, so what may make economic "sense" here for a small minority does not make that sense for the rest, or even when considering that small minority in context. The literature is vast and the regulations are many. We have covered the subject briefly here: http://www.designnews.com/author.asp?section_id=1392&doc_id=253371

NiteOwl_OvO
User Rank
Gold
Re: depends on the cost and the benefit
NiteOwl_OvO   1/18/2013 10:54:44 AM
NO RATINGS
Ann,

I grew up on a farm in IL. My father raised quite a bit of corn. We never disposed of corn stalks. Cattle will eat some of them and the rest can easily be mulched and used to fortify the soil as well as protect it from erosion. I don't understand where the issue of disposing of corn residue is coming from. If there is enough profit from harvesting corn stalks as a product to cover the production costs and additional cost for fertilizer to replace the removed stalks, then DePont's biofuel project may be viable. I seriously doubt it, though. The cost for fuel and fertilizer are significant.

The push to produce ethanol from non-food crops may very well be a waste of time. If the US is serious about producing ethanol as a renewable fuel, then we will use farm land to grow fuel crops. Using corn as a fuel crop makes sense. Not only can it be used to make fuel, it can be used for food. Wherever the demand is highest. Plus, the fermented corn mash waste can be used as a food component for pigs. We should not be concerned about corn being used for producing fuel. We should be concerned about using food producing land to grow fuel-only crops. Using food-crop residue makes sense, but only if it's cost effective. The push to stop using food-crops to make ethanol is a reaction to higher corn prices, which are the result of higher demand for corn. Plain and simple. As corn prices increase, so will corn production to the point where the price drops. We have thousands of acres of farm land enrolled in the Federal Feed-Grain program, which pays farmers to NOT produce grain on that land. If food production ever becomes an issue, that farm land can be put back into production. The reason farmers opt-in for the Feed-Grain program is because it makes economic sense. The Feed-Grain program was created to reduce grain production and support higher grain prices. If grain prices are getting too high, then that program is no longer needed.

Cheers.

Elizabeth M
User Rank
Blogger
Re: depends on the cost and the benefit
Elizabeth M   1/17/2013 2:48:56 PM
NO RATINGS
As usual, well put, Ann. Motivation is probably one of the biggest factors, here. If someone wants to do something enough, they will find a way to do it cost-effectively, excuses be damned. I do hope this effort has legs.

Ann R. Thryft
User Rank
Blogger
Re: depends on the cost and the benefit
Ann R. Thryft   1/17/2013 2:46:47 PM
NO RATINGS
I think Elizabeth's point is well taken. The examples Lou gives are of failures, not successes. And there have been successes. In addition, I learned growing up next to Silicon Valley that, if you've got enough time, money and innovation you can solve almost any technical problem and make it financially worthwhile to do so. But you have to be motivated, and innovative enough to figure out the best way to make it work. From what I can see, DuPont has all of those going for it.

Ann R. Thryft
User Rank
Blogger
Re: depends on the cost and the benefit
Ann R. Thryft   1/17/2013 2:45:33 PM
NO RATINGS
Lou, the feedback--granted, given by DuPont and participating farmers--is that it costs them to have the stover hauled away. Presumably, they'd have to bundle it for that, too, so having DuPont pay them for it was worth the cost. There's also the cost of diseases and pests the un-removed stover harbors to be factored in. Perhaps whether it's financially worth it depends on the size of the farm, and of the crop. The farmers are being recruited from those in a radius of 30 miles, though, and 500 in that area sounds like a lot to me.

<<  <  Page 4/5  >  >>


Partner Zone
Latest Analysis
IBM announced it is dedicating $3 billion of funding over the next five years to research and development of new processor technologies.
A soundproofing invention called Acoustiblok recently won a television challenge to silence an air horn with only a fraction of an inch of polymer material.
Rethink Robotics has upgraded Baxter the Robot so it can be easily trained by co-workers who simply show the robot how to move.
Robots came into their own in the 1970s. Gone were the low-budget black-and-white B movies. Now robots roamed in full-color feature films with A-list actors.
The rear window on Ford's Lightweight Concept vehicle, based on the Fusion model, is made with a material combination devised by SABIC that saves 35% of the weight. The car's overall weight is 25% lighter than a standard production 2013 Fusion.
More:Blogs|News
Design News Webinar Series
7/23/2014 11:00 a.m. California / 2:00 p.m. New York
7/17/2014 11:00 a.m. California / 2:00 p.m. New York
6/25/2014 11:00 a.m. California / 2:00 p.m. New York
5/13/2014 10:00 a.m. California / 1:00 p.m. New York / 6:00 p.m. London
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Jul 21 - 25, Design Products With Bluetooth Low Energy
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Next Class: August 12 - 14
Sponsored by igus
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service