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April 05, 2005

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Tony

I don't understand where the oxygen goes in making synthetic gasoline and diesel fuels. One carbon monoxide molecule and two hydrogen molecules make one methanol molecule. But alkanes don't contain oxygen. Either the wax mentioned acts as a sink for carbonyl and hydroxide groups or the fuel is dominated by oxygen containing sythetic carbohydrates such a ethers and esters. I could find nothing on the Internet that said exactly what is in synthetic diesel. If society is going to evaluate synfuels processes, including Fischer Tropsch and Bergius, we need more information.

Pete Johnson

The Wikipedia article on Fischer-Tropsch shows the reaction as

(2n+1)H2 + nCO --> CnH2n+1 + nH2O.

In other words, the oxygen and excess hydrogen go into water as a byproduct.

Loek

Hi there,

I wanted to comment on the part you quoted from Hirsch. That document is filled with uncertainties and is really not an independent study. It was done and funded by the U.S., and we Europeans all know that America does not readily want to change. This report only shows the willingness and not the real routes to Renewable Energy Sources. That's all.

Furthermore, this is a great website which I will be visiting more in the future. I am doing my master thesis on the future of FT-fuels, so that's how I find this website.

Ray

I wish to know what happens to the sulphur in the process if the coal used has high content.

John Sandford

What are the tail gas constituents from the FT especially % CO2 . I assume the catalyst is either FE2O3 or other.
J Sandford

Lala

What are then the possible disadvantages of the FT process?

Lala

Rama.J

I very much enjoyed the energy blog, it is nice. But I think the site has a shortage of detail technical notes.

Ehimen Harrison

I am doing my master thesis on clean energy source from coal.I will want to know while most countries around the world have not adopted the technology on deriving synthetic gasoline,diesel from coal,bearing in mind from available literatures that the cost of conversion will be cheaper than that derived from crude oil.
I will also want to have a comperism of cost between crude oil derived fuels and coal derived synthetic fuel.
Harrison

mohit

I am doing my master thesis on clean energy source from coal.I will want to know while most countries around the world have not adopted the technology on deriving synthetic gasoline,diesel from coal,bearing in mind from available literatures that the cost of conversion will be cheaper than that derived from crude oil.
I will also want to have a comperism of cost between crude oil derived fuels and coal derived synthetic fuel
mohit

Kit p

Some advice on you thesis. Find out what your professors want to hear and tell it to them. So much for available literature.

Ten years ago when I was working on my thesis, FT based on natural gas was future; coal and nuclear power was dead. All but the most economical US nukes would close down yearly. Natural gas was cheap and would never go above $4/MMBTU.

Now we are looking at nukes and coal again. The price of natural gas and oil have come down before. Will we find more cheap oil or gas? Will the economies China and India collapse or continue to grow?

Sumit Lekhi

Does the process contions when we change from fixed bed reactor to Slurry phase reactor?

jim

HI
A LOT OF HOPE IS PINNED ON THE Fischer-Tropsch process TO PRODUCE LIQUID FUEL FROM ALMOST ANYTHING (BIOMASS) , THERE ARE 2 CONSIDERATIONS OF IMPORTANCE HERE:
1-MACHINES WITH PERPETUAL MOTION DO NOT EXIST.. IE.HOW MUCH ENERGY DO YOU NEED TO SPEND (X) TO PRODUCE (Y) AMOUNT OF ENERGY IN THE FORM OF LIQUID FUEL..AND AT WHAT COST ?
VERY OFTEN X IS > Y
2-THE DREAM OF FINDING THE IDEAL CATALYST THAT WILL CHANGE EVERYTHING IS JUST THAT A DREAM.

Yosi Kasavi

Hi,

What is the cost of gasoline produced from coal by using the FT process compared to real gasoline.
As far as I know USA has big coal reserves. How likely is that this process will end the dependence of the US economy to middle-east oil.

chin

The FT catalyst seems to be the key to the conversion. Yet there is so little information on this. Are these proprietary and closely held secrets? Do this have to be engineered to the particular feed or will generic catalysts do? Does anyone know the costs of these catalysts if they are iron based?

Christopher Paul

Interesting article. More interesting is the offtake from FT Fuels in the U.S. The U.S. Air Force and Airliners are buyers for the Diesel to be produced via this process. Already Ohio Clean River, through BAARD has begun production of a facility to accomplish FT Fuel production using Coal and Bio-mass with Carbon Dioxide gas to be recycled to more buyers down river to inject into oil wells for further energy production. In all, this process looks pretty promising for future energy supplies.

Tunde

Hi,
I'd like to know how much energy would be released by a decane oxidation reaction in a 50,000 barrel/day Fischer tropsch GTL plant. Thank you.

Esa

Hey!

I would like to know how much energy (MW) does Fischer Tropsch slurry bubble column reactor typically produce (the heat from the exothermic reaction) ? Thank you.

Esa

Hey!

I would like to know how much energy (MW) does Fischer Tropsch slurry bubble column reactor typically produce (the heat from the exothermic reaction) ? Thank you.

Matt

To Sumit Lekhi:

This is not a perpetual motion machine. You are taking a highly energetic, but inconvenient fuel (coal), and converting it into a slightly less energetic, but much more convenient fuel (diesel). The overall process consumes energy, so you get less energy out than you would if you just burned the coal.

Sandman

Thanks for this very comprehensive piece :)

g  whellams

Has any one applied an RF cataliser in the FT process? Seems to me , a magnetically retained micro wave plasma would raise the temperature and reduce the required volume and pressure of a conventional reactor and at the same time increase the output.

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Does anyone have data on the yields of the Fishcher Tropp process? I seem to recall that it is very inefficient and endothermic ( requiring energy in) with yields down at 60% which would affect economics of this process.

danial

good blog

Todd Pollard

Dear Fellow F-T Bloggers,

I am shopping for an off-the-shelf, supported, cobalt-based catalyst in extrudite or spherical form. I've gone to about 10 companies now and have had no success. Can anyone suggest a source please?
Best Regards to All...TP

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Jean Marguerat

One aspect that has not been discussed earlier is that high-temperature gasification processes for municipal solid waste (MSW) produces synthesis gas (CO CO2 H2). This gas could be used as feedstock for an FT reactor anc converted to liquid fuel. Now that would be a useful addition to waste processing !

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Steam reforming seems to be the "road less taken" when it comes to making synthesis gas because of the energy expenses involved. But that just might change if concentrated solar power were used to make super-heated steam. Maybe adapting a scheme such as that from BrightSource (steam producing solar tower) might give a bonny boost to solar-assisted syngas. And if the carbon source comes exclusively from biomass it could also mean farewell to the fossil fuel age.

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5 Things You Need to Know About The Fischer-Tropsch Process. Why Fischer-Tropsch Synthetic Fuel?Synthetic fuels represent an interesting alternative to petroleum,1.Why Fischer-Tropsch Synthetic Fuel? 2.How the F-T Process Produces Fuel.3.Many Raw Materials can be Used.
4.Alternatives Become Attractive as Fuel Prices Climb.5.Diverse Use of Synthetic Fuels

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