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Increasing Yield from Gasification

03/22/2010 7:53 AM

A new process can make more fuel from biomass.

By

Kevin Bullis

Friday, March 19, 2010

Biomass can be converted to fuels via a process called gasification, which uses high temperatures to break feedstock down into carbon monoxide and hydrogen, which can then be made into various fuels, including hydrocarbons. But there's a major drawback--about half of the carbon in the biomass gets converted to carbon dioxide rather than into carbon monoxide, a precursor for fuels. Now researchers in University of Minnesota and the University of Massachusetts, Amherst, have developed a method for gasifying biomass that converts all of the carbon into carbon monoxide.

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#1

Re: Increasing Yield from Gasification

03/23/2010 3:45 PM

This looks like a "rob Peter to pay Paul" process where nothing is actually gained. The use of hydrogen to reduce carbon-dioxide makes water and carbon-monoxide but what is gained in doing that? A much better process can be developed making liquid hydrocarbons from the raw materials like old tires and other waste without making CO and H2O.

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#3
In reply to #1

Re: Increasing Yield from Gasification

05/18/2011 11:22 PM

Introduce O2 in this mix and the temp at the heat exchanger increases 4-5 times reducing ash and creosote too. What's not to like

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#4
In reply to #3

Re: Increasing Yield from Gasification

05/19/2011 4:51 PM

What's not to like is nothing is gained. You spend more and more and get less and less by doing stupid things that look good but are anything but.

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#5
In reply to #4

Re: Increasing Yield from Gasification

05/21/2011 11:22 PM

Eh? Better to let it go up the stack and stick with 600 degrees

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#6
In reply to #5

Re: Increasing Yield from Gasification

05/23/2011 1:44 PM

What needs to be done is a redesign-a new process not requiring oxygen at all. We don't need to pollute the atmosphere to have abundant liquid fuel supplies. We need better engineering than the nineteenth century stuff you guys are using now.

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#7
In reply to #6

Re: Increasing Yield from Gasification

05/23/2011 5:42 PM

Fischer Tropsch isn't exactly 19th century

it takes energy to reconfigure compounds into liquid fuels

if you have something better

let's hear it...

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#8
In reply to #7

Re: Increasing Yield from Gasification

05/23/2011 6:21 PM

FT is exactly the right process for the nineteenth century like many processes we now use. It is the same kind of logic that caused the Romans to fail-stuck in a rut not knowing how to use the stuff they and we have in abundance. Making liquid fuel does not have to be done with oxygen-in fact oxygen hinders the transformation. We have several systems in operation that make liquid and gas and they all work poorly even though our engineers have worked their hearts out to do the best they can. Fix the problem by looking at the basic reactions that lead to liquid fuel. they need hydrogen and carbon-not oxygen. Oxygen has to be removed for a effective process to proceed-O2 is poison. Now, after doing the math we can proceed with design work.

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#2

Re: Increasing Yield from Gasification

05/22/2010 11:45 PM

Yes, I am working on both Biomass Gasification & Coal Gasification because we are running out of gas and in winter 4 months gas shutdown so Industries have to operate on Furnace Oil. One gasifier can provide enough gas for 4.5 MW gas engines or to operate a 15 Tph steam Boiler.

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