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THE Thermal Depolymerization Thread (merged)

Discussions of conventional and alternative energy production technologies.

Postby Russian_Cowboy » Wed 01 Jun 2005, 02:45:01

$this->bbcode_second_pass_quote('big_rc', 'H')ere is a pretty good rebuttal of the TDP process that brought up a number of questions that I hadn't thought of. It's in the form of a rant by a chemist but it's a pretty fun read. Here is the answer to my turkey guts question. It looks like a bust. Sorry folks. Doesn't look like to much here to get excited about.


Well, I would agree with the rebuttal only in that the thermal depolymerization can convert only animal waste consisting of proteins and fats to oil. Hence, it will not convert old refrigerators or tires or plastic bottles ot junk paper into oil as the authors claim. But everything else seems to be OK. As far as the low yield is concerned, turkey offal consists of at least 70% of water. Plus maybe 4% is nitrogen. So only 25-26% of the offal can possibly be converted into oil.

Then it is quite stupid to write something like that:

$this->bbcode_second_pass_quote('', 'T')hat's an 18 percent yield. Where is the rest of it going?

http://www.mindfully.org/Air/2005/Chang ... 2apr05.htm

There is no way to get a yield above 23% for this process.
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Postby 0mar » Wed 01 Jun 2005, 03:52:02

$this->bbcode_second_pass_quote('SmokeStack', '')$this->bbcode_second_pass_quote('', 'T')his is great stuff-as one facet of a sustainable distributed system. But as a panacea for a broken centralized industrial society, or even peak-oil delay, it feels to be another Titanic deck chair mambo.

1. Turkey (chicken for that matter) entrails are food. (to paraphrase Soylent Green). They become feed for other turkeys and other barnyards animals. So this gasoline feed stock is no longer available as human feed stock.

2. Turkey offal does not pump nor flow easily. Poultry production is dispersed all over this country while we now rely on centralized oil refineries. Will people drive up to the turkey farm for a fill up?

Peter


Turkey offal is only one source of feedstock for TDP. Sewage, most garbage, just about anything carbon based is said to work. I'm not too worried about the logistics of potential feedstocks at this point. The first commercial plant is still cutting its teeth with turkey offal, and other commercial plants using different feedstocks have yet to come on line. The technology has a lot of maturing to do at this point.


Anything carbonecous will work.
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Postby Vexed » Wed 01 Jun 2005, 20:04:19

$this->bbcode_second_pass_quote('', 'T')he eyes of the world have been on this Missouri town for several years to see if a New York businessman can really turn turkey leftovers into oil.

The answer: A resounding yes. In fact, a revolutionary plant is turning 270 tons of poultry waste into 300 barrels of crude oil every day.


I'm no expert on this subject. (So check my math!).

According to the quote above, taken from the Kansas City Star article, am I to understand that at current production rates we have done the miraculous and managed, after "several years" of research, to turn a little under 1 TON of turkey into a little more than 1 barrel of crude oil? Or about 45 gallons?

That's pretty amazing.

But... and perhaps I am being a wee bit facetious here, wouldn't that mean if (right now) we wanted to replace the world's current oil use of 82 million barrels a day with TDP, we would need about 74 million tons of poultry waste PER DAY?

Or more than 27 Billion Tons a year?

How many turkeys does it take to produce one ton of turkey guts? Let alone 27 billion tons?

I understand anything "carbonecous" works, so the poultry metaphor doesn't completely fly, but can you really come to terms with what 27 billion tons means?

Do we come anywhere close to even producing that much USABLE waste a year?

It seems like this process could be enormously useful on a local level, but much more complicated on a global scale...

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Postby 0mar » Wed 01 Jun 2005, 20:15:55

That's the crux of the argument. You would need something like 2,000 plants to produce a million barrels of oil, not to mention feedstocks.
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Talking Turkey

Postby Optimist » Mon 06 Jun 2005, 18:29:15

Hey Omar,
You have been stuck on this for a long time now. Let us try this one more time:
1. The MO plant has a stated capacity of 500 bbl/day.
2. The capacity is based on the available feedstock (200 t/d of turkey waste).
3. Using the same method, a future plant could have a much larger capacity, depending again on how much waste is available for processing.

Then again, you may not want to understand...
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Postby 0mar » Mon 06 Jun 2005, 19:03:38

I wonder if that plant is making money! Last I checked, it was running of a DoE grant. Most successful businesses don't need government grants to run.

Even at a 1,000 barrels, double the capacity, it would take a 1,000 plants to make a million barrels of oil. A plant can't be scaled up 50x to make 25,000 barrels of oil, the capital isn't there. 1,000 barrels per day looks to be the maximum feasible limit right now.
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TDP potential

Postby Optimist » Mon 06 Jun 2005, 19:29:56

You still need to explain how you calculated the 1,000 bbl/d. If you have enough waste, there is no reason why 25,000 bbl/d would not be possible.

As for the economics: it is just a matter of crude being expensive enough. Right now, I believe it costs $80/bbl to produce oil at the MO plant. Out of that $15-20 is paid for the waste. Assuming you can get free waste (if you look hard enough, you might even find applications where you would be paid to take the waste), the remaining cost is $60-65/bbl. So right now the process does not make economic sense.

But give PO some time. As crude oil production gradually decreases, the price would go up. At some point, ($100/bbl?) TDP oil becomes a bargain and the oil companies start building plants all over the place.

So there you have it. Saved by capitalism. Again!
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Postby 0mar » Mon 06 Jun 2005, 21:06:23

Plants are limited by physical size. I haven't seen anyone (CWT) even talk of 25,000 barrel capacity. They say they are scalable to about 1,000 bpd, straight from the horses's mouth.
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TDP size

Postby Optimist » Tue 07 Jun 2005, 12:45:31

What are you on about? Are you implying that a reactor cannot be made bigger that a certain size? How does that work? Why would "physical size" limit TDP to 1,000 bpd, but not traditional refineries? I am affraid you make no sense.

TDP is still in development. They are still ironing out various issues. Just because nobody has spoken publicly about 25,000 bpd, does not mean it cannot be done. In fact, even when people think something is impossible, it does not mean it is impossible. See Roger Bannister and the four minute mile.

Heck, there is no reason why they can't do 250,000 bpd!
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Re: TDP size

Postby big_rc » Tue 07 Jun 2005, 14:40:58

$this->bbcode_second_pass_quote('Optimist', 'W')hat are you on about? Are you implying that a reactor cannot be made bigger that a certain size? How does that work? Why would "physical size" limit TDP to 1,000 bpd, but not traditional refineries? I am affraid you make no sense.

TDP is still in development. They are still ironing out various issues. Just because nobody has spoken publicly about 25,000 bpd, does not mean it cannot be done. In fact, even when people think something is impossible, it does not mean it is impossible. See Roger Bannister and the four minute mile.

Heck, there is no reason why they can't do 250,000 bpd!


Why are you being so difficult? Do you realize that at 25,000 bpd they would need 10,000 tons of turkey guts each and everyday. So yes there is a reason why this process is going to be very hard to scale up and it involves the astronomical amount of waste/feedstock that has to be produced in order to feed this process. At some point, a waste producer cannot affordably expand the operations to accomodate a 250,000 bpd plant and until CWT gets that 500 bpd plant to work anywhere near advertised, nobody is going to give these guys the time of day.
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TDP scale

Postby Optimist » Tue 07 Jun 2005, 16:15:13

Well, excuse me for being "difficult", but we are living in a world where waste disposal is becoming a huge a problem (in case you have not noticed). The "astronomical amount of waste/feedstock" is just a by-product of modern life, much like the "paperless office" is producing mountains of waste paper. Whatever the problems with CWT's technology, getting enough feedstock is not one of them.

And, talking to Omar, do you have a reference for this statement?
$this->bbcode_second_pass_quote('', 'T')hey say they are scalable to about 1,000 bpd, straight from the horses's mouth.

I guess I was not paying attention when that statement came form the horse's mouth...
$this->bbcode_second_pass_quote('', 'u')ntil CWT gets that 500 bpd plant to work anywhere near advertised, nobody is going to give these guys the time of day.

Wrong again. If PO come to pass, and crude hits $100/bbl (or $150 or $200), many investors are going to come rushing.

Sorry to burst your pessimistic bubble, but TDP is the perfect answer to PO. The higher the price of crude, the better for TDP!
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Re: TDP scale

Postby 0mar » Tue 07 Jun 2005, 23:54:17

$this->bbcode_second_pass_quote('Optimist', 'S')orry to burst your pessimistic bubble, but TDP is the perfect answer to PO. The higher the price of crude, the better for TDP!


I can't find a source for that 1000bpd comment, so I might have been smoking crack or something. We'll just keep it at 500 bpd then.

$80 a barrel oil effectively self destructs the economy. At least that's the consensus among economists. So even if TDP is profitable at $80 crude, it won't help.
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TDP cost

Postby Optimist » Wed 08 Jun 2005, 20:03:59

$this->bbcode_second_pass_quote('', 'I')n a peak oil world the basic concentrated industrial-agriculture model fails. Food will be localized. It costs LOTS of energy to grow and ship feed corn, to incubate baby turkeys, to house and move turkeys to a processor, to process turkeys.

You seem to think oil will disappear overnight. That won't happen. Over the last 35 years US oil production has fallen by 36% ( http://www.msnbc.msn.com/id/8124325/ ), or about 1.27% per year. Global production would probably follow a similar decline. Say after me GRADUAL. Lots of time for alternatives to penetrate the market. And with higher oil prices, many will work on this.
$this->bbcode_second_pass_quote('', 'T')he relative cost of the guts remains the same--expensive.
No, the relative cost of the guts remains the same--FREE!
$this->bbcode_second_pass_quote('', 'G')eologist Kenneth S. Deffeyes remembers as a young man being instructed that as soon as a barrel of oil hit $5 (it was $2-3 at the time) then oil shale would be make Colorado rich because it would become magically economical to extract it. It is ALWAYS going to be too expensive to extract. The same can be said about biomass etc.
I am not familiar with what was said to Kenneth S. Deffeyes. I was probably based on a preliminary cost estimate. Thanks to the MO plant, TDP can be evaluated using REAL numbers. Big difference.

In conclusion, here's what we have:
1. Oil will run out.
2. It will not happen overnight. It will happen gradually.
3. Oil gets more expensive.
4. Eventually alternatives are cheaper than oil.

Not too hard to follow, is it?
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Re: TDP cost

Postby ubercrap » Wed 08 Jun 2005, 21:22:15

$this->bbcode_second_pass_quote('Optimist', '')$this->bbcode_second_pass_quote('', 'I')n a peak oil world the basic concentrated industrial-agriculture model fails. Food will be localized. It costs LOTS of energy to grow and ship feed corn, to incubate baby turkeys, to house and move turkeys to a processor, to process turkeys.

You seem to think oil will disappear overnight. That won't happen. Over the last 35 years US oil production has fallen by 36% ( http://www.msnbc.msn.com/id/8124325/ ), or about 1.27% per year. Global production would probably follow a similar decline. Say after me GRADUAL. Lots of time for alternatives to penetrate the market. And with higher oil prices, many will work on this.
$this->bbcode_second_pass_quote('', 'T')he relative cost of the guts remains the same--expensive.
No, the relative cost of the guts remains the same--FREE!
$this->bbcode_second_pass_quote('', 'G')eologist Kenneth S. Deffeyes remembers as a young man being instructed that as soon as a barrel of oil hit $5 (it was $2-3 at the time) then oil shale would be make Colorado rich because it would become magically economical to extract it. It is ALWAYS going to be too expensive to extract. The same can be said about biomass etc.
I am not familiar with what was said to Kenneth S. Deffeyes. I was probably based on a preliminary cost estimate. Thanks to the MO plant, TDP can be evaluated using REAL numbers. Big difference.

In conclusion, here's what we have:
1. Oil will run out.
2. It will not happen overnight. It will happen gradually.
3. Oil gets more expensive.
4. Eventually alternatives are cheaper than oil.

Not too hard to follow, is it?


How do expensive alternatives make energy cheap again? Nobody said oil was running out anytime soon, but I am certain of one thing, no matter how you slice it, expensive alternatives means average first world folks will be using using far less energy in the future, and everybody else has a good chance of using none.
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TDP & the future

Postby Optimist » Thu 09 Jun 2005, 12:54:22

I have no idea what energy prices will do in the future, there are simply too many factors affecting it. What I am arguing against is the melt-down scenario that most on this board seem convinced is unavoidable and some even appear to be looking forward to.

Some thoughts:
Do we need cheap energy? Moderately expensive energy may not be such a bad thing - it would encourage everybody to use energy wisely and to save it where possible. It would also encourage research into alternative energy and energy saving, unlike what we have seen in the last decade or two.

Would alternatives remain expensive? Again, who knows what prices will do. But as alternatives get market share and start competing against each other, it is hard not to believe that continuous improvement will bring prices down over time.

As for the third world, they may discover that high energy prices make it too expensive to fight wars and oppress people. How tragic would that be?
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Articles that don't help the cause

Postby pea-jay » Tue 05 Jul 2005, 15:24:18

Peak Oil may be getting more mainstream media attention, but that may be a mixed blessing. At worst, it will lull folks into a false sense of security. Case in point, this article (which doesn't mention peak oil or even limitations) that discusses the future of energy.

$this->bbcode_second_pass_quote('', 'I') discovered something amazing recently and I tried to tell a bunch of friends about it. A guy in Illinois has, it seems, invented a device that can turn almost anything into oil, plus a few byproducts (all useful).

...

Inventor Paul Buskis is not planning to process people, of course. He's going after trash. His thermo-depolymerization process works on any carbon-based substance--chicken entrails, tires, plastic milk jugs, you name it. Garbage in, oil out--that's the promise.

My friends scoffed. "Sounds too good to be true," was their consensus. "It'll never work."

Ah, but it's already working. A company called Changing World Technologies has built a plant in Carthage, Missouri, based on Buskis's process. It's producing 400 barrels of oil a day right now, extruded from the wastes of nearby turkey processing plants. The company is building another plant in Philadelphia to process sewage into black gold.

My friends would have none of this. They assured me the invention will emit toxic pollution. (It doesn't.) It will use more energy than it produces. (Quite the opposite.) It's voodoo science: "How can oil be created?"

Well, it's been done before. The earth created oil by heating, cooling, and squeezing the rotted remains of plants and animals. Buskis replicates that process mechanically. What took millions of years in nature, his process achieves in a day.


Ah, yes. Thermal depolymerization. The stench issue aside, no consideration was given to the fact you would still need to feed it all of that waste to create oil. Most of that waste material, incedentally create by consuming or using oil in the first place.

Didn't TD get debunked somewhere in here already?

He goes on...

$this->bbcode_second_pass_quote('', 'W')hat's a Cynic to Do?
Today, most of our electricity comes from a few big power plants that use coal, oil, gas, or nuclear fuel. At this point, therefore, even electric cars run on fossil (or nuclear) fuel, since you have to plug them into the grid to recharge them.

Yet even now electricity doesn't have to come from just a few sources. It can come from any number of generators, they can be of any size, and the electricity they supply can come from any source including wind and sunlight. Electricity is electricity.

What's more, right now you can buy a wind or solar generator that will not only power your household devices but send electricity into the grid: That technology exists.

If you live in Germany and have such a generator, you can definitely sell the power you produce because German law requires utilities to buy it. In 2001, in fact, the German government started paying subsidies to people who installed such renewable energy devices in their homes.
...
But even if the usage keeps growing at the current rate, Germany expects to generate 14 percent of its electrical power from non-polluting renewable sources by 2010. Much of this will come from generators owned by individual households.

My inner cynic is feeling cornered. I'm thinking: Why can't we do that?


Because the existing sources of electricity (fossil fuels) still fuel a majority of generation today, the renewable sources intermitent and not dispatchable and in the case of solar requiring sizable upfront energy investments. And would electrical increases really remain steady? Oil (and gas) substitution requires additional energy increases beyond what we were planning on.

Finally, lest any good discussion of "alternatives" skip hydrogen, he delivers.

$this->bbcode_second_pass_quote('', 'L')et's say you have a solar generator on your roof and a hydrogen-making mini-plant in your basement. Anytime your solar generator makes more energy than you're using, the excess flows to your basement and makes hydrogen.

Later, when the sun isn't shining, your fuel cells kick in and you draw down on your hydrogen supply.

If your hydrogen tanks fill up, the excess energy flows into the grid. When the grid has more power than it can sell, the excess goes to big electrolyzers that store energy as hydrogen on a commercial scale. The massive fuel cells then emit energy as needed to keep the overall supply constant.

In this system, more or less everybody produces energy. They sell to the grid when they have more than enough. They buy back when they're running a deficit.


Hydrogen, ever ubiquitous in energy discussions and always elusive in real-world applications. Okay so how much energy would get fed back into the grid really, when H2 production is going on in the basement? And even if a bare surplus balance were to occur between the house and the grid, could that difference power those living in apartments plus all those nonresidential uses such as offices, factories, schools. To be sure some of those buildings could also be generators of electricity, but I don't think he has taken the time to calculate the EROEI or even if the total wattage of the proposed generation would still be enough to power our way of life.

Articles like this are not the slightest bit helpful and lull many into a false sense of security. "Don't worry...technology will save us" or my favorite (NOT) "The stone age did not end because a lack of stones."

Full article: http://encarta.msn.com/encnet/features/ ... _after_oil
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Postby MicroHydro » Tue 05 Jul 2005, 15:34:15

People are going to bite on every energy scam that comes down the pike, just like in the 1970s. PT Barnum was right.

One just has to take human nature into account. I don't believe in the hydrogen economy or fuel cells, but I know that the techno-optimists will give them a try. So I invested in a platinum mining company.
"The world is changed... I feel it in the water... I feel it in the earth... I smell it in the air... Much that once was, is lost..." - Galadriel
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Postby Choon » Tue 05 Jul 2005, 15:48:08

I was really pleased when one of Malaysia's more popular bloggers wrote about Peak Oil.

http://www.jeffooi.com/archives/2005/07/peak_oil.php

Wasn't so happy when the comments came streaming in. That last commenter shrugged off PO based on...

http://www.the7thfire.com/peak_oil/peak ... lation.htm
http://www.vialls.com/wecontrolamerica/peakoil.html

:? I can understand it if people don't believe about PO because "the market will provide", but for those that read a website that starts with "The Seventh Fire is a means to Soar beyond mind. Enter through the Heart"???

I think I've just seen a new low on how desperate people want to hear good news, no matter who says it.
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Postby aahala » Tue 05 Jul 2005, 16:41:42

The Carthage, Missouri turkey plant was discussed in a thread here the
last few weeks.

It's the "mother of foul odors." After many complaints, the state finally
was able to get the plant to agree to reducing the smell; I haven't heard
if things have improved.
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