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Pyrolysis Of Tyres To Produce Co2 And Hydrogen

pyrolysis syngas water gas shift reaction separation of co2 separation of hydrogen safety of operation heat transfer flow calculation temperature of reaction

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#1 pyrolysisproject

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Posted 06 June 2022 - 09:32 AM

Hi. I am working on a project where we take waste tyres and municipal solid waste at a landfill and we use a pyrolysis machine to produce syngas and pyrolysis oil.  The pyrolysis oil is used for heating the machine and other processes and the syngas which has the composition of CO, CO2, H2, CH2, C2H4, C2H6, C3H5 and other gases.  I want to use water gas shift reaction to convert the CO into CO2 and H2.  What is the temperature needed for this reaction?

After we get CO2 and H2 then we separate CO2 and H2 from the mix to be sold separately. CO2 will be sold mostly to an oil company that will use it to pump oil out of old wells and H2 will be sold to other buyers.

For separation I am using pressure swing adsorption. I want to calculate the operational costs of producing CO2 and H2 to see if it is feasible or not.

 

 

I made a google doc to share info

 

https://docs.google....eoc8AsD085j/pub

 

 



#2 Bobby Strain

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Posted 06 June 2022 - 12:01 PM

You need not walk away from this, but RUN! This stuff has been around for 40+ years. I saw it twice.

 

Bobby



#3 pyrolysisproject

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Posted 07 June 2022 - 10:25 PM

ok. Thanks Bobby.

This is not the answer i was expecting. but I guess this is something i should get out of.

may i ask why? what is the problem with this project? just out of curiosity because i put a lot of effort into this project



#4 Bobby Strain

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Posted 08 June 2022 - 10:13 PM

Old tire pyrolysis yields only nasty stuff. Lots of liquid and noxious gases. Nothing good can be recovered from this mess. But, what would one expect from material that is made from butadiene and styrene, crosslinked with sulfur. Gimmicks are offered by promoters who walk away with a pocket full of money from investors who should know better. My last encounter 20 years ago was with an unscrupulous engineering company where I worked. I told the business development person that they should be honest with this client and refuse to take their money. Well, they all ganged up on me. I spent some time on the project, while trying to convince people to stop the charade. It only got worse. The client was led by a promoter who would better perform in a circus.

 

The first encounter was less involved. This was ~ 35 years ago. A promoter wanted to get Bechtel to invest and develop a project. They brought several volumes of data about discarded tires. They promoted the great economics of generating electricity with the pyrolysis products. Supposedly developed by a PhD chemical engineer. I spent a couple days looking it over. It was a scam relying on phony arithmetic, not sound thermodynamics. Which is what I reported, and it all went away.

 

So, find a worthwhile project.

 

Bobby



#5 breizh

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Posted 09 June 2022 - 01:29 AM

Hi,

you may contact these guys : https://www.biogreen.../tire-pyrolysis

 

Good luck

Breizh 



#6 pyrolysisproject

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Posted 09 June 2022 - 01:41 PM

Hi Bobby. Thanks so much for sharing your experience. I am getting into this to solve a problem society has. We started with municipal solid waste and then the investor asked that we start with something solid so we chose to start with waste tyres. Our main goal is to process waste in general. So what do you suggest can be done to municipal solid waste? Our initial idea was to use separated municipal solid waste. This is done at the landfill we want to work on. Organic material is separate and plastics are separate so we wanted to gassify organic material and pyrolyse plastics. I do not believe in incineration cause whatever you do you can not clean the gasses coming out. Please tell me your honest opinion on what should be done to municipal solid waste ?

#7 Bobby Strain

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Posted 09 June 2022 - 02:21 PM

Look at what Israeli companies have done in the past. I recall some quite large project in the UK 20 years or so ago that was related to this area. But it was stopped after having spent lots of money. I don't know much about this problem of solid municipal waste. We should also be looking at ways to eliminate such waste. But the news always has announcements of new plastic plants being built. This doesn't make a lot of sense. More pressing, however, is mitigating climate change. It's quite threatening and causing harm now.

 

Good luck in your endeavors.

 

Bobby



#8 pyrolysisproject

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Posted 10 June 2022 - 09:42 PM

Thanks.

#9 pyrolysisproject

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Posted 10 June 2022 - 09:49 PM

Thanks so much

#10 IGC

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Posted 15 June 2022 - 03:00 AM

Look at what Israeli companies have done in the past. I recall some quite large project in the UK 20 years or so ago that was related to this area. But it was stopped after having spent lots of money. I don't know much about this problem of solid municipal waste. We should also be looking at ways to eliminate such waste. But the news always has announcements of new plastic plants being built. This doesn't make a lot of sense. More pressing, however, is mitigating climate change. It's quite threatening and causing harm now.

 

Good luck in your endeavors.

 

Bobby

One I can think of from the UK was Tees Valley.  It was an Energy from Waste project by Air Products and there were 2 plants - the first was finished but the second halted after commissioning issues on the first.  In the end, the site was written down after spending approx. $1 billion.  From there, AP shifted focus to industrial gases only and sold off their chemical division. 






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