Feedback Mechanism May Raise Warming Beyond Previous Estimates
New York Quadruples Number of Alternative Fuel Medallions for Next Taxi Auction

Waste-to-Diesel Pilot to Go Online in June

Rendering of the Clyvia plant.

Clyvia Technology GmbH, the German subsidiary of US-based Clyvia Inc. (formerly Rapa Mining), will officially introduce its pilot waste-to-diesel production facility in June at the company’s Wegberg-Wildenrath location.

Clyvia Technology uses catalytic depolymerization to transform carbon-containing waste material such as used oil, flushing oil and plastic from output materials to diesel or heating oil. The thermal treatment process—similar to the cracking of crude oil—shortens the long hydrocarbons in the waste to the length of diesel or heating oil.

This method was developed, tested and proven at the end of the 1970s by BASF AG and Aral, although conditions at the time were not suitable for profitable operation. In the course of the last 10 years, Clyvia has optimized the method and tested it under laboratory conditions.

In the Clyvia system, the input raw materials are fed into a reactor containing a mixture of circuit oil and a catalyst compound to accelerate the process. A pre-heated liquid and steam mixture is introduced to the reactor, heating the compound to a reactive temperature of approximately 300° C to 400° C. At this point, the longer hydrocarbon molecules crack into shorter hydrocarbon molecules and evaporate.

The evaporated hydrocarbon molecules are then led to a fractional distillation plant which cools the vapor and extracts diesel and/or heating fuel. Separating the distillation component from the reactor component of the plant results in an extremely clean end-product, according to Clyvia.

One hurdle Clyvia has faced is the production of large amounts of undesirable and toxic byproducts, including chlorine, fluorine and coke. The process being developed by Clyvia Technology resolves these issues by binding these substances in the form of salts at temperatures of 260° C to 280° C before the splitting process occurs.

The Clyvia process splits the longer molecules without forming methane, meaning that the Clyvia system does not produce major quantities of coke. The system is different from pyrolytic processes used to split hydrocarbon molecules, which require extremely high reactive temperatures, significantly increasing the cost of the process, and producing high amounts of waste carbon byproduct.

Using a new catalyzing agent, the Clyvia system has been able to maintain constant catalyst activity even in the presence of chlorine and fluorine, which normally interfere with the depolymerization process.

However, in its current stage of development the Clyvia technology does not produce diesel fuel that meets low-sulfur requirements, although it did meet “most” of the fuel parameters required under international fuel standard DIN 51603-1, according to Clyvia’s most recent annual report.

Clyvia management blames additives in the recycled waste oil used as the input material as the source of the excess sulfur. The next round of development and testing—to occur in the new pilot plant—will focus on producing diesel fuels that meet necessary sulfur content requirements.

Earlier this month, the German patent and trade mark office in Munich issued Clyvia a patent (no. 102005010151) for its depolymerization process, as well as for the apparatus needed to realize the process.



How does this process compare to Thermal Conversion/TDP?


An Indian slant on waste plastic to fuel at:
Good News India.

allen zheng

Another take on making waste into something usable:

An Engineer

How does this process compare to Thermal Conversion/TDP?
Not having seen a ton of information on the Clyvia process I would venture the following:
- Clyvia seems to be focused on waste oil, plastic, etc. In other words, energy-dense waste products, which would essentially be free of water. TDP/TCP can handle wet waste. The Carthage facility converts mainly turkey grease into oil. In other words, it convert renewable biological fat/oil into hydrocarbons.
- Clyvia's poduct is high in sulfur. TDP/TCP's product appears to be low in sulfur. Unfortunately, one would judge from the persistent odor complaints, that most of the sulfur ends up in emissions. Hopefully enough ozone will take care of that.
- Neither process has a proven ability to convert the most abudant renewable waste (cellulose) to oil, though both claim the ability to convert "carbon-containing waste" to oil. Let's see who can put the money where the hot air is...

Alejandro Campain

Dear Sirs,

Please guide us with certain questions.

In first places we need to send us the ROI, complete InfoTech and we work with you.

1. - what kind of equipments should we acquire locally?
2. - is one plant to treat plastics and another to treat used oils? or,
3. - can it mix in the same plant it oils and plastic?
4 - What yields are they reached in plastic and oil?
5. - how many Kw. does it consume the plant?
6.. - time of delivery?
7 - How much costs the plant and its capacity of daily production

Kind Regards,

Alejandro Campain
Orion Group Ltd.
TelFax: +593922506862/3/4
Móvil: +59392117450
Skype: alejandro.campain
Quito - Ecuador

Davood Vakili

Dear Sirs,
please clarify me:
1- whether this technology can process the PET bottles waste tp produce petroleum cuts? if yes, what about the results? how much of products could be reached from 1 m3 of such wastes? what about the process costs?
2- please let me have some indications about the price of the process you have invented to produce diesel / gasoline from the waste plastics (e.g. PET).
kindest regards,
Davood Vakili


dear sir,
if anyone can offer a plant capable of extracting 10ton/day oil used for fuel in furnace can send me the proposal,the plant will be installed in dubai

The comments to this entry are closed.