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Open proposal on GlidArc assistance for solid matter gasification

November 2012

 

Simple and cheap gasification technologies can come back for any biomass, any organic waste … or coal to syngas generation! Their main drawback is a presence of tars. But instead of removing them by filters – we are proposing to rather increase (yes!) their concentration in the producer gas and apply our 2nd step of total conversion of highly abundant tars, vapors, hydrocarbons, and other volatile carbonaceous molecules into an extra amount of very clean synthesis gas (H2 + CO) using our GlidArc-assisted selective partial oxidation.

 

The main target of gasification step becomes therefore only a separation of ashes, minerals, and metals from all other volatile elements and compounds that gives a very "dirty" producer gas. The GlidArc step then deals with all complex molecules and converts them totally into H2 and CO. A specific property of this step is its selectivity: H2 and/or CO present in initial producer gas are not attacked in the process so that more syngas is generated! At least 3 vol.% of cumulated Carbon (in any form except CO and CO2) is necessary in the "dirty" producer gas for this technology.

 

Our preliminary runs have already indicated the feasibility of proposed strategy of rather dirty than clean gasification. Full-scale industrial tests are prepared. There is no upper limit of light tars content in the producer gas. There is no limit of the gas upper temperature so that the GlidArc can reuse a residual heat of gasification. Figure shows the concept of such integrated system of dirty gasification followed by hot producer gas reforming/cleaning.

 

 

Last minute: We are now converting heavily tar-charged pyrogas into clean syngas. Two pyrolysers (20-L batch and 2 kg/h continuous units) are installed in ECP’s facility. They are on-line feeding our Plasma Assisted Tar Oxidizers (PATO) units… See how completely different are flames when burning a pyrogas and the syngas produced from the same pyrogas: http://youtu.be/Sx9B4LnMyPs

 
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Open proposal on
Fischer-Tropsch reactors and catalysts for syntheses of liquid fuels

November 2012

 

ECP has many years of experience in the FT conversion of CO + H2 mixture (syngas) into liquid fuels. Moreover, we accumulated significant experience on fixed-bed FT reactors such as:

a)     Industrial tubular units using Cobalt catalysts in Poland and in Russia,

b)     Small laboratory FT setups in Moscow and Orleans (atmospheric and then in pressurized reactors, the both with various Cobalt catalysts),

c)     Large laboratory FT setup in ECP (5-m high, 1-inch diameter, 20 bar steel with a Cobalt catalyst).

 

We concluded that huge multi-tubular steam-cooled FT reactors (since 1935) are not adapted for a small or medium scale. As result ECP has invented a sandwich-type compact multiple plate FT reactor.

 

In parallel, we have also developed our GlidArc-assisted reformers of various fossil and renewable liquids and gases into syngas. We are now able to totally reform:

Natural gas of any composition (including H2S), Biogas (even at high CO2 content), Bio-Methane, LPG, waste flared gases, crude "producer gas" from biomass pyrolysis or gasification, various vegetable oils (including waste ones), waste alcohols, waste liquids from coke production, liquids or tars from biomass gasification or pyrolysis, glycerol from biodiesel production, and other feeds.

 
 

 

 

 

 

 

 

 


We have reached a scale of 22 m3(n)/h of continuous output of pure Syngas. Once compressed, this real syngas is used for feeding our FT reactors installed in our facility:

o               One-tube (14/12 mm) 0.25-L reactor,

o               One tube (20/18 mm) 0.65-L reactor,

o               Two-plates and eight-tubes (20/18 mm) 5.5-L reactor,

o               One tube (60/52 mm) 6.4-L reactor.

 

The FT synthesis temperature (can reach 350°C) is controlled as well as the output pressure (up to 30 bar) and the input syngas flow-rate. The entering syngas and products leaving the FT units are on-line analyzed using our gas chromatographs. Liquid products are collected at 0°C for further analyses. Our reactors have a test capacity up to 1 kg/h of FT fuel simulating typical industrial conditions…

 

Iron-based FT catalysts are advantageously adapted to these FT reactors. Such catalysts accept various syngas mixtures at much wider H2/CO molar ratios than the Cobalt-based fragile catalysts. We are manufacturing our own catalysts. Our real syngas generated from various fossil and renewable feeds via ECP's reformers is used for three successive operations: catalyst precursor reduction, its activation/accommodation, and final continuous FT synthesis (several weeks). All these operations take place in the same FT reactors.

 

ECP believes our GTL system will be superior because of its compact packaging. For example, it can be built on barges for offshore plants, at very remote area or even at a single shale gas well. We believe that ECP's GTL technology will be simple and "low cost".

 

We hope our FT-related syngas generators, high-pressure syngas transfer equipment, and prototypes of FT reactors may be used for designing a specific test-setup at as close as possible final Biomass-to-Liquids conditions. We are also ready to perform long tests of other FT reactors and catalysts on request…

 

 

 

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Contact us: echph@wanadoo.fr