G4 Insights Inc. - Renewable natural gas from biomass

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Permalink Reply by Edson Ng on October 14, 2009 at 3:08pm

I would like to thank everyone who downloaded the G4 presentation. I trust the information was useful and please feel free to post comments or contact me if you require more information. Apparently the link did not work reliably so just drop me an email and I will send it directly to you. Thanks.

Edson
edson@g4insights.com

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Permalink Reply by Johnny on November 11, 2009 at 8:31am

Have you actually demonstated the process? The presentation you provided seems to be more conceptual in nature than a report on actual demonstration-scale performance.

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Permalink Reply by Edson Ng on November 12, 2009 at 10:54am

Hi Johnny,

The G4 process is a variation on fast pyrolysis which is a well established approach for conversion of biomass to fuels and chemicals for over 25 years. Do a web search on "fast pyrolysis" to see activity in the area. Most fast pyrolysis efforts have been focused on production of hydrogen, syngas (mix of H2 and CO), or liquid fuels and chemicals. G4's primary focus is the production of methane gas.

We have confirmed our process in the lab and currently working on a demonstration unit. Under the current plan, we are about 3-5 years away from the first commercial scale plant.

Sorry for the lack of details in the presentation. The presentation was prepared for G4's first public disclosure of its bio-natural gas technology at the International Energy Agency conference. Details were limited due to time constraints and the non-confidential content intended for a general audience. We will keep the board updated as we make further progress and I will do my best to answer any questions posted here.

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Permalink Reply by neil cox on November 13, 2009 at 4:04am

Syngas does solve the problem of what to do with the oxygen in the cellulose and moisture content of the biomass = It becomes carbon monoxide = CO. CO is a feed stock for certain other biofuel methods = alcohol?, So it does have local value = we would not want to ship large quantities of CO because it can be fatal at one part in 10,000 in breathing air.
Does G4 convert other components of wood (besides cellulose) to methane or something useful? Can G4 be adapted to tree leaves? Any chance you can make a tiny system available for private homes to make fuel from yard leaves and twigs. I could likely get 100 pounds per week with some input from nearby neighbors, year around as half the trees in Florida shed leaves and twigs every month of the year. Is it practal to inject small quantities of methane or hydrogen into a propane or butane tank? I presume the burner would get only a litle propane until most of the methane was burned..
I hope platinum is a minor G4 catalyst as the world supply of platinum is already stressed. Neil

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Permalink Reply by Edson Ng on November 13, 2009 at 10:02am

Hi Neil,

The G4 focus is large scale, economic production of renewable natural gas. We do not seek or require secondary products to make the process commercially viable. The G4 process is designed for cellulose, hemicellulose, and lignin feedstock. It can also use all parts of the tree including needles, leaves, bark, and roots. However, there are limits on what should be collected due to sustainable forestry management practices. The smallest commercial plant we are planning at this stage is 400 GJ/day which is suitable for remote communities or campus/institution applications. For residential biomass, it may be more economic and practical to collect the tree trimmings and process centrally along with city tree trimmings and clean construction wood waste. The G4 process is not dependent on exotic catalysts.

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Permalink Reply by neil cox on November 13, 2009 at 5:24pm

Why did you specify clean construction wood waste? It does not appear that 1% paint, varnish, plastics nor steel would interfere much, but several percent drywall, plaster, shingles, paper, dirt, cement rubble or carpet might.
Collecting yard waste to central processing may double the cost of the methane produced and is considerable effort for the home owner. In theory the home owner can make methane or other fuel for little extra effort, and some home owners would regard their labor as free, even if the yield was only one gallon per week, gasoline equivelent. There may also be significant waste heat that could preheat the home hot water supply. Neil

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Permalink Reply by Edson Ng on November 13, 2009 at 9:17pm

Hi Neil,

I can only speak for the G4 process. We are concentrating on forestry residue at this point as the market opportunity is already very large at $40 billion/year in potential renewable natural gas sales. Additional feedstocks including contaminated construction waste and agriculture residues could be considered later. I specified clean construction wood waste because it is identical to forestry residue as far as the G4 process is concerned. Methane containing gas could be made economically on a small scale for home use but the gas would not be pipeline grade natural gas which is the G4 objective.

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Permalink Reply by neil cox on November 14, 2009 at 4:59am

I can guess some impurities that need to be removed: nitrogen and oxygen from the air that went into the reactor with the feedstock = it would be moderately costly to pump the reactor to high vacuum to remove the air, besides you likely want to do continuous feed instead of batch production. Methanol = methyl alcohol = wood alcohol which is produced by the destructive distillation of wood. Carbon dioxide and carbon monoxide and water vapor plus trace amounts of hundreds of chemicals including dioxin which is dangerous even at one part per billion. Some application is likely injured by even trace amounts of any chemical not found in similar ratios to natural gas from the ground. I do realize that natural gas varies in composition and needs some purifying to meet pipe line standards. Neil

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