——– Forwarded Message ——–
| Subject: | Re: [biochar] An open-source biomass pyrolysis reactor |
|---|---|
| Date: | Sat, 16 Sep 2017 18:19:24 -0500 |
| From: | Paul Anderson <psanders@ilstu.edu> |
| To: | biochar@yahoogroups.com |
All,
found to be $580 000 for a 250 kg h-1 unit.
That becomes $2320 per kg per hour investment.
If operated 20 hr per day, that would be $116 per kg (check my calculations).
Just for comparison, one Champion TLUD stove (FOB factory in Kolkata) costs $40 and can be used daily to produce about 1 kg of char per day while accomplishing other socio-economic benefits. That is about 1/3rd the device-cost per kg. Issues of labor for operations plus feedstock and the “cost of capital” to raise over a half million dollars still need to be considered.
the pyrolysis unit described here [Woolf et al] promises to provide an affordable and efficient open-source design that can be fabricated locally in developing countries
I do not quite find that to be a justifiable statement, especially for developing countries.
I hope that others will send comments to refute me or to agree with me.
Side note: It will probably be easier to raise $580,000 for that experimental device than to obtain $193,000 (one third of their amount) to put 4800 Champion TLUD stoves into 4800 needy households, for which there are known results and multiple benefits.
Paul
Doc / Dr TLUD / Prof. Paul S. Anderson, PhD Email: psanders@ilstu.edu Skype: paultlud Phone: +1-309-452-7072 Website: www.drtlud.com
006f01d32f11$bcc7da40$36578ec0$@trmiles.com“>
Woolf, D., Lehmann, J., Joseph, S., Campbell, C., Christo, F. C. and Angenent, L. T. (2017), An open-source biomass pyrolysis reactor. Biofuels, Bioprod. Bioref.. doi:10.1002/bbb.1814
http://onlinelibrary.wiley.com/doi/10.1002/bbb.1814/full
An open-source biomass pyrolysis reactor
Abstract:
Despite its long history of technological development, much charcoal production still relies on polluting and inefficient technologies utilizing traditional kiln designs. In addition to the need for improved charcoal production systems, the growing interest globally in pyrolysis of biomass to generate biochar as a soil fertility improver and for climate change mitigation may drive an increasing demand for such technologies. Accordingly, there is a clear need in developing countries for access to safe, affordable, and efficient open-source designs and technology that can be fabricated locally. The design described here includes computational fluid dynamics modeling which demonstrated that the design exhibits a stable flow and combustion pattern. A hazard and operability (HAZOP) study, mass and energy modeling, and costing of all components and fabrication were also conducted for a prototype kiln that will accept up to 250 kg biomass h-1. Fabrication and installation costs were estimated using actual commercial quotations based on detailed engineering drawings and design, and were found to be $580 000 for a 250 kg h-1 unit. We therefore find that this pyrolysis system promises to be economical on a small scale. It can utilize waste lignocellulosic materials for feedstock, thus alleviating demand pressure on woodlands to provide feedstocks. It was, therefore, concluded that the pyrolysis unit described here promises to provide an affordable and efficient open-source design that can be fabricated locally in developing countries without licensing restrictions or royalties. © 2017 The Authors Biofuels, Bioproducts and Biorefining published by Society of Industrial Chemistry and John Wiley & Sons Ltd
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