----- Original Message ----- From: "David B. Benson" <[EMAIL PROTECTED]> Newsgroups: gmane.science.general.global-change To: "globalchange" <[email protected]> Sent: Wednesday, January 30, 2008 5:30 PM Subject: [Global Change: 2402] Re: Bury charcoal
> > On Jan 27, 4:18 am, "Don Libby" <[EMAIL PROTECTED]> wrote: >> ... Don't burn >> biomass: pyrolize it and hire a bunch of ex-coal miners to shove it down >> a >> mine shaft, then sell your carbon credits to pay off your loan. > > Even better is to use hydrothermal carbonization to produce biocoal. > Your ex-coal miners will recognize even more easily and it is a bit > denser. In addition, the reaction is sufficiently exothermic that you > can generate some electrical power while making biocoal. > Interesting idea. I'm not precisely sure how the economics work out for biocoal but I've gathered that charcoal can be produced at about $70 per ton, which is about 5 tons CO2 equivalent, which makes the process break even if carbon credits sell for $14 per ton CO2 equivalent sequestered - currently credits can be bought for between $10-$20. Looks promising. http://www.hnei.hawaii.edu/bio.r3.asp#newsitem New J. Chem., 2007, 31, 787 - 789 Back in the black: hydrothermal carbonization of plant material as an efficient chemical process to treat the CO2 problem? Maria-Magdalena Titirici, Arne Thomas and Markus Antonietti -dl --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups Global Change ("globalchange") newsgroup. Global Change is a public, moderated venue for discussion of science, technology, economics and policy dimensions of global environmental change. Posts will be admitted to the list if and only if any moderator finds the submission to be constructive and/or interesting, on topic, and not gratuitously rude. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/globalchange -~----------~----~----~----~------~----~------~--~---
