Comments on: Torrefaction – A New Process In Biomass and Biofuels http://newenergyandfuel.com/http:/newenergyandfuel/com/2008/11/19/torrefaction-%e2%80%93-a-new-process-in-biomass-and-biofuels/ News and Views for Making and Saving Money in New Energy and Fuel Wed, 08 Feb 2012 06:16:51 +0000 hourly 1 http://wordpress.org/?v=3.3.1 By: David Robbins http://newenergyandfuel.com/http:/newenergyandfuel/com/2008/11/19/torrefaction-%e2%80%93-a-new-process-in-biomass-and-biofuels/comment-page-1/#comment-910605 David Robbins Thu, 05 Jan 2012 21:47:03 +0000 http://newenergyandfuel.com/?p=1165#comment-910605 What is the moisture content requirement of the feedstock? We are growers of Miscanthus Giganteus and are adding densification to our production to manage distribution costs. What is the moisture content requirement of the feedstock?
We are growers of Miscanthus Giganteus and are adding densification to our production to manage distribution costs.

]]> By: Haluk http://newenergyandfuel.com/http:/newenergyandfuel/com/2008/11/19/torrefaction-%e2%80%93-a-new-process-in-biomass-and-biofuels/comment-page-1/#comment-787715 Haluk Sun, 27 Nov 2011 15:32:51 +0000 http://newenergyandfuel.com/?p=1165#comment-787715 Does anyone know 1- the cost comparison of terrified mass vs pre-combustion process of coal? 2- the typical cost of preparing coal before it is introduced into furnace in US? Does anyone know 1- the cost comparison of terrified mass vs pre-combustion process of coal?
2- the typical cost of preparing coal before it is introduced into furnace in US?

]]> By: AERTS Michel http://newenergyandfuel.com/http:/newenergyandfuel/com/2008/11/19/torrefaction-%e2%80%93-a-new-process-in-biomass-and-biofuels/comment-page-1/#comment-278982 AERTS Michel Mon, 13 Jun 2011 08:56:30 +0000 http://newenergyandfuel.com/?p=1165#comment-278982 Hi, I run a activated bamboo charcoal production in the Indian Ocean. We have about 8 tons a day of waste: 45% sawdust, 45% wood chips, 10% 1 to 5 cm thinnings. This amounts to 200 tons per month ! I have just ordered two briquetting machines. I use 10% of the total waste biomass to dry in large brick kilns the biomass before briqueting. After briqueting, I would like to torrefy these briquettes in order to make it a suitable commercial torrefied briquette (50% for our use in kilns for pyrolysis and activation) 50% would be for export. I very little litterature on torrefaction: I have read some uses pressurisation, but we cannot become industrial. We are a rural development size. I thought if I use larger brick kilns and keep my briquettes in a 200/300°C without oxygen, I should be doing torrefaction, am I wrong ? The main question for me is: how long must the briquettes be exposed to this temperature ? If anybody has any advice, please, feel free to use my email adress. Kindly, Michel Hi, I run a activated bamboo charcoal production in the Indian Ocean. We have about 8 tons a day of waste: 45% sawdust, 45% wood chips, 10% 1 to 5 cm thinnings.
This amounts to 200 tons per month ! I have just ordered two briquetting machines. I use 10% of the total waste biomass to dry in large brick kilns the biomass before briqueting. After briqueting, I would like to torrefy these briquettes in order to make it a suitable commercial torrefied briquette (50% for our use in kilns for pyrolysis and activation) 50% would be for export. I very little litterature on torrefaction: I have read some uses pressurisation, but we cannot become industrial. We are a rural development size. I thought if I use larger brick kilns and keep my briquettes in a 200/300°C without oxygen, I should be doing torrefaction, am I wrong ?
The main question for me is: how long must the briquettes be exposed to this temperature ? If anybody has any advice, please, feel free to use my email adress. Kindly, Michel

]]> By: Tweets that mention Torrefaction – A New Process In Biomass and Biofuels | New Energy and Fuel -- Topsy.com http://newenergyandfuel.com/http:/newenergyandfuel/com/2008/11/19/torrefaction-%e2%80%93-a-new-process-in-biomass-and-biofuels/comment-page-1/#comment-179557 Tweets that mention Torrefaction – A New Process In Biomass and Biofuels | New Energy and Fuel -- Topsy.com Wed, 16 Feb 2011 21:48:37 +0000 http://newenergyandfuel.com/?p=1165#comment-179557 [...] This post was mentioned on Twitter by Peter de Laat, douglascdale. douglascdale said: Torrefaction – A New Process In Biomass and Biofuels http://t.co/XNep6Fo [...] [...] This post was mentioned on Twitter by Peter de Laat, douglascdale. douglascdale said: Torrefaction – A New Process In Biomass and Biofuels http://t.co/XNep6Fo [...]

]]> By: Brian Blackwell http://newenergyandfuel.com/http:/newenergyandfuel/com/2008/11/19/torrefaction-%e2%80%93-a-new-process-in-biomass-and-biofuels/comment-page-1/#comment-174042 Brian Blackwell Mon, 07 Feb 2011 20:01:30 +0000 http://newenergyandfuel.com/?p=1165#comment-174042 Can you please tell me how much heat is needed in the reactor? What portion of the gross heat in the off-gas from the reactor winds up heating the reactor? What portion of the gros heat in the incoming wood goes to heat the reactor? Thank you Can you please tell me how much heat is needed in the reactor? What portion of the gross heat in the off-gas from the reactor winds up heating the reactor? What portion of the gros heat in the incoming wood goes to heat the reactor?

Thank you

]]> By: Richard Walton http://newenergyandfuel.com/http:/newenergyandfuel/com/2008/11/19/torrefaction-%e2%80%93-a-new-process-in-biomass-and-biofuels/comment-page-1/#comment-35892 Richard Walton Sun, 29 Nov 2009 09:12:53 +0000 http://newenergyandfuel.com/?p=1165#comment-35892 Michael: In answer to your questions: 1) Typically - 10% of the original energy contained in the biomass is driven off in the torgas. This roughly equates to 1.6 Gj (Dry basis) depending on the feedstock. 2)Mass Density of the torrefied pellets is in the range of 800 to 1000KG/m3. mass density of torrefied wood is in the realm of 200 to 250 kg/m3. 3)Volatile content varies with the ultimate calorific value of the torrefied product. At low levels (22 to 23 Gj/tonne) the volatile content is >70%. On High Calorific value (24 to 26 Gj/tonne - Borderline Pyrolysis) the volatile content is much lower. 4)Specific gravity of the torrefied pellets is 1.1 to 1.2 (depending on the CV and Pelletizing process) 5) Cost of torrefaction varies widely with equipment and process used; (capex); power cost; plant capacity, etc. In general however, it is more economical to manufacture torrefied pellets than it is to manufacture standard whitewood pellets. Kind Regards RW Michael:

In answer to your questions:

1) Typically – 10% of the original energy contained in the biomass is driven off in the torgas. This roughly equates to 1.6 Gj (Dry basis) depending on the feedstock.

2)Mass Density of the torrefied pellets is in the range of 800 to 1000KG/m3. mass density of torrefied wood is in the realm of 200 to 250 kg/m3.

3)Volatile content varies with the ultimate calorific value of the torrefied product. At low levels (22 to 23 Gj/tonne) the volatile content is >70%. On High Calorific value (24 to 26 Gj/tonne – Borderline Pyrolysis) the volatile content is much lower.

4)Specific gravity of the torrefied pellets is 1.1 to 1.2 (depending on the CV and Pelletizing process)

5) Cost of torrefaction varies widely with equipment and process used; (capex); power cost; plant capacity, etc. In general however, it is more economical to manufacture torrefied pellets than it is to manufacture standard whitewood pellets.

Kind Regards

RW

]]> By: Michael O'Halloran http://newenergyandfuel.com/http:/newenergyandfuel/com/2008/11/19/torrefaction-%e2%80%93-a-new-process-in-biomass-and-biofuels/comment-page-1/#comment-33454 Michael O'Halloran Wed, 30 Sep 2009 13:32:24 +0000 http://newenergyandfuel.com/?p=1165#comment-33454 Good Afternoon, Would you kindly inform me. 1. Typically when 1.0 kg of dry wood is torrefied how much energy in Megajoules is driven off in the released volatiles? 2. What is the weight of the residual torrified fuel? 3. Typically what is the volatile content of the residual torrified fuel? 4. What is the Specific Gravity of dry torrified pellets? 5. Typically what is the cost of torrifying one metric tonne of dry biomass, given a large-scale operation. Thanking you in anticipation Michael O'Halloran Good Afternoon,

Would you kindly inform me.

1. Typically when 1.0 kg of dry wood is torrefied how much energy in Megajoules is driven off in the released volatiles?

2. What is the weight of the residual torrified fuel?

3. Typically what is the volatile content of the residual torrified fuel?

4. What is the Specific Gravity of dry torrified pellets?

5. Typically what is the cost of torrifying one metric tonne of dry biomass, given a large-scale operation.

Thanking you in anticipation

Michael O’Halloran

]]> By: industrial thermo supply | Digg hot tags http://newenergyandfuel.com/http:/newenergyandfuel/com/2008/11/19/torrefaction-%e2%80%93-a-new-process-in-biomass-and-biofuels/comment-page-1/#comment-14648 industrial thermo supply | Digg hot tags Sat, 27 Dec 2008 12:01:29 +0000 http://newenergyandfuel.com/?p=1165#comment-14648 [...] Vote Torrefaction – A New Process In Biomass and Biofuels [...] [...] Vote Torrefaction – A New Process In Biomass and Biofuels [...]

]]> By: biological treatment industrial waste water | Digg hot tags http://newenergyandfuel.com/http:/newenergyandfuel/com/2008/11/19/torrefaction-%e2%80%93-a-new-process-in-biomass-and-biofuels/comment-page-1/#comment-14647 biological treatment industrial waste water | Digg hot tags Sat, 27 Dec 2008 11:55:24 +0000 http://newenergyandfuel.com/?p=1165#comment-14647 [...] Vote Torrefaction – A New Process In Biomass and Biofuels [...] [...] Vote Torrefaction – A New Process In Biomass and Biofuels [...]

]]> By: water treatment process diagram | Digg hot tags http://newenergyandfuel.com/http:/newenergyandfuel/com/2008/11/19/torrefaction-%e2%80%93-a-new-process-in-biomass-and-biofuels/comment-page-1/#comment-14582 water treatment process diagram | Digg hot tags Fri, 26 Dec 2008 14:16:12 +0000 http://newenergyandfuel.com/?p=1165#comment-14582 [...] Vote Torrefaction – A New Process In Biomass and Biofuels [...] [...] Vote Torrefaction – A New Process In Biomass and Biofuels [...]

]]>