Featured Research

from universities, journals, and other organizations

Biofuels: Process Used To Roast Coffee Beans May Give Biomass A Power Boost

Date:
May 21, 2008
Source:
University of Leeds
Summary:
A process used to roast coffee beans could give Britain's biomass a power boost, increasing the energy content of some leading energy crops by up to 20 per cent.

A process used to roast coffee beans could give Britain's biomass a power boost, increasing the energy content of some of the UK’s leading energy crops by up to 20 per cent.

The study, carried out by engineers from the University of Leeds, examined the combustion behaviour of crops grown specifically for energy creation when put through a mild thermal process called ‘torrefaction’ – more usually associated with coffee production.

Torrefaction is increasingly seen as a desirable treatment for biomass because it creates a solid product which is easier to store, transport and mill than raw biomass.

The study examined the energy crops willow, canary grass and agricultural residue wheat straw to see what happened when they went through the torrefaction process and how they behaved at a range of temperatures when they were heated to create an energy-enhanced fuel.

Results showed that the treated materials needed less time and energy to heat to burning point, and also that they offered increased energy yields upon burning.

Willow emerged as having the most favourable properties, in that it retained more of its mass in the torrefaction process and also performed best in terms of its energy yield. As an example, willow was shown to have an 86 per cent energy yield, compared with 77 per cent for wheat straw and 78 per cent for reed canary grass.

“Raw biomass takes up a lot of space and has a low energy density which makes it costly – environmentally and economically – to transport. Plus you need more of it than say, coal, to produce energy efficiently,” says Professor Jenny Jones who worked on this study with PhD student Toby Bridgeman.

“Torrefaction is not currently used in the UK in either the agricultural or the energy sectors,” says Bridgeman. “But our paper shows that it has a lot of benefits, besides those to do with fuel handling, so we feel it’s definitely something we’d like to explore further.”

This research was supported by the Supergen Bioenergy Consortium, an initiative created by the Engineering and Physical Sciences Research Council as part of its commitment to funding research which will help the UK reach EU targets for the reduction of CO2 emissions and increased use of renewable energy.


Story Source:

The above story is based on materials provided by University of Leeds. Note: Materials may be edited for content and length.


Journal Reference:

  1. T.G. Bridgemana, J.M. Jonesa, I. Shieldb and P.T. Williams. Torrefaction of reed canary grass, wheat straw and willow to enhance solid fuel qualities and combustion properties. Fuel. Volume 87, Issue 6, May 2008, Pages 844-856. doi:10.1016/j.fuel.2007.05.041

Cite This Page:

University of Leeds. "Biofuels: Process Used To Roast Coffee Beans May Give Biomass A Power Boost." ScienceDaily. ScienceDaily, 21 May 2008. <www.sciencedaily.com/releases/2008/05/080521102826.htm>.
University of Leeds. (2008, May 21). Biofuels: Process Used To Roast Coffee Beans May Give Biomass A Power Boost. ScienceDaily. Retrieved August 21, 2014 from www.sciencedaily.com/releases/2008/05/080521102826.htm
University of Leeds. "Biofuels: Process Used To Roast Coffee Beans May Give Biomass A Power Boost." ScienceDaily. www.sciencedaily.com/releases/2008/05/080521102826.htm (accessed August 21, 2014).

Share This




More Earth & Climate News

Thursday, August 21, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Unsustainable Elephant Poaching Killed 100K In 3 Years

Unsustainable Elephant Poaching Killed 100K In 3 Years

Newsy (Aug. 20, 2014) — Poachers have killed 100,000 elephants between 2010 and 2012, as the booming ivory trade takes its toll on the animals in Africa. Video provided by Newsy
Powered by NewsLook.com
Charter Schools Alter Post-Katrina Landscape

Charter Schools Alter Post-Katrina Landscape

AP (Aug. 20, 2014) — Nine years after Hurricane Katrina, charter schools are the new reality of public education in New Orleans. The state of Louisiana took over most of the city's public schools after the killer storm in 2005. (Aug. 20) Video provided by AP
Powered by NewsLook.com
Green Power Blooms as Japan Unveils 'hydrangea Solar Cell'

Green Power Blooms as Japan Unveils 'hydrangea Solar Cell'

AFP (Aug. 19, 2014) — A solar cell that resembles a flower is offering a new take on green energy in Japan, where one scientist is searching for renewables that look good. Duration: 01:29 Video provided by AFP
Powered by NewsLook.com
Disquieting Times for Malaysia's 'fish Listeners'

Disquieting Times for Malaysia's 'fish Listeners'

AFP (Aug. 19, 2014) — Malaysia's last "fish listeners" -- practitioners of a dying local art of listening underwater to locate their quarry -- try to keep the ancient technique alive in the face of industrial trawling and the depletion of stocks. Duration: 02:29 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins