* take nothing for granted    
Unless otherwise indicated all photos © Richard McKie 2005 - 2020

Who is Online

We have 58 guests and no members online

Article Index

(Carbon Sequestration)

 

 

 

Carbon sequestration 2009 10 07
Carbon Sequestration Source: Wikimedia Commons

 

At the present state of technological development in NSW we have few (perhaps no) alternatives to burning coal.  But there is a fundamental issue with the proposed underground sequestration of carbon dioxide (CO2) as a means of reducing the impact of coal burning on the atmosphere. This is the same issue that plagues the whole current energy debate.  It is the issue of scale. 

Disposal of liquid CO2: underground; below the seabed; in depleted oil or gas reservoirs; or in deep saline aquifers is technically possible and is already practiced in some oil fields to improve oil extraction.  But the scale required for meaningful sequestration of coal sourced carbon dioxide is an enormous engineering and environmental challenge of quite a different magnitude. 

It is one thing to land a man on the Moon; it is another to relocate the Great Pyramid (of Cheops) there.

The underground volume required to dispose of coal sourced carbon dioxide is over five times that occupied by the coal that produced it. As discussed in more detail below, to liquify and sequester just 25% of NSW coal sourced CO2 annually (for example that produced by coal fired electricity) would fill a volume of 63 thousand million cubic metres (=251 Km square by 1m deep).  As it is expected that this liquid would be pumped into porous strata, where it will fill interstitial voids to perhaps 10% of the volume, several thousand thousand square kilometers of strata would be required annually. These volumes would also require hundreds of kilometres of high pressure distribution pipeline and hundreds of injection bore holes the diameter and depth of oil wells. 

Within a few years, the underground sequestration site (or sites) required for CO2 would underlie hundreds of thousands of square kilometres of NSW countryside with high pressure liquid/solid phase CO2 that would pose probably insurmountable: geological; engineering; environmental; aesthetic; safety; and cost issues.

Power generation metals smelting and the mining that supports them are amongst civilisation’s largest enterprises.  Present installed coal thermal generating plant capacity in NSW is 12.6 GW.  This is the largest electricity generation capacity of any Australian State (32.4% of the total) and bigger than many developed countries including Switzerland, New Zealand and Denmark. But this capacity is dwarfed in world terms. China adds this capacity every few months.  A single project, their three gorges dam, will have double our entire capacity. We are small players on the world stage and what we do makes little material difference.

NSW is heavily dependent on coal. In 2005-6 the New South Wales (NSW) coal mining industry produced around 161.3 million tonnes (Mt) of raw coal, yielding 124.7 Mt of saleable coal in 2005-06. This accounted for $8.5 billion in income, or 73% of the total value of the NSW mining sector. Exports of 89.8 Mt of thermal and metallurgical coal totalled approximately $6.7 billion in value, while domestic consumption of 33 Mt of coal by the power, steel and other industries totalled $1.8 billion in value. The remaining saleable coal was placed into mining stocks.[1] Since that time exports have increased and the coal price has more than doubled.  Coal is presently worth at least $15 billion a year to the NSW economy, disregarding its economic multipliers.

 

 


    Have you read this???     -  this content changes with each opening of a menu item


Travel

Morocco

 

 

In August 2008 we visited Morocco; before going to Spain and Portugal.  We flew into Marrakesh from Malta and then used the train via Casablanca to Fez; before train-travelling further north to Tangiers.

Read more ...

Fiction, Recollections & News

Electricity Shocks

 

 

 

I've always thought that would be a good headline. 

Now that I have your attention I have to report that Emily McKie, my daughter, is the author of a new e-book on Smart Grid technology in her sustainable cities series.

 

 

 

Read more ...

Opinions and Philosophy

The Origin of Life - according to God

 

 

 

Back in April 2013 I had another visit from our neighbourhood Jehovah's Witnesses,  a pretty young woman and her husband, recently married.   Like Daniel (mentioned elsewhere on this website) before them, they had brought copies of The Watchtower and Awake; which I agreed to read if they were prepared to read my paper: The Prospect of Eternal Life.

I keep a couple of copies of The Prospect of Eternal Life for just such occasions and have also given a copy to the local Anglican minister and to various other active proselytisers in the area; with similar conditions.  Of course I know it will not change their position but I do like to have the debate and amazingly so do they; it beats the usual reception they get; and they get some practice in trying to convert un-believers. 

When the couple asked my position I quickly summarised that in The Prospect of Eternal Life

Read more ...

Terms of Use                                           Copyright