Skip navigation

Dirty coal is still a popular choice for power generation around the world, irrespective of the status of the country, whether industrially advanced or backward. The abundant availability and cheap cost, makes coal more attractive from investor’s point of view; they care less for the environment, while Governments turn a blind eye to all the emissions and pollutions. It is a question of survival for millions of people who work in coal mines and industries. It is one of the toughest challenges many Government are facing. Take for example India; about 65% of power generation still comes from coal. The import of coal increases year after year and there is no immediate solution in sight. Indian coal is a low-grade coal with very high ash content. Each coal-fired power plant generates a huge amount of fly ash and they stockpile them; supposed to be used in the production of Portland cement. It is a big business.

China and Indonesia too uses coal as a major fuel for power generation. But they have come out with an innovative and pragmatic method of using coal. They use coal-water-slurry (CWS), a finely pulverized high  grade coal (calorific value 5100-6100Kcal/kg) in water. They use some chemical additives that make the slurry a homogeneous fluid, similar to a Hydrocarbon such as Heavy fuel oil (HFO).The advantage with CWS is it can be easily pumped and injected into a furnace or boiler using ceramic nozzles, obviously to avoid erosion due the abrasive nature of coal, just like firing diesel or heavy oil. According to the literature, 1.8 -2.2 tons of CWS is equal to 1 ton of Heavy fuel oil (HFO) and it costs about the same. It cost only US$ 62 million to retrofit an existing coal-fired power plant with CWS system and the yearly savings are estimated at US$ 41 mil per year, an attractive rerun on investment.

The beautiful aspect of this method is it generates Hydrogen rich Syngas according to the following chemical reaction.

2C + O2+2 H2O ——– 2H2+2 CO2 when the mixture is subject to Gasification instead of mere Combustion.

The combustion efficiency is about 96-99% and the boiler efficiency of more than 90%. It generates less Sulfur dioxide and Nitrogen oxide emissions and good for the environment compared to conventional coal-fired power plants. It is a good technology that needs the attention of Governments especially India, China and Indonesisa.Even coal rich countries like US, Australia should focus on this technology apart from their persuasion such as carbon sequestration.

In fact this will open new avenues for India and China to switch over to Hydrogen economy without making large investments. The coal water slurry fluid has a property similar to a Hydrocarbon as shown below.

Density 65-70% ,Viscosity -1000Cp, Size d< 50 microns, Ash content <7, Sulfur<0.5%. It is easy to handle a liquid than solid coal. pulverized coal is pneumatically conveyed and fired in rotary cement kilns for so many years. There is nothing new about it. Similarly coal water slurry can be a game changer for  the power industry,  if it is combined with Gasification and combined cycle;  it will lead  into Hydrogen based power generation industry using Fuel cell such as Molten Carbonate Fuel cell (MCFC). I believe there is a clear opportunity for the Governments and private industries  to seriously look into CWS technology which I believe, is a ‘precursor’ for Hydrogen economy of the future.

Advertisements

8 Comments

  1. me find
    I would like to express some appreciation to the writer for bailing me out of this type of setting. Because of looking out throughout the online world and getting concepts that were not beneficial, I assumed my entire life was done. Existing without the answers to from here the problems you’ve resolved by way of this article is a serious case, as well as the kind that could have negatively damaged my career if I hadn’t encountered your web page. Your own know-how and kindness in maneuvering the whole thing was invaluable. I am not sure what I would’ve done if I hadn’t encountered such a step like this. I can also now relish my future. Thanks for your time very much for this impressive and effective help. I will not hesitate to suggest your blog post to anyone who will need care about this area.

  2. Keep up your wonderful function , I read number of content on this website and I have a baby that your weblog is really intriguing, notable and has lots of good info.

  3. I needed to send you one very little note to be able to say thanks yet again with the extraordinary pointers you’ve featured on this site. This has been devojke za upoznavanje upoznavanje preko interneta simply surprisingly open-handed of people like you in giving freely what exactly a few people might have sold as an electronic book to generate some cash for themselves, notably given that you might well have done it in case you decided. Those thoughts additionally worked to become a easy way to fully grasp other individuals have a similar eagerness like my personal own to figure out somewhat more when it comes to this matter. I am certain there are many more pleasurable times ahead for individuals that look over your blog. devojke za upoznavanje upoznavanje preko interneta

  4. everything here is absolutely awesome, posts, style, all!http://www.jogosdofutebol.net

  5. Wow, incredible blog layout! How long have you been blogging for? you made blogging look easy. The overall look of your website is magnificent, as well as the content!

  6. This writing has inspired me to start focusing on my own blog

  7. Thanks for your comments.


4 Trackbacks/Pingbacks

  1. […] Carolina leads region in hydrogen economyHydrogen Fuel Cars and Vehicles BlogNeuroLogica BlogCoal-water-slurry – a new source of Hydrogen .recentcomments a{display:inline !important;padding:0 !important;margin:0 […]

  2. […] Coal-water-slurry – a new source of Hydrogen? (ahilan007.wordpress.com) […]

  3. By Toplinksz2 on 10 May 2012 at 7:11 pm

    Rhymiaz2…

    Wonderful blog post, saw on…

  4. By Team Work on 13 May 2012 at 8:01 am

    Visitor recommendations…

    […]one of our visitors recently recommended the following website[…]……

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: