• Blog Stats

    • 75,244 hits
  • Archives

  • Enter your email address to subscribe to this blog and receive notifications of new posts by email.

    Join 157 other followers

  • Copyright notice

    This blog entry and all other text on this blog is copyrighted, you are free to read it, discuss it with friends, co-workers and anyone else who will pay attention.

    If you want to cite this blog article or quote from it in a not for profit website or blog then please feel free to do so as long as you provide a link back to this blog article.

    If as a school teacher or university teacher you wish to use content from my blog for the education of students then you may do so as long as the teaching materials produced from my blogged writings are not distributed for profit to others. Also at University level I ask that you provide a link to my blog to the students.

    If you want to quote from this blog in an academic paper published in an academic journal then please contact me before you submit your paper to enable us to discuss the matter.

    If you wish to reuse my text in a way where you will be making a profit (however small) please contact me before you do so, and we can discuss the licensing of the content.

    If you want to contact me then please do so by e-mailing me at Chalmers University of Technology, I am quite easy to find there as I am the only person with the surname “foreman” working at Chalmers. An alternative method of contacting me is to leave a comment on a blog article. If you do not know which one to comment on then just pick one at random, please include your email in the comment so I can contact you.

Calcium carbide and Tianjin

Dear Reader,

It has come to my attention that an almighty explosion has occurred in China. It has been reported that the site was used for the storage of calcium carbide and other chemicals. Some of you might want to know what calcium carbide is, it is a chemical formed in electric arc furnaces from graphite and limestone (calcium carbonate).

In contrast to aluminium carbide when it is reacted with water it forms acetylene rather than methane. If it was a simple carbide with carbon four minus ions (C4-) then it would be expected to form methane when it is treated with a source of protons. Instead it forms ethyne (acetylene) when it is treated with water.

This suggests that it contains C22- ions rather than simpler C4- ions, this formation of non-methane hydrocarbons from metal carbides is not unique. It has been reported that uranium monocarbide (UC) forms a host of different hydrocarbons when it is treated with water.

I hope to be able to write more about calcium carbide soon

 

 

Advertisements

Go on, Have your say !

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: