Chemical Engineering June 2010 - 6

Letters
New gasification process?
April, A new gasification process moves a step closer to
commercialization, p. 11: It would seem IHI is a little
behind the times with this process - say about 20 years.
Battelle developed and proved this process in the 1980s.
Furthermore, DOE and others funded and proved out the
process over 15 years ago. In 2004, DOE selected a team
to build a 285 MW version of this plant. It was cancelled a
couple of years later as being too costly. One wonders too
costly compared to what? Cap and Trade!
Daniel L. Dunn, P.E.
Northridge, Calif..
While the idea of coal gasification is not new, the process
described in this article is certainly new for IHI,
since the company is in the process of demonstrating
the technology in Indonesia. - Ed.
CO2 and oceanic acidity?
I have a comment on CO2 as an atmospheric pollutant
[commenting on the March Editor's Page, " Opinions
on GHGs " ]. If one subscribes to the concept of
evolution and the beginning of life in a primordial
slime, then one has to recognize that CO2 is absolutely
necessary to life on earth. Something had to
supply the carbonaceous matter to the solution to
provide amino acids for the first living organisms.
Proceeding from there, carbon dioxide provides the
carbonaceous material for the growth of all plants
and animals. The wonderful reaction between carbon
dioxide and water in the presence of chlorophyll and
sunlight provides food for all living organisms.
I question whether the small increase in carbon dioxide
concentration in the atmosphere will have a great effect
on the acidity of our oceans. The ionization constant for
the acid H2CO3 is 4.4 3 10-7, yielding a pH of 6.43. I know
carbon dioxide in water can and will dissolve calcium carbonate.
I have seen such a solution bubble from the ground
at Mammoth Hot Spring in Yellow Stone Park. The water
flows over the calcium carbonate deposit until it cools; as
the CO2 is lost, calcium carbonate crystals deposit. I am
sure this process begins at higher temperatures and pressures
far beneath the earth's surface. It seems to me that
there are numerous other acids available to be dissolved in
the oceans that will yield a more acidic solution.
I enjoyed your editorial, and I read your magazine
monthly.
Edward C. Murray
Valley Forge, Pa
Postscripts, corrections
Chemical Engineering Plant Cost Index (Online database
subscription only; www.che.com/pci): In any downloads
prior to the week of June 1, 2010, the January 1993 numbers
may have contained errors. The problem has been
fixed. Our thanks to reader Kristine V. Beese for bringing
this to our attention. ■
Circle 18 on p. 62 or go to adlinks.che.com/29251-18

http://adlinks.che.com/29251-18 http://www.che.com/pci

Chemical Engineering June 2010

Table of Contents for the Digital Edition of Chemical Engineering June 2010

Contents
Chemical Engineering June 2010 - Cover1
Chemical Engineering June 2010 - Cover2
Chemical Engineering June 2010 - Contents
Chemical Engineering June 2010 - 2
Chemical Engineering June 2010 - 3
Chemical Engineering June 2010 - 4
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Chemical Engineering June 2010 - Cover3
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