Chemical Engineering December 2013 - 27

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Figure 2. The Prenflo PDQ entrainedflow
gasifier includes water quench for
H2-rich gases
This flexibility of the gasification
process means that it can produce one
or more products from the same process.
Typically, according to the GTC,
70 to 85% of the carbon in the feedstock
is converted into the syngas.
Gasification innovations
Gasification is a viable, commercially
proven technology that has been
around since the beginning of the
last century, and hundreds of gasifiers
have been operated successfully
over the decades, says Claudio Marsico,
head of the sales department,
Gas Technologies Division of ThyssenKrupp
Uhde GmbH (Dortmund,
Germany; www.thyssenkrupp-uhde.
eu). " Although the investment cost
for gasification-based projects is relatively
high, it provides significant
benefits during operation, " he says.
" Modern gasification technologies
should use the entire range of solid
feedstocks, including high-ash and
low-rank coal, allow a mixture of different
feedstocks, avoid coal washing,
use coal fines, reduce higher
hydrocarbons in raw syngas, and
allow maximum capacity per single
gasifier to reduce investment costs
and operational costs as well.
" Moreover, " continues Marsico, " the
design of a modern gasification plant
should take into special consideration
the feedstock characteristics, the final
product specification, and the integration
into the entire facility. "
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Circle 2 on p. 68 or go to adlinks.che.com/45779-02

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Chemical Engineering December 2013

Table of Contents for the Digital Edition of Chemical Engineering December 2013