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.com
Volume 7, Issue 2 (Suppl)
J Adv Chem Eng, an open access journal
ISSN: 2090-4568
Euro Chemical Engineering 2017
November 16-17, 2017
ADVANCES IN CHEMICAL ENGINEERING AND TECHNOLOGY
November 16-17, 2017 | Paris, France
2
nd
International Conference on
Modeling and simulation of coal gasification in internally circulating fluidized bed
P S T Sai
and
Vivek Nigam
Indian Institute of Technology Madras, India
C
oal gasification is one of the best ways to convert the char into the synthesis gas. This process has proved to be very effective
in Internally Circulating Fluidized Bed (ICFB) gasifier. In ICFB, there occurs gas bypassing from draught to annulus
region and vice versa. In the present work, the effects of gas bypassing through the orifices on product gas compositions in
both annulus and draught tube is studied following the modeling reported in literature.The same modeling is applied to a
coal of inferior quality and the conversion and product gas compositions at different temperatures and the effects of various
parameters are studied. The number of circulations a particle should undergo, total gas yield and solid circulation rate inside
the reactor is studied at different temperatures for different conversion levels. In addition, the effects of coal feed rate, particle
size, and O
2
to coal and H
2
O to coal mass ratio is studied on number of circulations, total gas yield and solid circulation rate.
The optimum operating conditions are also obtained to achieve a specified conversion with minimum number of circulations
and maximum gas yield per kg of coal per pass through sequential optimization. For a mixture of particle of different sizes, the
conversion and product gas composition in annulus region are studied and compared with uniform size particles. The product
gas composition depends strongly on operating parameters such as O
2
/coal and H
2
O/coal mass ratio and gas bypassing values
through the orifice.
Figure 1
:
Composition of product gas in annulus region at different temperatures
Biography
P. S. T. Sai is a professor in Chemical Engineering at Indian Institute of Technology Madras. He has been actively involved in teaching and research for the past
32 years. His research interests include fluidization, reaction engineering and air pollution control. He has published over 80 research papers. His paper entitled
“Esterification of ethanol with sulfuric acid: A kinetic study” was awarded as the best paper published in The Canadian Journal of Chemical Engineering in 2001.
He also received Chemical Weekly Award, IIChE NRC Award and. Kuloor Memorial Award in 2012. He has handled many industrial projects and one of them is
development of an equipment for simultaneous removal of particulates and SO
2
from effluent gaseous streams.
psts@iitm.ac.inP S T Sai et al., J Adv Chem Eng 2017, 7:2(Suppl)
DOI: 10.4172/2090-4568-C1-002