UCG Presentation Corrected

8/13/2019 UCG Presentation Corrected

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Presentation on

Integration of Underground Coal Gasification

with CO2Enhanced Oil Recovery

By

Sonit Balyan(2!"#""2$

%e&art'ent of Che'ical Engineering

Indian Institute of echnology) Guwahati


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Outline of the &resentation

Introduction

Motivation

Objective

Experimental Setup

Results

Summary

Future Scope

February 18, 2014 2


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Introduction

*hat is gasification+

Gasification is an incomplete combustion of feed stock.

Pri'ary goal of gasification,

onversion of non!as" fraction to #as.

$roduct #ases "ave "eat of combustion value e%ual or more t"an t"e feed

stock.

*hat is Co'-ustion+

omplete combustion of feed stock.

&o "eatin# value of product #as.

February 18, 2014 3


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Coal .nalysis

'one to c"aracteri(ed coal into different #rades.

y&es of Coal .nalysis/

Pro0i'ate .nalysis/ Fixed carbon) volatile matter) moisture and as"

percenta#e.

Ulti'ate .nalysis/ oal component elements suc" as carbon) "ydro#en)

nitro#en) sulfur) and oxy#en etc.

*elps in kno+in# t"e "eatin# value of oal.

Optimi(es plant operation.

February 18, 2014 4


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y&es of Coal

,nt"racite-. /0!102) 3.M4!502) M.6!572) ,. 8!/2 by +ei#"t9

:ituminous-. ;7!/72) 3.M50!872) M.4!502) ,. 8!502 by +ei#"t9

&on!bituminous-. 67!802) 3.M4/!802) M.50!672) ,. 47!672 by +ei#"t9


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Underground Coal Gasification

>nder#round coal #asification converts coal to #as +"ile still in t"e coal seam-in!situ9.

$rimary $roducts ? *4) O ) O

4) *

8.

February 18, 2014 6

:asic >nder#round oal Gasification -@"adse et al.9


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Coal Gasification Reactions

Co'-ustion(O0idation$ Stage Reaction/

A O4 !!!!!!!B O4 A *eat-omplete9

A 5C4O4 !!!!!!!B O A *eat-$artial9

O A 5C4O4 !!!!!!!B O4 A *eat

Reduction Stage Reaction/

A *4O A *eat !!!!!!!B O A *4 -Dater #as9

A O4 A *eat !!!!!!!B 4O

February 18, 2014 7


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Selection Criteria for UCG site

'ept" of 5775877 metres.

="ickness more t"an 0 metres.

,s" content ran#e) -402 to 8029.

Minimal discontinuities.

Isolation from valued a%uifers.


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Enhanced Oil Recovery

It is recovery of oil by injection of fluids t"at are not normally present in

reservoir.

Increases recovery up to ;0!7 2 of initial oil in place-IOI$9.

Generally termed as tertiary recovery.

*hy we need EOR +

=ypes of Recovery?

$rimary Recovery? Recovery up to 572 of IOI$.

Secondary Recovery ? Recovery up to 40!67 2 of IOI$.

=ertiary Recovery ? Recovery up to ;0!72 of IOI$.

February 18, 2014 9


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y&es of EOR

hree 'a1or ty&es of EOR o&erations are/

"emical Floodin#)

Miscible displacement) and

="ermal recovery.

February 18, 2014 10

Dorlds EOR $roduction S"are-,dasani.et al.9


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CO2looding

It is effective when/

Reservoir dept" is #reater t"an 4)777 ft.

,$I #ravity of oil #reater t"an 44!40.

Remainin# oil saturation #reater t"an 472.

$ay t"ickness bet+een 57!40 m.


Sc"ematic dia#ram of O4 floodin# -Oil and #as journal) 47749


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3otivation

Oil reservoirs acco'&anying coal -loc4,

It is economical and no separate transportation facility is re%uired for O4

transfer.

CO2

se5uestration,Stora#e of O4 in reservoir reduces #reen"ouse #ases.

Energy Re5uire'ent,

Increase in demand of petroleum products and proper utili(ation of coal.



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O-1ectives

="e specific objective of project are as follo+s?

Experimental investi#ation of >G in a laboratory scale setup.

Effect of different coal sample on >G performance.

Effect of different feed #as composition) temperature and pressure on>G performance.

Estimation of maximum rate of *4and O

4production in >G at

optimi(ed condition.



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E0&eri'ental Setu&


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E0&eri'ental Procedures


Coal .nalysis,

%rilling,

Cutting,

Coating,

Connection,


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Coal .nalysis,

$roximate ,nalysis.

H Moisture ontent.H 3olatile ontent.

H ,s" ontent.

H Fixed arbon.

>ltimate ,nalysis.

Cont,6


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Cont,6

%rilling. Cutting,



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Cont,6

UCG O&eration Stages,

H I#nition Sta#e.

H ombustion Sta#e.

H Gasification Sta#e.



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Results

E0&eri'ent 7u'-er (C838$

H oal ,nalysis

H Gas flo+ rate and =ime duration of eac" sta#e


Ultimate Analysis Proximate Analysis (%)

Elements %

C F1.506 9olatile 3atter 46.F1

7 5.0;/ 2i0ed Car-on ;F.155

: 0.4F1 3oisture Content 0.1F

S 6.86/ .sh Content 4.641

O 57.0;4

UCG operation Stage Time duration Gas Flow rates (ml/min)

Oxy#en Steam

Ignition Stage 5.0 "rs 547 7

5.7 "rs ;7 7

Co'-ustion Stage 4.80 "rs 577 7

5.F0 "rs 587 7

Gasification Stage


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Cont,6

H Gas omposition H =emperature $rofile



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Cont,6

E0&eri'ent 7u'-er 2 (C8G8$

H oal ,nalysis

'ue to "i#" as" content it +as impossible to i#nite coal because as"

layer breaks t"e contact of coal and oxy#en. So) experiment 4 +as

stopped after 4 "rs of i#nition p"ase.



Elements %

C 06.08 9olatile 3atter /.605

7 2i0ed Car-on 4/.4451

: 5.45; 3oisture Content 0.1175

S .sh Content 0F.86F

O 80.488


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Cont,6

E0&eri'ent 7u'-er ; (C8382$

H oal ,nalysis

H Gas flo+ rate and =ime duration of eac" sta#e



Elements %

C F1.506 9olatile 3atter 40.F/

7 5.0;/ 2i0ed Car-on ;0.04

: 0.4F1 3oisture Content ;.46

S 6.86/ .sh Content 4.8F

O 57.0;4

UCG operation

Stage Time duration Gas Flow rates (ml/min)

Oxy#en Steamgnition Stage 5 "rs 487 7

Co'-ustion Stage 5.0 "rs 587 7

Gasi!i"ation Stage 4.0 "rs 7 4F.F


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Cont,6

H Gas omposition H =emperature $rofile



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Su''ary

="e current aspects +ere studied?

Operatin# onditions.

$"ysical "aracteristics of coal.

$reliminary experiments of t"e overall process -initiation) combustion and

#asification9 +ere performed.



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uture Sco&e

="e detail study of t"e mat"ematical formulation and #overnin# e%uation

for developin# >G model) conservation e%uations in coal seam andvalidate experimental results.

Fabrication of O4core floodin#.


2

8 ca&

28 SS tu-e

;8 ? e0&ander

!8 SS fitting

@8 ? e0&ander

A8 SS fitting

#8 ee 1oint ( 0 0 ;$

=8 ? > e0&ander

B8 > SS fitting

"8 valve

Core looding Setu& Sche'atic

;

!

@

A

#

A

=

B

=

A A

@

!

"


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References '. ,. :ell) :.F. =o+ler and M.Fan oal #asification and its applications)

Elsevier publication) 4755.

J. G. Spei#"t *andbook of oal ,nalysis) $roximate ,nalysis) >ltimate

,nalysis) Diley $ublication) 4770) p# 84.

,. @"adse) M. Kayyumi) S. Ma"ajani) $. ,#"alayam) >nder#round coal

#asification? , ne+ clean coal utili(ation tec"ni%ue for India) Ener#y

64-4779 47;5!475.

:. G.Miller) oal Ener#y System) Elsevier publication) 4770.

,. ,.


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:.7 DOU


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UCG Presentation Corrected