proppresapr2003 (1)
TRANSCRIPT
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Utilization of Landfill Gas
towards High-BTU Methane andLow-Cost Hydrogen Fuel
by
Manolis M. Tomadais
and Howell H. He!
Florida "nstitute of Te!hnology
Melbourne# FL $%&'(
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Outline
)ationale
*b+e!ti,es
Methodology
reliminary )esults
nti!i/ated Benefits
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Rationale
H%0 is among the !om/onents of landfill
gas# whi!h !ontains /rimarily C*% and CH1
hotolyti! de!om/osition of H%0 /ro,ides
an alternati,e sour!e of hydrogen fuel
)emo,al of H%0 from landfill gas would
hel/ /re,ent odors# hazards and !orrosion )emo,al of C*% would in!rease the BTU
,alue of the remaining methane gas
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Objectives
1. Test the effi!ien!y of mole!ular sie,es 1# 2# ($3
in se/arating
landfill gas towards high-BTU methane and F04C-5uality H%0 672'8 H%0 and 9(8 C*%: by ressure
0wing dsor/tion 60:
2. "n,estigate the effe!t of the landfill gas H%0 !ontent
on the 0 /ro!ess effi!ien!y# by ,arying the H%0
feed ,olume fra!tion in the range '-( 8
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Objectives (cont’d)
3. ;etermine the effe!t of /ressure on CH1 and H%0
/rodu!t re!o,ery and /urity# by ,arying the
system high /ressure in the range 1'-('' /sig.
4. 4
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Pressure Swing Adsortion S!ste" #a!out
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Pressure Swing Adsortion Aaratus
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4
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4
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reliminary Testing
1. Mole!ular 0ie,es ($3 and 1 were /a!ed inColumns " and ""# res/e!ti,ely
2. mi
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Preli"inar! $%eri"ents
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Ratio o& Outlet to 'nlet olar low
during Adsortion
'.1
'.2
'.A
'.
'.
'.&
(
' (' %' $' 1' 2' A' '
time# min
G o u t ? G i n # d i m e n s i o n l e s s
Bed "
Bed ""
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Ratio o& 'nlet to Outlet olar low
during *esortion
'.1
'.2
'.A
'.
'.
'.&
(.'
' % 1 A (' (% (1 (A ( %' %% %1 %A
time# min
G i n ? G o u t # d i m e n s i o n l e s s
Bed "
Bed ""
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+as Product ,o"osition in -ed '
during Adsortion
'
('
%'
$'
1'
2'
A'
B'
C'
&'
(''
' (' %' $' 1' 2' A'
time# min
D o l u m e 8
CH1
C*%
H%0
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+as Product ,o"osition in -ed '
during *esortion
'
2
('
(2
%'
%2
$'
$2
1'
12
' 2 (' (2 %' %2
time# min
D o l u m e 8
H%0
C*%
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+as Product ,o"osition in -ed ''
during Adsortion
'
('
%'
$'
1'
2'
A'
B'
C'
&'
(''
' (' %' $' 1' 2' A' B'
time# min
D o l u m e 8
C*%
H%0
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+as Product ,o"osition in -ed ''
during *esortion
'
('
%'
$'
1'
2'
A'
' % 1 A C (' (% (1
time# min
D o l u m e 8
C*%
H%0
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2S/,O2 olar Ratio in -ed ''
*esortion Product
'
(
%
$
1
2
A
' % 1 A C (' (% (1
time# min
H % 0 ? C * % # d i m e n s i o n l e s s
Current rodu!t
!!umulated rodu!t
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Sieve ,aacit! 0 tiliation
1. Column " adsor/tion loadsE
'.& g CH1# %.1 g C*%# @ % g H%0?('' g ($3
Column " sie,e e5uilibrium !a/a!itiesE
%$ g C*% or (& g H%0 /er ('' g ($3
2. Column "" adsor/tion loadsE
%. g C*% and (.& g H%0 /er ('' g 1
Column "" sie,e e5uilibrium !a/a!itiesE
( g C*% or (1 g H%0 /er ('' g 1
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Su""ar! o& Preli"inar! Results
1. 2'8 CH1 feed o,er ($3 M0 resulted to
&8-&&8 /rodu!t CH1 during adsor/tion
2. A8 C*% - $% 8 H%0 feed o,er 1 M0
resulted to (8 H%0 and %&8 C*% /rodu!t
during desor/tion
3. %'-$'8 utilization of e5uilibrium sie,e!a/a!ity was en!ountered
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4
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nti!i/ated Benefits
;e,elo/ment of en,ironmentally a!!e/table
@ finan!ially sound end use for landfill gas#
/ro,iding both a high-BTU CH1 stream anda low-!ost H%0 feed stream su//ly for the
F04C renewable hydrogen fuel /rogram