Numerical analysis of characteristics of biogas and syngas combustion

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Numerical analysis of characteristics of biogas and

syngas combustion

T. Boushaki, K Shway, H. Zaidaoui, P Gillon, B. Sarh

To cite this version:

T. Boushaki, K Shway, H. Zaidaoui, P Gillon, B. Sarh. Numerical analysis of characteristics of

biogas and syngas combustion. 9th European Combustion Meeting, Apr 2019, Lisboa, Portugal.

�hal-02113607�

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Numerical analysis of characteristics of biogas and syngas combustion

T. Boushaki*, K. Shway, H. Zaidaoui, P. Gillon, B. Sarh

ICARE – CNRS, Universty of Orleans, 1C av. de la Recherche Scientifique, 45071 Orléans, France

* toufik.boushaki@cnrs-orleans.fr

9th European Combustion Meeting, ECM2019, 14-17 April, Lisboa, Portugal

RenewValue Project

European project: ERANETMED2-72-169

RQ2: Energy and Environment

Collaborative Innovation Project - Mobility

Subject: Local sustainable renewable energy supply for vulnerable

communities in arid and semi-arid Mediterranean zones (MENA)

Partners

: ICARE CNRS (France), Universität Rostock, DBFZ (Germany), Ibn

Tofail University (Morocco), INSAT and ENIT (Tunisia), Politecnico di Torino (Italy)

Duration : 3 years (2018-2021)

ICARE tasks and objective of the study

Development of modular adapted energy concept

Gasifier - multi-fuel burner - boiler

Characterization of syngas and biogas flames

Experimentally: stability, pollutant emissions, temperature

Numerically: Calculations of laminar burning velocity, flame

temperature, pollutants (NOx, CO)…

This poster: some results of calculations

COSILAB: Combustion Simulation Laboratory

Numerical

simulation

tool

for

laminar

combustion problems 0D, 1D and recently

2D. Here, calculations of flame 1D (RUN 1DL)

Laminar flame velocities (S

_L

)

Flame temperatures (T

f

)

Chemical species distributions

Pollutant emissions (NO, CO…)

Pathways of chemical reactions

Combustion characteristics _ calculations

Reference case

CH

4

-air

Biogas flame

Syngas flame

For different parameters : T, P, Xi,

φ

With different mechanisms of reactions

Case of CH

₄

-air flame

10 15 20 25 30 35 40 0,7 0,75 0,8 0,85 0,9 0,95 1 1,05 1,1 1,15 1,2 1,25 1,3 L a m in a r b u rn in g v el o ci ty , SL (c m / s) Equivalence ratio GRIMECH 298K Skeletal 30 species San Diego NIU GALWAY Boushaki al. 2012 Coppens et al. 2007 Halter et al. 2005 Bosschaart and Goey 2004 Gu et al. 2000

Vagelopoulous and Egolfopoulos 1998 Y.L.Chan et al.2015

Zahedi et al. 2014 Law et al. 1993 Van Maaren et al. 1994

CH4-air à 298K, 1 bar 0 20 40 60 80 100 300 350 400 450 500 SL [c m /s ec ] Ti [K] Cosilab GRIMECH 3.0 E. Hu et al. 2012 Han et al. 2007 Mishra et al. 2003 Hill et al. 1988 Garforth et al. 1978 10 15 20 25 30 35 40 1 2 3 4 5 Sl [c m /s e c ] Pi[bar] CH4-air, 298K, =1 GRIMECH3.0 L. Puzetti et Al. 2017 O. Park et Al. 2011 Rozenchan et Al. 2002 GU et Al. 2000

Laminar burning velocity with equivalence

ratio: CH

₄

-air, at 298 K, 1 bar

Laminar burning velocity with initial

temperature and pressure : CH

₄

-air, 1 bar,

Φ

=1

Results are validated, with 4 mechanisms

of chemical reactions

S

_L

with T

_i

:

Heating of gas intake

induces a better combustion

S

L

with P

i

COSILAB

2D. Here, calculations of flame 1D (RUN 1DL)

Biogas flame calculations

Syngas flame calculations

0 5 10 15 20 25 30 35 40 0,7 0,9 1,1 1,3 SL [c m /s ec ]

80% CH4-20% CO2 / air, 1 bar, 298K

GRI MECH 3.0 San Diego mechanism H.O.B. Nonaka et al. 2016 Zahedi et al. 2014 10 15 20 25 30 35 40 0% 5% 10% 15% 20% 25% 30% 35% 40% 45% 50% S L ( cm /s )] CO2 S L=f(%CO2) à 298K, 1 bar

Flame velocity with equivalence ratio: CH

4

-CO2 (90/10 and 80/20%)

Flame velocity with CO

2

Results validated by experiments from the literature

Laminar burning velocity (S

L

) decreases with CO

2 addition

0 5 10 15 20 25 30 35 40 0,7 0,8 0,9 1 1,1 1,2 1,3 Sl [c m /s ec ] 90% CH4-10% CO2/ air, 1 bar, 298K GRI MECH 3.0 GRI SKELETAL MECHANISM San Diego mechanism H.O.B. Nonaka et al. 2016 Chan et al. 2015 Zahedi et al. 2014 0 10 20 30 40 50 60 70 80 90 100 0,5 1 1,5 2 2,5 3 3,5 4 4,5 5 Sl [c m /s ec ]

90% CO-10% H2 / air , 1 bar, 298 K

Cosilab 2018 (included mechanism)

CRECK Modeling Group, E. Ranzi et al. (Politecnico di Milano) S. Da vis et al. (University of Dela ware)

A. Keromnes et al. (NIU Galway) N. Bouvet et a l. 2011 M.I. Hassan et al. 1997

0 50 100 150 200 0,5 1,5 2,5 3,5 4,5 SL [c m /s ec ] 50% CO/ 50% H2

Cosila b 2018 (icluded mecha nism)

CRECK Modeling Group, E. Ra nzi et al. (Politecnico di Mila no) S. Davis et a l. (University of Dela wa re)

A. Keromnes et a l. (NIU Galway) Y. Zhang et a l. 2014 N. Bouvet et a l. 2011 C. Pratha p et a l.2008 M.P. Bruke et a l. 2009 H. Sun et a l. 2007 M.I. Ha ssa n et al. 1997 I.C. McLea n et a l. 1994

Laminar burning velocity of CO-H

₂

-air flames: 90/10% and 50/50 % CO-H

₂

Results are compared and validated with experimental results

With +H : S max at

Φ

=2.5 (CH -air: at

Φ

= 1.05)

1750 1800 1850 1900 1950 2000 T f [K ] CO2 T f=f(%CO2) à 298K, 1 bar

Temperature, NOx and CO emissions of CH

₄

-CO

₂

-air flames with CO

₂

0,5 1 1,5 2 2,5 3 0 10 20 30 40 50 M a ss f r a c ti o n ( × 1 0 -5 ) % CO2 NOx 2 2,5 3 3,5 0 10 20 30 40 50 M a ss f ra ct io n (× 1 0 -2) % CO2 CO emissions

Flame temperature decreases with CO

₂

addition

NOx

with CO

₂

CO

with CO

2 It is necessary to find a good balance to meet the standards

Acknowledgements:

This work is supported by the ANR (Agence

Nationale de la Recherche), the CNRS and the University of Orléans:

Eranet-Med II (RenewValue), LABEX CAPRYSSES (ANR-11-LABX-0006-01).

With +H

2 : S

L

max at

Φ

=2.5 (CH

4 -air: at

Φ

= 1.05)

+ H

2 S

L

; S

Lmax

: 190 at 50% of H

2 , 90 at 50%H

2 against 38 cm.s

-1

CH

4 -air

+ H

2 : higher reactivity, higher flammability limits, higher velocity, higher T

1800 1900 2000 2100 2200 98% CO 2% H2 90% CO 10% H2 80% CO 20% H2 70% CO 30% H2 60% CO 40%H2 50% CO 50%H2 Tco m b [K ] Syngas, 1 bar, 298 K, =1 20 30 40 50 60 70 80 90 100 110 120 98% CO 2% H2 90% CO 10% H2 80% CO 20% H2 70% CO 30% H2 60% CO 40%H2 50% CO 50%H2 Sl [c m /s ec ] Syngas, 1 bar, 298 K, =1