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i n t e rn a t i o n a l j o u r n a l o f h y d r o g e n en e r g y 4 0 ( 2 0 1 5 ) 1 0 4 1 8e1 0 4 2 6
Available online at w
ScienceDirect
journal homepage: www.elsevier .com/locate/he
Experimental and modeling study of hydrogenproduction from catalytic steam reforming ofmethane mixture with hydrogen sulfide
Parham Sadooghi a,*, Reinhard Rauch b
a Vienna University of Technology, Vienna, Austriab Bioenergy 2020þ GmbH, Gussing, Austria
i n t e r n a t i o n a l j o u r n a l o f h y d r o g e n en e r g y 4 0 ( 2 0 1 5 ) 1 0 4 1 8e1 0 4 2 6 10425
Acknowledgments
The authors wish to acknowledge the financial support of the
Austrian Climate and Energy Fund since this workwas carried
out under the Projects ‘‘distributed SNG’’ and ‘‘BioH2-4in-
dustries’’. Moreover the authors acknowledge the financial
support of the Austrian COMET program, where within the
Bioenergy2020þ projects ‘‘BioH2’’ and “Mixed Alcohols” a part
of the work was carried out.
Nomenclature
an External pellet surface area per unit reactor volume
m2p=m
3r
Ci Concentration of reactant ikmol/m3
Cp Specific heat capacity J/(Kg*K)
Cs Solid concentration kmol/m3
di Inner diameter m
do Outer diameter m
dp Equivalent particle diameter m
DEN Denominator in the expressions of reaction rates
Der Effective radial diffusion coefficient m2/s
f Friction factor
hf Heat transfer coefficient at catalyst surface W/(m2K)
kg Mass transfer coefficient from gas to solid interface
m3f =ðm2
i ÞKj Adsorption constant of component j
k1 Rate coefficient of reaction 1 kmol bar�0.5(kg cat s)
k2 Rate coefficient of reaction 2 kmol/(kg cat bar s)
k3 Rate coefficient of reaction 3 kmol bar�0.5(kg cat s)
Ki Equilibrium constant of reaction i
K1 Equilibrium constant of reaction 1 bar2
K2 Equilibrium constant of reaction 2
K3 Equilibrium constant of reaction 3 bar2
n Molar flow rate kmol/s
p Pressure bar
Pi Partial pressure of component i bar
R Radius of the reactor m
Rg Gas constant kJ/(kmol K)
Rep Particle Reynolds number
Ri Reaction rate of component i mol/(kg cat s)
RS0i Free sulfur reaction rate mol/(kg cat s)
RSi Reaction rate with sulfur mol/(kg cat s)
Rj Reaction rate of component j mol/(kg cat s)
R1 Reaction rate of reaction 1 mol/(kg cat s)
R2 Reaction rate of reaction 2 mol/(kg cat s)
R3 Reaction rate of reaction 1 mol/(kg cat s)
R4 Reaction rate of reaction 4 mol/(kg cat s)
T Temperature K
Tw Wall temperature K
ur Gas velocity in radial direction m/s
uz Gas velocity in axial direction m/s
V Volume m3
Greek letters
DН0 Enthalpy of formation kJ/mol
ε Porosity of packed bed reactor
hi Effectiveness factor of reaction i
ler Effective thermal conductivity W/(mK)
m Viscosity of the mixture Pa s
rf Fluid density kg/m3
rc Catalyst density kg/m3
qs Sulfur surface coverage
Subscripts
0 Initial condition
c Catalyst
er Effective
f Fluid
g Gas
p Particle
r Radial direction
S Solid
w Reactor wall
z Axial direction
Superscripts
0 Standard condition
s Condition at the catalyst surface
r e f e r e n c e s
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