Simulation and Sensitivity Analysis for H2 Production Using Steam Oxygen Gasification in Aspen Plus

A. Latif, N. Ramzan

Abstract


In this study, steady state simulation model of steam oxygen gasification has been developed in Aspen Plus for hydrogen production using Pakistani Thar coal. Aspen Plus is selected as a simulation tool due to its higher capability of handling solid feed using physical models. Steam oxygen gasifier has been modeled in two steps; first utilizing DECOMP succeeding RGibbs unit operation model. Simulation results include; sensitivity analysis of coal slurry concentration , oxygen to coal mass ratio and gasifier operating temperature. Influence of the above mentioned parameters are analyzed on lower heating value of syngas, thermal efficiency, gasifier efficiency and molar fraction of hydrogen in enriched syngas.Simulation results provide the following optimal operating conditions; 50% solid concentration, 0.48 O2 to coal mass ratio, low shift reactor operating temperature 473 K, high shift reactor operating temperature 623 K and gasifier operating temperature 1173 K for the production of syngas having 92% H2 molar composition.

Full Text:

PDF

References


National Power Policy. Ministry of Water and Power. Government

of Pakistan. Available online: http://www.ppib.gov.pk/National%

Power%20Policy%202013.pdf, 2013.

J. Powers and J. Hilton, “Gasification products and technologies

for Pakistani’s coal”, Pakistan Coal forum, 2010.

M.M. Majoumerd, D. Sudipta, M. Assadi and P. Breuhaus,

“An EU initiative for future generation of IGCC power plants

using hydrogen-rich syngas; Simulation results for the baseline

configuration”, Appl. Energ.,. vol. 99, pp.280-290, 2012.

Z.I. Zaidi, “Pakistan renewable energy report”, United Nations

Economic and Social Commission for Asia and the Pacific, 2011.

G. Raggio, A. Pettinau, A. Orsini and M. Fadda, “Coal gasification

pilot plant for hydrogen production. Part B: syngas conversion and

hydrogen separation”, Proceeding of the Second International

Conference on Clean Coal Technologies for our Future Castiadas,

Sardinia, Italy, pp. 10-12, May 2005.

A. Lotri, M. Sekavenik, C. Kunze and H. Spliethoff, “Simulation

of water gas shift membrane reactor for integrated gasification

combined cycle plant with CO2 capture”, J. Mech. Engg., vol. 12,

pp. 911-926, 2011.

G.O. Garcia and D. Peter., E. Croiset and

L. Zheng,“Technoeconomic evaluation of IGCC power plants for

CO2 avoidance”,“Energ. Convers. Manage.”, vol. 47, pp. 2250-

, 2006.

C. G. Cortes., E. Tzimas and S.D. Peteves., “Technologies for coal

based hydrogen and electricity co-production power plants with

CO2 capture”, JRC Scientific and Technical Reports, vol. 1,

pp.172, 2009.

E.P. Jorge, J.J.O. Martinez., J.C.G. Rivera, R.S. Ramirez and

G. Gordillo, “Simulation of synthesis gas production from steam

oxygen gasification of Colombian coal using aspen plus”,

Energies, vol. 5, pp. 4924-4940, 2012.

S.R.J. Byron, M. Loganathan and M. S. Shantha, “A Review of the

water gas shift reaction kinetics”, Int. J. Chem. Reac. Eng., vol. 8,

pp. 1-32, 2010.

C. Chen and E.S. Rubin,“CO2 control technology effects on IGCC

plant performance and cost”, Energy Policy, vol. 37, pp. 915-924,

C. Kunze and H. Spliethoff, “Modeling of an IGCC plant with

carbon capture for 2020”, Fuel Process. Technol., vol. 91, pp. 934-

, 2010.

F. Emun, M. Gadalla and T. Majozi, D. Boer, “Fuel Processing

Technology, Integrated gasification combined cycle (IGCC)

process simulation and optimization”, Comp. Chem. Engg., vol.

, pp. 331-338, 2010.

C.M. Kalamaraz, P. Panagiotopoulou, D.I. Kondarides and

A.M. Efstathiou,“Kinectic and mechanistic studies of the watergas shift reactor on Pt/TiO2 catalyst”, J. Catal.,

vol. 264, pp.117-129, 2009.

J.G.E. Rana and Z.J. Yu, “Catalytic gasification of Pakistani

Lakhra and Thar lignite chars in steam gasification”, ”J. Fuel.

Chem. Technol, vol. 37, pp.11-19, 2009.

S. Aziz, S.A. Soomro, A.H. Tunio, A. Nazir, K.M. Qureshi and

R. Begum, Environmental & health hazards of fly ash & SOx from

FBC power plant at Khanote”, Pak. J. Anal .Environ, Chem.,

vol. 11, pp. 56-62, 2010.

S.M. Walton, X. He, B.T. Zigler and M.S. Wooldridge,

“An experimental investigation of the ignition properties of

hydrogen and carbon monoxide mixtures for syngas turbine

applications”, Proc. of the Combustion Institute,

vol. 31, pp.3147-3154, 2007.


Refbacks

  • There are currently no refbacks.