Research Papers: Gas Turbines: Combustion, Fuels, and Emissions

Coal Based Cogeneration System for Synthetic/Substitute Natural Gas and Power With CO2 Capture After Methanation: Coupling Between Chemical and Power Production

[+] Author and Article Information
Sheng Li

Laboratory of Integrated Energy System
and Renewable Energy,
Institute of Engineering Thermophysics,
Chinese Academy of Sciences,
P.O. Box 2706,
Beijing100190, China
e-mail: lisheng@iet.cn

Hongguang Jin

Laboratory of Integrated Energy System
and Renewable Energy,
Institute of Engineering Thermophysics,
Chinese Academy of Sciences,
P.O. Box 2706,
Beijing 100190, China
e-mail: hgjin@iet.cn

Lin Gao

Laboratory of Integrated Energy System
and Renewable Energy,
Institute of Engineering Thermophysics,
Chinese Academy of Sciences,
P.O. Box 2706,
Beijing 100190, China
e-mail: gaolin@iet.cn

Contributed by the Combustion and Fuels Committee of ASME for publication in the JOURNAL OF ENGINEERING FOR GAS TURBINES AND POWER. Manuscript received September 28, 2013; final manuscript received February 19, 2014; published online March 21, 2014. Assoc. Editor: Paolo Chiesa.

J. Eng. Gas Turbines Power 136(9), 091501 (Mar 21, 2014) (11 pages) Paper No: GTP-13-1350; doi: 10.1115/1.4026928 History: Received September 28, 2013; Revised February 19, 2014

Cogeneration of synthetic natural gas (SNG) and power from coal efficiently and CO2 capture with low energy penalty during coal utilization are very important technical paths to implement clean coal technologies in China. This paper integrates a novel coal based cogeneration system with CO2 capture after chemical synthesis to produce SNG and power, and presents the energetic and exergy analysis based on the thermodynamic formulas and the use of ASPEN PLUS 11.0. In the novel system, instead of separation from the gas before chemical synthesis traditionally, CO2 will be removed from the unconverted gas after synthesis, whose concentration can reach as high as 55% before separation and is much higher than 30% in traditional SNG production system. And by moderate recycle instead of full recycle of chemical unconverted gas back into SNG synthesis, the sharp increase in energy consumption for SNG synthesis with conversion ratios will be avoided, and by using part of the chemical unconverted gas, power is cogenerated efficiently. Thermodynamic analysis shows that the benefit from both systematic integration and high CO2 concentration makes the system have good efficiency and low energy penalty for CO2 capture. The overall efficiency of the system ranges from 53%–62% at different recycle ratios. Compared to traditional single product systems (IGCC with CO2 capture for power, traditional SNG system for SNG production), the energy saving ratio (ESR) of the novel system is 16%–21%. And compared to IGCC and traditional SNG system, the energy saving benefit from cogeneration can even offset the energy consumption for CO2 separation, and thus zero energy/efficiency penalties for CO2 capture can be realized through system integration when the chemicals to power output ratio (CPOR) varies in the range of 1.0–4.6. Sensitivity analysis hints that an optimized recycle ratio of the unconverted gas and CPOR can maximize system performance (The optimized Ru for ESR maximum is around 9, 4.2, and 4.0, and the corresponding CPOR is around 4.25, 3.89, and 3.84, at τ = 4.94, 5.28 and 5.61), and minimize the efficiency penalty for CO2 capture (The optimized Ru for minimization of CO2 capture energy penalty is around 6.37 and the corresponding CPOR is around 3.97 at τ = 4.94, ε = 16.5). The polygeneration plant with CO2 capture after chemical synthesis has a good thermodynamic and environmental performance and may be an option for clean coal technologies and CO2 emission abatement.

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Gassner, M., and Maréchal, F., 2009, “Thermo-Economic Process Model for Thermochemical Production of Synthetic Natural Gas (SNG) From Lignocellulosic Biomass,” Biomass Bioenergy,” 33(11), pp. 1587–1604. [CrossRef]
van der Meijden, C. M., Veringa, H. J., and Rabou, L. P. L. M., 2010, “The Production of Synthetic Natural Gas (SNG): A Comparison of Three Wood Gasification Systems for Energy Balance and Overall Efficiency,” Biomass Bioenergy, 34(3), pp. 302–311. [CrossRef]
Chandel, M., and Williams, E., 2009, “Synthetic Natural Gas (SNG): Technology, Environmental Implications, and Economics,” Climate Change Policy Partnership,” Duke University, Durham, NC, available at: http://www.canadiancleanpowercoalition.com/pdf/SNG3%20-%20synthetic.gas.pdf
Office of Fossil Energy, 2006, “Practical Experience Gained During the First Twenty Years of Operation of the Great Plains Gasification Plant and Implications for Future Projects,” U.S. Department of Energy, Washington, DC, available at: http://www.elmiraohio.com/Gasifier%20Docs/dg_knowledge_gained.pdf
Li, S., Jin, H., and Gao, L., 2013, “Cogeneration of Substitute Natural Gas and Power From Coal by Moderate Recycle of the Chemical Unconverted Gas,” Energy, 55, pp. 658–667. [CrossRef]
Kopyscinski, J., Schildhauer, T. J., and Biollaz, S. M. A., 2010, “Production of Synthetic Natural Gas (SNG) From Coal and Dry Biomass—A Technology Review From 1950 to 2009,” Fuel, 89(8), pp. 1763–1783. [CrossRef]
Duret, A., Friedli, C., and Maréchal, F., 2005, “Process Design of Synthetic Natural Gas (SNG) Production Using Wood Gasification,” J. Cleaner Prod., 13(15), pp. 1434–1446. [CrossRef]
Nagase, S., Takami, S., Hirayama, A., and Hirai, Y., 1998, “Development of a High Efficiency Substitute Natural Gas Production Process,” Catal. Today, 45(1–4), pp. 393–397. [CrossRef]
Gray, D., Salerno, S., and Tomlinson, G., 2004, “Polygeneration of SNG, Hydrogen, Power, and Carbon Dioxide From Texas Lignite,” National Energy Technology Laboratory, U.S. Department of Energy, Washington, DC, NETL Contract No. DE-AM26-99FT40465.
Wang, M. H., Li, Z., and Ma, L. W., 2008, “Technical and Economic Analysis on Pithead Coal to Substitute Natural Gas System and Its Developing Route in China,” Modern Chem. Ind., 28(3), pp. 13–16, available at: http://en.cnki.com.cn/Article_en/CJFDTOTAL-XDHG200803005.htm
Bu, X. P., Wang, P., Xin, S. H., Liang, D. M., and Gi, X. G., 2007, “Analysis of Coal Gasification/Poly-Generation to Produce Substitute Natural Gas (SNG),” Coal Chem. Ind., 6, pp. 4–7, available at: http://en.cnki.com.cn/Article_en/CJFDTOTAL-MHGZ200706003.htm
National Energy Technology Laboratory (NETL), 2011, “Cost and Performance Baseline for Fossil Energy Plants—Volume 2: Coal to Synthetic Natural Gas and Ammonia,” U.S. Department of Energy, Washington, DC., Report No. DOE/NETL–2010/1402.
Karellas, S., Panopoulos, K. D., Panousisa, G., Rigas, A. Karl, J., and Kakaras, E., 2012, “An Evaluation of Substitute Natural Gas Production From Different Coal Gasification Processes Based on Modeling,” Energy, 45(1), pp. 183–194. [CrossRef]
Gassner, M., and Maréchal, F., 2012, “Thermo-Economic Optimisation of the Polygeneration of Synthetic Natural Gas (SNG), Power and Heat From Lignocellulosic Biomass by Gasification and Methanation,” Energy Environ. Sci., 5(2), pp. 5768–5789. [CrossRef]
Tremel, A., Gaderer, M., and Spliethoff, H., 2013, “Small-Scale Production of Synthetic Natural Gas by Allothermal Biomass Gasification,” Int. J. Energy Res., 37(11), pp. 1318–1330. [CrossRef]
Arvidsson, M., Heyne, S., Morandin, M., and Harvey, S., 2012, “Integration Opportunities for Substitute Natural Gas (SNG) Production in an Industrial Process Plant,” Chem. Eng., 29, pp. 331–336. [CrossRef]
Jin, H. G., and Gao, L., 2009, “Polygeneration System for Power and Liquid Fuel With Sequential Connection and Partial Conversion Scheme,” ASME Paper No. GT2009-59927. [CrossRef]
Jin, H. G., Gao, L., Han, W., and Yan, J. Y., 2007, “A New Approach Integrating CO2 Capture Into a Coal-Based Polygeneration System of Power and Liquid Fuel,” ASME Paper No. GT2007-27678. [CrossRef]
Gao, L., Li, H. Q., Chen, B., Jin, H. G., Lin, R. M., and Hong, H., 2008, “Proposal of a Natural Gas-Based Polygeneration System for Power and Methanol Production,” Energy, 33(2), pp. 206–212. [CrossRef]
Steubing, B., Zah, R., and Ludwig, C.2011, “Life Cycle Assessment of SNG From Wood for Heating, Electricity, and Transportation,” Biomass Bioenergy, 35(7), pp. 2950–2960. [CrossRef]
Jensen, J. H., Poulsen, J. M., and Andersen, N. U., 2011, “From Coal to Clean Energy,” Nitrogen+Syngas, 310 (March-April), available at: http://www.topsoe.com/business_areas/gasification_based/Processes/~/media/PDF%20files/Gasification/topsoe_from_coal_to%20clean%20energy_nitrogen_syngas_march_april_2011.ashx, accessed January 7, 2013.
Gao, L., Jin, H. G., Liu, Z. L., and Zheng, D. X., 2004, “Exergy Analysis of Coal-Based Polygeneration System for Power and Chemical Production,” Energy, 29(12–15), pp. 2359–2371. [CrossRef]
Wang, S. L., Zhang, X. L., Chen, H. P., and Zhou, L. X., 2006, “Modeling of Air Separation System Based on Cryogenic Technique,” J. N. China Electr. Power Univ., 33(1), pp. 66–64.
Chen, J., and Liu, Y. Z., 2009, “Discussion on Simulation of Distillation Operation in Rotating Packed Bed by ASPEN PLUS,” Contem. Chem. Ind., 38(1), pp. 20–17.
Machteld, B., Ric, H., Edward, R., Wim, T., and André, F., 2009, “Effects of Technological Learning on Future Cost and Performance of Power Plants With CO2 Capture,” Prog. Energy Combust. Sci., 35, pp. 457–480. [CrossRef]
Kemble, S., Manfrida, G., Milazzo, A., and Buffa, F., 2012, “Thermoeconomics of a Ground-Based CAES Plant for Peak-Load Energy Production System,” 25th International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems (ECOS 2012), Perugia, Italy, June 26–29.
Bejan, A., Tsatsaronis, G., and Moran, M., 1996, Thermal Design and Optimization, Wiley Interscience, New York.
Kotas, T. J., 1985, The Exergy Method of Thermal Plant Analysis, Butterworths, London.
Gao, L., 2005, “Investigation of Coal-Based Polygeneration Systems for Production of Power and Liquid Fuel,” Ph.D. thesis, Graduate School of Chinese Academy of Sciences (Institute of Engineering Thermophysics), Beijing.


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Fig. 1

Traditional SNG production system

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Fig. 2

Power losses for SNG synthesis at different conversion ratios in traditional SNG plant [5]

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Fig. 3

(a) Coal based SNG and power PG plant with CO2 capture after chemical synthesis (b) PG plant with CO2 capture before chemical synthesis

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Fig. 4

Diagram of IGCC with CO2 capture

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Fig. 5

Main factors impacting polygeneration performance

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Fig. 6

(a) Effects of recycle ratio on SNG conversion ratio and overall efficiency, and (b) effects of SNG conversion ratio on exergy losses of chemical synthesis in PG plant

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Fig. 7

Effects of the CPOR on ESR (a) PG plant with CO2 removal after SNG synthesis, and (b) PG plant with CO2 removal before SNG synthesis (IGCC+CC and traditional SNG system as reference plants) [5]

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Fig. 8

Effects of CO2 separation efficiency on η and ESR

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Fig. 9

CO2 enrichment mechanisms in the polygeneration system

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Fig. 10

The energy/efficiency penalty for CO2 capture




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