Thermodynamic analysis and techno-economic assessment of synthetic natural gas production via ash agglomerating fluidized bed gasification using coal as fuel |
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| Affiliation: | 1. College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan, 454003, People''s Republic of China;2. Henan Key Laboratory of Coal Green Conversion, Henan Polytechnic University, Jiaozuo, Henan, 454003, People''s Republic of China;3. State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi, 030001, People''s Republic of China;1. State Key Laboratory of Multiphase Flow in Power Engineering, School of Chemical Engineering and Technology, Xi’an Jiaotong University, Xi’an 710049, China;2. Department of Chemical Engineering, Monash University, VIC 3800, Australia;1. Department of Chemical Engineering, Inner Mongolia University of Technology, Inner Mongolia Key Laboratory of High-Value Functional Utilization of Low Rank Carbon Resource, Inner Mongolia Key Laboratory of Industrial Catalysis, Huhhot 010051, Inner Mongolia, China;2. Tianjin Win Future Environmental Protection Technology Co. Ltd., Tianjin 300308, China;1. CSIR-Central Institute of Mining and Fuel Research, Digwadih Campus, P.O.- FRI, Dhanbad 828108, Jharkhand, India;2. Indian School of Mines, P.O. ISM, Dhnabad 826004, Jharkhand, India;1. Graduate School of Environmental Engineering, Republic of Korea;2. Graduate School of Energy and Environmental System Engineering, University of Seoul, 163 Siripdaero, Dongdaemun-Gu, Seoul, 02504, Republic of Korea |
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| Abstract: | Implementing coal to synthetic natural gas (SNG) is a key way to deal with the conflict between supply and demand of natural gas in China. For the coal to SNG process, gasification is a crucial unit, which determines the syngas composition and influences cost of coal to SNG system. In this current study, a coal to SNG system using ash agglomerating fluidized bed gasification is designed and modeled. According to the above results, the thermal performance and technoeconomic assessment of the coal to SNG system are performed. The research demonstrates that exergy efficiency and energy efficiency of the whole system are 55.37% and 61.50%, respectively. Additionally, the results of the economic evaluation show that the SNG production cost is 1.87 CNY/Nm3 with a coal price of 250 CNY/t and an electricity price of 0.65 CNY/kWh. Sensitivities to variables such as water price, electricity price, total equipment cost and coal price are performed. Coal price represents the most important sensitivity, but the sensitivity to water price is relatively small. |
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| Keywords: | Thermodynamic analysis Techno-economic assessment Ash agglomerating fluidized bed Synthetic natural gas Coal |
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