Hybrid Energy System for a Coal-Based Chemical Industry

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Chen, Q
Lv, M
Gu, Y
Yang, X
Tang, Z
Sun, Y
Jiang, M
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2018
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Abstract

Although renewable power generation has become the most promising alternative of fossil fuel power generation given its advantage to reduce carbon emission, fossil fuel remains essential for providing the necessary “carbon” for human life. The coal gasification to chemicals process is one of the major carbon necessities to supply technologies but emits copious CO2 due to the adjustment of the H/C ratio of syngas through the water-gas shift unit. It is clear that clean hydrogen supply is the key to CO2 emission reduction in coal chemical industries. Hence, a hybrid energy system has been proposed as an effective and reasonable solution to integrate nuclear/renewable energy with coal for low-carbon fuel and chemicals production. In terms of resources endowment, geographical distribution, and industry development, we found that the hybrid system is applicable in coal-rich countries and will lead to more than 1,200 Mt CO2 emission reduction potential, which is equivalent to 90% of the CO2 emission of Japan in 2014. Moreover, the feasibility of carbon-neutral cycle via CO2 capture and conversion system to produce fuel and chemicals with zero carbon emission is analyzed. From the economic point of view, power generation cost from nuclear/renewable energy and the carbon trading policy are essential for the economic superiority of hybrid energy systems. We believe that the decarbonization approach to fossil fuel utilization will be achieved with the development of key low-carbon technologies.

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Environmental sciences
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