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Reducing the cost of industrial decarbonization: Demand response by combined product and energy storage for chlor-alkali electrolysis and vinyl chloride monomer production
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  • Sverre Stefanussen Foslie ,
  • Julian Straus ,
  • Brage Rugstad Knudsen ,
  • Magnus Korpås
Sverre Stefanussen Foslie
SINTEF Energy Research, SINTEF Energy Research, SINTEF Energy Research

Corresponding Author:[email protected]

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Julian Straus
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Brage Rugstad Knudsen
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Magnus Korpås
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Abstract

We assess the potential of joint product and energy-storage enabled demand response for the integrated chlor-alkali electrolysis (CAE) and vinyl chloride monomer (VCM) production process for reducing emission abatement costs. Demand response will become increasingly important in power grids with high shares of variable renewables, yet the existing knowledge on how the electricity demand and flexibility will change with  large-scale, decarbonized industrial demands is limited.
Here we develop a mixed-integer linear optimization model which we use to compare cost and flexibility of decarbonization options for the combined CAE and VCM process, including hydrogen import and sales of surplus production. Our results show that flexible operation of the CAE process is deemed technically possible but limited by internal process dependencies. Combining energy and product storage for demand response enables up to 4~\% operational cost reduction by shifting loads during peak price hours. High overcapacity of the electrolyzer is required to release the full flexibility potential of the process, while enabling sales of surplus hydrogen production to an external market can facilitate enables the necessary OPEX reduction for full electrification of the thermal cracker. Full decarbonization of the combined CAE and VCM process appears difficult without increased operational cost, while our study emphasizes demand response through multiple flexilible options is a viable pathway for minimizing the added cost and should be incentivized.
Dec 2023Published in Advances in Applied Energy volume 12 on pages 100152. 10.1016/j.adapen.2023.100152