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In order to comply with government requirements, Hillside had to reduce GTCGas Treatment System (GTC) stacks hydrogenHydrogen fluorideFluoride/Particulate emissions (HF) emissionsEmissions below 0.5 mg/Nm3 by end of March 2025. In early 2023, Hillside entrusted Fives with the modification of its 5 GTCsGas Treatment System (GTC) with the integration of the cascade alumina feeding systemCascade alumina feeding system and the conversion of VIBRAIR filters pocket bags into extended surface bags in order to reduce HF emissionsHF emissions by 20–40%. In April 2024, a first cascade feeding system was started and tests were carried out successfully with an encouraging average HF emissionHF emissions value of around 0.3 mg/Nm3. At the end of January 2025, all 5 GTCsGas Treatment System (GTC) were completed and commissioned with cascade alumina feeding systemsCascade alumina feeding system and Cleanova Micronics PrimaflowTMPrimaflowTM StarbagsTMStarbagsTM and Starcages™. In February 2025, performance tests were successfully achieved reducing HF stack emissionsEmissions below 0.5 mg/Nm3. This paper describes the technical solutions implemented to reduce HF emissionsHF emissions, the challenges faced as well as performances achieved.

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Hillside GTCs Challenges with Regard to New Regulation Improving Its HF Stack Emissions

  • 会议论文

  • 发表日期：

    2026年

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  • El Hani Bouhabila,
  • Vincent Verin,
  • Bassam Hureiki,
  • Jérémy Neveu,
  • Baptiste Seffer,
  • Brad Currell

摘要

In order to comply with government requirements, Hillside had to reduce GTCGas Treatment System (GTC) stacks hydrogenHydrogen fluorideFluoride/Particulate emissions (HF) emissionsEmissions below 0.5 mg/Nm3 by end of March 2025. In early 2023, Hillside entrusted Fives with the modification of its 5 GTCsGas Treatment System (GTC) with the integration of the cascade alumina feeding systemCascade alumina feeding system and the conversion of VIBRAIR filters pocket bags into extended surface bags in order to reduce HF emissionsHF emissions by 20–40%. In April 2024, a first cascade feeding system was started and tests were carried out successfully with an encouraging average HF emissionHF emissions value of around 0.3 mg/Nm3. At the end of January 2025, all 5 GTCsGas Treatment System (GTC) were completed and commissioned with cascade alumina feeding systemsCascade alumina feeding system and Cleanova Micronics PrimaflowTMPrimaflowTM StarbagsTMStarbagsTM and Starcages™. In February 2025, performance tests were successfully achieved reducing HF stack emissionsEmissions below 0.5 mg/Nm3. This paper describes the technical solutions implemented to reduce HF emissionsHF emissions, the challenges faced as well as performances achieved.