Thermal energy from natural gas (indirect)

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Thermal energy from natural gas (direct)

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Thermal energy from natural gas

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Sulphur (elemental) at refinery (approximation)

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Propane at refinery (approximation)

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Process steam from natural gas 95% (indirect)

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Process steam from natural gas 95% (direct)

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Process steam from natural gas 95%

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Process steam from natural gas 90% (indirect)

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Process steam from natural gas 90% (direct)

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