Method for producing liquefied natural gas having an adjusted higher calorific power

摘要

The invention relates to a method for treating natural gas containing propane and/or butane, including the following steps: extracting at least one portion of the propane and/or butane from the natural gas to provide a light natural gas; cooling and liquefying the light natural gas to provide a light liquefied natural gas; mixing a portion of the light liquefied natural gas with the extracted propane and/or butane to provide a heavy liquefied natural gas; the mixing step being performed in a liquefied natural gas production facility. The invention also relates to a liquefied natural gas production facility suitable for implementing said method.