Question

What is the approximate composition of carbon dioxide in biogas, and what is its effect on the fuel quality?

विकल्प

• Trace amounts; is highly corrosive

• Approximately 30-40%; reduces calorific value as it is non-combustible

• Approximately 10-20%; is a combustible component

• Approximately 55-65%; increases calorific value

Answer 1

Carbon dioxide (CO₂) constitutes approximately 30-40% of biogas composition. Although CO₂ is non-combustible and does not contribute to energy generation, its presence in biogas reduces the overall calorific value. The combustible component - methane - makes up only 55-65%, meaning that a significant portion of the biogas volume does not contribute to energy output, which is an important consideration when calculating the energy efficiency of biogas systems.