Specific Gases

Specific Gases

Selective Separation and Concentration of Specific Gases from Mixed Gases (Adjusting Components of City Gas, Methane Fermentation)

Adjusting Components of City Gas

  Natural gas, the raw material for city gas, varies in its calorific value depending on the source and type. This variation is due to the different ratios of gas components such as methane, ethane, and propane it contains. City gas needs to be adjusted to specified levels of these components. If the ratios of these gases are not appropriate, incomplete combustion can occur during burning, potentially producing harmful substances like carbon monoxide.

  By using hollow fiber separation membranes, it’s possible to adjust these complex gas components. The principle of component adjustment is straightforward. By exploiting the different permeabilities of each gas component through the separation membrane, specific gases can be separated from the mixed gas, adjusting them to the desired concentration.

  Furthermore, city gas can contain impurities like sulfur compounds and steam, which may corrode gas pipelines and other infrastructure. These impurities can cause failures and corrosion when they adhere to combustion appliances. Using the same principle mentioned earlier, these impurities can also be removed by employing hollow fiber separation membranes.

  In terms of adjusting gas components, there are other methods available, such as those using adsorbents. However, using hollow fiber separation membranes can make the equipment more compact. Additionally, compared to traditional methods, it reduces energy consumption, contributing to cost savings and lower environmental impact.

Methane Fermentation

  Methane fermentation is a process in which microorganisms break down organic material under anaerobic conditions to produce biogas, consisting of methane and carbon dioxide. Hollow fiber separation membranes can be utilized to purify biogas. For example, they can remove unnecessary components from biogas, increase the concentration of methane, and adjust it for use as fuel.

  Furthermore, when microorganisms generate biogas through fermentation, capturing the excess gas components can enhance the production yield of useful components. Hollow fiber separation membranes can also be employed in this process. NAGASEP, with its non-clogging hollow fiber membranes, enables continuous separation and recovery. This facilitates the efficient and stable production of biogas.