Rückgewinnungsanlagen für CO2 als Nebenprodukt aus natürlichen Quellen

ASCO’s innovative CO₂ Gas Recovery technology turns vented gas from natural origin into profitable CO₂.

Such natural sources include for example natural underground wells (furamoles) and offer a great opportunity to recover the CO₂ gas which would be otherwise vented to atmosphere.

ASCO CO₂ gas recovery plants enhance the overall concept for your recovery opportunity considering the following key benefits:

• ASCO’s CO₂ gas recovery plants offer recovery from natural sources;
• Our advanced state of the art technology is strategically positioned for lowest cost production/ton;
• The environmentally friendly technology – gas scrubbing, purifying, drying - eliminates chemical treatment and handling;
• Totally automatic process – plant operations and liquid CO₂ tank system management;
• The CO₂ gas recovery system achieves liquid CO₂ purity of 99.998% from an inlet CO₂ gas source purity as low as 98.5%;
• Final liquid CO₂ quality exceeds international food and beverage standards.
• Capacities available from 500 to 4'150 kg / hr (other capacities on request)

General Process Description

CO2 gas can be generated from natural origin (e.g. from natural underground wells). These source gases then can be reclaimed for feed to the ASCO CO2 gas recovery system.

The recovery plant compresses CO2 gas, elevating the pressure to approximately 18 bar g. for CO2 gas processing that being: washing, purifying, drying and CO2 gas condensing. Our selection of specially designed compressors offer the best in energy utilization, dry gas compression and ease of maintenance.

Once compressed, CO2 gas is treated for removal of impurities typical of these sources by high pressure high efficiency CO2 gas washing (scrubbing) providing a CO2 purity of min 99.9 %.

ASCO’s system design further enhances the gas quality by proper CO2 gas purifying. This is accomplished by an activated desiccant bed for gas drying to a dew point of minus 40°C at pressure (-62°C at atmospheric pressure) followed by carbon polish filter, again subject to raw gas and process conditions. Once the operation is completed, the final gas will be odour free, colour free and taste free, preparing for the last stages of purification.

As a means of final purification the CO2 gas is condensed (separation of non-condensable gases). CO2 gas condensing is accomplished by use of an independent refrigeration system that liquefies CO2 gas at approximately 18 bar g. and minus 24°C. The non-condensable gases present in the CO2 gas are separated and purged from the system automatically and reused for regeneration gas within the plant.

Liquid CO2 leaving the CO2 condenser flows by gravity to a liquid CO2 purification system to achieve a final liquid CO2 purity of 99.998 %. Thereafter, high quality liquid CO2 is pumped to a liquid CO2 storage tank for handling the liquid CO2 such as bulk supply, cylinder supply, dry ice supply for chilling or dry ice supply for blast cleaning.

ASCO welcomes the opportunity to assist you with your CO₂ system requirements and looks forward to hearing from you. Please contact us!