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ASCO’s innovative ASCOSORB CO2 stack gas recovery technology turns your vent flue gas into a usable and profitable source of CO2. CO2 gas won by a CO2 Stack Gas Recovery System is a by-product of flue gas production from boilers as well as from other flue gas sources offering an economic CO2 source to any CO2 consumer or reseller.More Information Product Leaflet(PDF)
ASCO’s innovative CO2 gas recovery technology turns your vented by-product gas into profitable CO2. Be it from an alcoholic fermentation process, other industrial sources (e.g. ammonia or ethylene oxide production) or natural sources, ASCO finds your individual CO2 recovery solution..More Information Product Leaflet(PDF)
ASCO CO2 Gas Recovery Systems can be applicable to a variety of sources.
Our advanced technology is strategically positioned offering lowest cost production/ton.
The environmentally friendly technology – gas scrubbing, purifying, drying-eliminates chemical treatment and handling and offers overall reduced effluent and cost savings/ton.
Totally automatic process – plant operations and liquid CO2 tank farm management.
The ASCO 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.
other capacities on request.
Experience of many generations has contributed to ASCO's ability to offer complete solutions for CO2 projects. From complete CO2 production plants or CO2 recovery plants to CO2 storage, dry ice blasting, CO2 bottling, dry ice production and even dry ice packaging. ASCO has everything to make your CO2 project a successMore
ASCO is acknowledged as one of the leading companies when it comes to CO2-Products. Renown References are a proof of our high quality and reliability.
Our production and recovery plants are used in many industries. In the beverage, gas, chemical and oil industries, but also in desalination and dry ice production.
ASCO not only has the right CO2 technology, but also supports you in optimally integrating and optimising CO2 production into the production process.
Years of Dry Ice Production Experience
ASCO Partners worldwide
Countries of ASCO customers
CO2 purity grade possible
Gaseous CO2 can be liquefied under pressure provided its temperature is below 31 °C (87,8 °F), this temperature being referred to as the CRITICAL POINT. If compressed and cooled below the critical point, a colourless fluid, approximately the same density as water, is produced.
CO2 will remain in the liquid form as long as its temperature remains below the critical point but will return to the gaseous state if its temperature rises above this point, regardless of the pressure applied.
Liquid CO2 can be stored indefinitely at high pressure or Low pressure as follows:
High Pressure CO2
High pressure liquid CO2 is produced by compressing the gaseous CO2 in multistage compressors to pressures in the neighbourhood of 69 bar (1000,76 psi) pressure, then cooling it to around 18 °C (64,4 °F). It is customarily filled into specially constructed steel cylinders. Like water, liquid CO2 can be weighed, and this is the normal form of measuring it.
Low Pressure CO2
Low pressure liquid is an alternative method of storing CO2 and is produced either by expanding high pressure CO2 to a lower pressure or by refrigeration. It is held in specially constructed storage tanks, heavily insulated and equipped with refrigeration units to hold the internal tank pressure at or below 21 bar (304,58 psi) and -18 °C (-0.4 °F) temperature. Pressure switches are incorporated to control the refrigeration units and safety mechanism and electrical alarms are fitted to release the tank pressure and raise an alarm in the event of refrigeration malfunction.
Low pressure liquid CO2 (sometimes referred to as “bulk”) is transported to one place from another in insulated road tankers or trailers (or, in some countries, by rail tank wagons), the liquid being simply transferred from mobile to static tank by pumping or gravity feed.
Unlike water, carbon dioxide cannot exist in the open air in liquid form. It must be held under pressure or refrigeration (or a combination of both) to remain in the liquid state.
Dry Ice is the product of processing liquid CO2 . If the pressure of liquid CO2 is suddenly released, a proportion of that liquid will change to the solid state (becoming dry ice “snow”) and the remainder will revert to gas (revert gas). When the snow is compressed under hydraulic or mechanical action, blocks or pellets of dry ice are formed. The revert gas (gaseous CO2 ) can be readily reclaimed and converted back to liquid by recompression and reliquefaction, thence returned to the dry ice block machine or pelletizer for further processing.
The temperature of dry ice is -79 °C (110,2 °F) and in the atmoshere it will pass directly from the solid to the gaseous stage, leaving no moisture or trace of its presence except the cold.