Whether it be cream cakes or human tissue - more and more goods are shipped refrigerated or frozen using Dry Ice. Green Gases can supply your Dry Ice needs - and as well as being competitive on price, your dry ice will be of the highest quality AND have a low carbon footprint! The low carbon footprint is achieved by using green energy to process the pellets. Green Gases can supply Dry Ice pellets in diameters of 3mm and 16mm, which cover the majority of applications, from dry ice blasting to cooling. Manufacturing Dry Ice Dry ice manufacturing starts with liquid carbon dioxide held under a pressure of 20bar (300 psi) in bulk storage vessels. Liquid carbon dioxide is sent through an expansion valve into an empty chamber where it flashes into CO2 gas. The phase change from liquid to gas causes the temperature to fall rapidly resulting in the freezing of about 46% of the gas as dry ice ‘snow’. The gaseous phase is released into the atmosphere or recovered. The ‘snow’ is then collected in a chamber where it is compressed into block, pellet or sheet form to meet customers’ requirements. The denser the dry ice is, the longer it will last, the easier it is to handle, and the better it will perform when used in blast cleaning machinery. Some Dry Ice tips It is vital to use a good insulated container. A thick well insulated purpose built unit of the type Green Gases supply will reduce the amount of dry ice needed and allow extended shipping times. Although it sounds obvious, it's worth pointing out that only goods which can be frozen can be shipped using Dry ice. For Dry Ice plan on using 2 to 5 Kg for each 24-hour period depending upon the quality of the insulated shipping container. This will keep everything frozen in a container up to 10 Litres. For larger containers and greater shipping times, multiply dry ice quantities by this rate. The best shipping container is a two-inch thick urethane insulated box tested to lose only 2.5 Kg for a 10 Litres storage volume every 24-hours. Remember the Golden rule is “Less thick or efficient insulation will need more Dry Ice” - it will sublime faster. Find out more To download our Dry Ice Factsheet in PDF format, click here. For more information, please contact us.