Dry ice is solid carbon dioxide (CO2). So, it is not possible to make dry ice without CO2. Dry ice is formed when gaseous CO2 is cooled and compressed until it liquefies. Then, it is allowed to expand rapidly, causing it to solidify into a snowy substance known as dry ice.
If you are looking for an alternative to dry ice, you can explore other cooling agents, such as regular ice (frozen water), liquid nitrogen, or various refrigerants, depending on your specific needs. Each of these substances has its own properties and applications for cooling purposes. However, keep in mind that if you want a substance similar to dry ice, you would still need to use CO2 to achieve that effect.