Raw material composition for preparing oxygen carrier particles, oxygen carrier particles prepared by using same, and method for preparing oxygen carrier particles

A method of producing oxygen carriers by spray-drying, the method comprising:

• producing a slurry for producing oxygen carriers by mixing a solvent with a raw material composition;
• stirring the slurry to produce a homogenized slurry;
• spray-drying the homogenized slurry to form solid particles;
• and
• drying and baking the formed solid particles to produce oxygen carriers,
• wherein the raw material composition for producing oxygen carriers, the raw material composition to be calcinated comprises 55 parts by weight to 80 parts by weight of nickel hydroxide, 15 parts by weight to 40 parts by weight of boehmite, and 3 parts by weight to 15 parts by weight of magnesium oxide or magnesium hydroxide, thereby lowering the calcination temperature for improving oxygen transfer performance,
• wherein when the calcination temperature is 1200° C., the oxygen carriers have an oxygen transfer capacity of 12.5 parts by weight to 25 parts by weight based on the total weight of the oxygen carriers and have a wear index obtained by Equation 1 below of 20% or lower:
• AI (%)=[(W2)/(W1)] [Equation 1]
• In Equation 1, W1 represents a weight in g of a sample before the wear test, and W2 represents a weight in g of fine particles captured during the 5 hours of the wear test,
• the wear test is conducted for 5 hours at a flow rate of 10.00 l/min (273.15 K, 1 bar) according to ASTM D5757-95 from the American Society for Testing Materials (ASTM) using a wear tester.