US 12,391,556 B1
Carbon dioxide capture using activated carbon derived from spent coffee grounds
Haif Aljomard, Sharjah (AE); Abrar Inayat, Sharjah (AE); Rafik Kalfat, Sharjah (AE); and Chaouki Ghenai, Sharjah (AE)
Assigned to UNIVERSITY OF SHARJAH, Sharjah (AE)
Filed by UNIVERSITY OF SHARJAH, Sharjah (AE)
Filed on Mar. 13, 2025, as Appl. No. 19/079,043.
Int. Cl. B01D 53/02 (2006.01); B01J 20/20 (2006.01); B01J 20/30 (2006.01); C01B 32/324 (2017.01); C01B 32/348 (2017.01)
CPC C01B 32/324 (2017.08) [B01D 53/02 (2013.01); B01J 20/20 (2013.01); B01J 20/3078 (2013.01); C01B 32/348 (2017.08); B01D 2253/102 (2013.01); B01D 2257/504 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A method of capturing carbon dioxide, the method comprising:
synthesising activated carbon, comprising:
mixing a lignocellulosic feed with a plastic feed to create a feedstock, wherein the lignocellulosic feed comprises spent coffee grounds (SCG), and wherein the plastic feed comprises polyethylene terephthalate (PET);
mixing the feedstock with an activation agent to form a mixture, wherein the activation agent comprises potassium hydroxide (KOH);
co-pyrolyzing the mixture at a temperature of less than 500 degrees Celsius; and
activating the mixture at a temperature of less than 700 degrees Celsius;
adsorbing carbon dioxide onto a surface of the synthesized activated carbon at a rate of greater than 8 mmol/g at 0 degrees Celsius and at 1 bar absolute pressure.