US 12,263,463 B2
Biomass pyrolysis systems and methods for metal removal from biofuel
Everett J. O'Neal, Asbury, NJ (US)
Assigned to ExxonMobil Technology and Engineering Company, Annandale, NJ (US)
Filed by ExxonMobil Technology and Engineering Company, Annandale, NJ (US)
Filed on Mar. 3, 2021, as Appl. No. 17/190,478.
Claims priority of provisional application 63/032,765, filed on Jun. 1, 2020.
Prior Publication US 2021/0370261 A1, Dec. 2, 2021
Int. Cl. B01J 20/20 (2006.01); B01D 53/04 (2006.01); B01J 6/00 (2006.01); B01J 20/30 (2006.01); C01B 32/318 (2017.01); C02F 1/28 (2023.01); C02F 101/10 (2006.01); C02F 101/20 (2006.01); C02F 103/28 (2006.01); C10G 1/00 (2006.01); C10L 1/02 (2006.01)
CPC B01J 20/20 (2013.01) [B01D 53/04 (2013.01); B01J 6/008 (2013.01); B01J 20/3078 (2013.01); B01J 20/3085 (2013.01); C01B 32/318 (2017.08); C02F 1/283 (2013.01); C10G 1/002 (2013.01); C10L 1/02 (2013.01); B01D 2253/102 (2013.01); B01D 2257/302 (2013.01); B01D 2257/304 (2013.01); B01D 2257/60 (2013.01); C02F 2101/101 (2013.01); C02F 2101/20 (2013.01); C02F 2103/28 (2013.01); C10G 2300/1011 (2013.01); C10G 2300/202 (2013.01); C10G 2300/205 (2013.01); C10L 2200/0469 (2013.01); C10L 2290/02 (2013.01); C10L 2290/542 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A method comprising:
deconstructing a lignocellulosic biomass into hemicellulose, cellulose, and lignin, thereby forming an aqueous deconstructed material stream;
separating the lignin from the aqueous deconstructed material stream, thereby forming a lignin-rich stream and a lignin-free stream, wherein the lignin-free stream comprises a reduction in the lignin by weight of at least about 75% by weight of the aqueous deconstructed material stream;
pyrolysing the lignin-rich stream, thereby forming biochar;
activating the biochar, thereby forming activated carbon;
separating the activated carbon into a first portion and a second portion;
performing surface preparation on the activated carbon of the second portion after the separating of the activated carbon to optimize the second portion for H2S removal;
contacting the first portion of the activated carbon with a biofuel produced from the lignin-free stream in a biorefinery;
contacting the second portion of the activated carbon with a recycled biogas produced from the lignin-free stream in the biorefinery to produce H2S reduced recycled biogas; and
after the contacting of the first portion, returning the first portion of the activated carbon to soil.