US 12,441,612 B2
Method for preparing synthesis gas
Sung June Hwang, Daejeon (KR); Tae Woo Kim, Daejeon (KR); Sik Ki, Daejeon (KR); and Sung Kyu Lee, Daejeon (KR)
Assigned to LG Chem, Ltd., Seoul (KR)
Appl. No. 17/800,496
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Dec. 12, 2021, PCT No. PCT/KR2021/018821
§ 371(c)(1), (2) Date Aug. 17, 2022,
PCT Pub. No. WO2022/270702, PCT Pub. Date Dec. 29, 2022.
Claims priority of application No. 10-2021-0082466 (KR), filed on Jun. 24, 2021.
Prior Publication US 2023/0159327 A1, May 25, 2023
Int. Cl. C01B 3/34 (2006.01); B01D 3/14 (2006.01); C10G 7/00 (2006.01)
CPC C01B 3/34 (2013.01) [B01D 3/14 (2013.01); C10G 7/00 (2013.01); C01B 2203/0272 (2013.01); C01B 2203/063 (2013.01); C01B 2203/1235 (2013.01); C01B 2203/1258 (2013.01); C10G 2300/104 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A method for preparing synthesis gas, the method comprising:
supplying a cracked gas stream discharged from a cracking furnace of a naphtha cracking center (NCC) process to a gasoline fractionator;
supplying a side discharge stream of the gasoline fractionator to a first stripper, operating the first stripper under conditions in which a first steam stream is supplied to the first stripper, and separating a pyrolysis gas oil (PGO) stream including a PGO from a lower portion of the first stripper;
splitting a lower discharge stream from the gasoline fractionator into a reflux stream and a supply stream, supplying the supply stream to a second stripper, and operating the second stripper under conditions in which a second steam stream is supplied to the second stripper, and separating a pyrolysis fuel oil (PFO) stream including a PFO from a lower portion of the second stripper; and
supplying a mixed oil stream of the PGO stream and the PFO stream to a combustion chamber for a gasification process to obtain synthesis gas,
wherein the method satisfies the following Equations 1 and 2:
G≥0.5,G=GS/GF  [Equation 1]
F≤0.035,F=FS/FF  [Equation 2]
wherein GF is a flow rate of the side discharge stream from the gasoline fractionator, GS is a flow rate of the first steam stream, FF is a flow rate of the supply stream, and FS is a flow rate of the second steam stream.