Lee, Hyung Won Kim, Young-Min Jae, Jungho Sung, Bong Hyun Jung, Sang-Chul Kim, Sang Chai Jeon, Jong-Ki Park, Young-Kwon 2024-01-20T03:03:03Z 2024-01-20T03:03:03Z 2021-09-04 2016-11 0165-2370 https://pubs.kist.re.kr/handle/201004/123526 The two-stage catalytic pyrolysis of lignin over in-situ natural zeolite (NZ) and ex-situ HZSM-5 was examined using a tandem fixed bed reactor. The physicochemical properties of the catalysts, HZSM-5 and NZ, were characterized by N-2 adsorption-desorption and temperature programed desorption of ammonia. The overall performance for the catalytic pyrolysis of lignin was evaluated by the comparing lignin conversion, aromatic formation, and amount of coke deposited from the two-stage catalytic pyrolysis with those from a single-stage catalytic pyrolysis with ex-situ HZSM-5. Compared to the single-stage catalytic pyrolysis, the two-stage catalytic pyrolysis produced a larger amount of aromatics with a smaller amount of coke due to the pre-catalytic effect of NZ. These positive effects caused by the use of the two-stage catalyst were maximized by increasing the amounts of in-situ natural zeolite and the temperature of the ex-situ HZSM-5 catalyst bed to 600 degrees C. (C) 2016 Elsevier B.V. All rights reserved. English ELSEVIER SCIENCE BV KRAFT LIGNIN BIO-OIL CONVERSION BIOMASS CHEMICALS ESTERIFICATION ADDITIVES AROMATICS PRODUCTS Catalytic pyrolysis of lignin using a two-stage fixed bed reactor comprised of in-situ natural zeolite and ex-situ HZSM-5 Article 10.1016/j.jaap.2016.09.015 1 JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS, v.122, pp.282 - 288 JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS 122 282 288 scie scopus 000390496300032 2-s2.0-84994460678 Chemistry, Analytical Energy & Fuels Engineering, Chemical Chemistry Energy & Fuels Engineering Article KRAFT LIGNIN BIO-OIL CONVERSION BIOMASS CHEMICALS ESTERIFICATION ADDITIVES AROMATICS PRODUCTS Lignin Catalytic pyrolysis Two-stage reactor Natural zeolite HZSM-5