Catalytic hydrotreatment of alkaline lignin and its consequent influences on fast pyrolysis
The current state of lignin has been characterized by these three: (1) as one of the main components in lignocellulosic biomass with an abundant amount; (2) not be taken seriously but treated as a waste product; (3) underutilized due to a complex and stubborn structure. However, lignin can be a rich...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
KeAi Communications Co., Ltd.
2021-01-01
|
| Series: | Carbon Resources Conversion |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S258891332100034X |
| _version_ | 1819173725460758528 |
|---|---|
| author | Lijuan Zhang Cheolyong Choi Hiroshi Machida Zhibao Huo Koyo Norinaga |
| author_facet | Lijuan Zhang Cheolyong Choi Hiroshi Machida Zhibao Huo Koyo Norinaga |
| author_sort | Lijuan Zhang |
| collection | DOAJ |
| description | The current state of lignin has been characterized by these three: (1) as one of the main components in lignocellulosic biomass with an abundant amount; (2) not be taken seriously but treated as a waste product; (3) underutilized due to a complex and stubborn structure. However, lignin can be a rich source for hydrocarbons and aromatic compounds when gives appropriate utilization. In this work, we have studied the hydrotreatment of alkaline lignin (AL) under relatively mild conditions and further investigated the characterization of hydrogenated lignin (HL), especially the behavior during fast pyrolysis. The recovery of the HL decreased with increasing reaction temperature from 60 wt.% to 41 wt.% in the range of 150–250 ℃. The hydrotreated products were analyzed using Elemental Analysis, FTIR (for HL) and GC–MS (for bio-oil). The HL samples were found to have a higher hydrogen/carbon atomic effective ratio (H/Ceff ratio) and a higher degree of saturation than AL. Compared to the internal structure of the lignin before and after hydrotreatment, the side chain groups were removed from AL during the process. After that, from the fast pyrolysis of HL, it was observed that more light hydrocarbons and aromatic compounds were formed than that of AL. Furthermore, fast pyrolysis in the hydrogen atmosphere revealed that more volatile fractions were released compared to the Helium atmosphere. The total olefins yield was increased for HL compared AL from 1.02 wt.% to 3.1 wt.% at 250 ℃ for 7 hours. This study of HL is instructive to some extent for the industrial utilization of lignin. |
| first_indexed | 2024-12-22T20:27:39Z |
| format | Article |
| id | doaj.art-47e8b7473c3d4628988ff1fa7619fe95 |
| institution | Directory Open Access Journal |
| issn | 2588-9133 |
| language | English |
| last_indexed | 2024-12-22T20:27:39Z |
| publishDate | 2021-01-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Carbon Resources Conversion |
| spelling | doaj.art-47e8b7473c3d4628988ff1fa7619fe952022-12-21T18:13:41ZengKeAi Communications Co., Ltd.Carbon Resources Conversion2588-91332021-01-014219229Catalytic hydrotreatment of alkaline lignin and its consequent influences on fast pyrolysisLijuan Zhang0Cheolyong Choi1Hiroshi Machida2Zhibao Huo3Koyo Norinaga4Department of Chemical Systems Engineering, Graduate School of Engineering, Nagoya University, Aichi 464-8603, JapanDepartment of Chemical Systems Engineering, Graduate School of Engineering, Nagoya University, Aichi 464-8603, JapanDepartment of Chemical Systems Engineering, Graduate School of Engineering, Nagoya University, Aichi 464-8603, JapanSchool of Environmental Science and Engineering, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, ChinaDepartment of Chemical Systems Engineering, Graduate School of Engineering, Nagoya University, Aichi 464-8603, Japan; Corresponding author at: Department of Chemical Systems Engineering, Graduate School of Engineering, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603, Aichi, Japan.The current state of lignin has been characterized by these three: (1) as one of the main components in lignocellulosic biomass with an abundant amount; (2) not be taken seriously but treated as a waste product; (3) underutilized due to a complex and stubborn structure. However, lignin can be a rich source for hydrocarbons and aromatic compounds when gives appropriate utilization. In this work, we have studied the hydrotreatment of alkaline lignin (AL) under relatively mild conditions and further investigated the characterization of hydrogenated lignin (HL), especially the behavior during fast pyrolysis. The recovery of the HL decreased with increasing reaction temperature from 60 wt.% to 41 wt.% in the range of 150–250 ℃. The hydrotreated products were analyzed using Elemental Analysis, FTIR (for HL) and GC–MS (for bio-oil). The HL samples were found to have a higher hydrogen/carbon atomic effective ratio (H/Ceff ratio) and a higher degree of saturation than AL. Compared to the internal structure of the lignin before and after hydrotreatment, the side chain groups were removed from AL during the process. After that, from the fast pyrolysis of HL, it was observed that more light hydrocarbons and aromatic compounds were formed than that of AL. Furthermore, fast pyrolysis in the hydrogen atmosphere revealed that more volatile fractions were released compared to the Helium atmosphere. The total olefins yield was increased for HL compared AL from 1.02 wt.% to 3.1 wt.% at 250 ℃ for 7 hours. This study of HL is instructive to some extent for the industrial utilization of lignin.http://www.sciencedirect.com/science/article/pii/S258891332100034XAlkaline ligninHydrotreatmentHydrogenated ligninFast pyrolysisHydrogen atmosphere |
| spellingShingle | Lijuan Zhang Cheolyong Choi Hiroshi Machida Zhibao Huo Koyo Norinaga Catalytic hydrotreatment of alkaline lignin and its consequent influences on fast pyrolysis Carbon Resources Conversion Alkaline lignin Hydrotreatment Hydrogenated lignin Fast pyrolysis Hydrogen atmosphere |
| title | Catalytic hydrotreatment of alkaline lignin and its consequent influences on fast pyrolysis |
| title_full | Catalytic hydrotreatment of alkaline lignin and its consequent influences on fast pyrolysis |
| title_fullStr | Catalytic hydrotreatment of alkaline lignin and its consequent influences on fast pyrolysis |
| title_full_unstemmed | Catalytic hydrotreatment of alkaline lignin and its consequent influences on fast pyrolysis |
| title_short | Catalytic hydrotreatment of alkaline lignin and its consequent influences on fast pyrolysis |
| title_sort | catalytic hydrotreatment of alkaline lignin and its consequent influences on fast pyrolysis |
| topic | Alkaline lignin Hydrotreatment Hydrogenated lignin Fast pyrolysis Hydrogen atmosphere |
| url | http://www.sciencedirect.com/science/article/pii/S258891332100034X |
| work_keys_str_mv | AT lijuanzhang catalytichydrotreatmentofalkalineligninanditsconsequentinfluencesonfastpyrolysis AT cheolyongchoi catalytichydrotreatmentofalkalineligninanditsconsequentinfluencesonfastpyrolysis AT hiroshimachida catalytichydrotreatmentofalkalineligninanditsconsequentinfluencesonfastpyrolysis AT zhibaohuo catalytichydrotreatmentofalkalineligninanditsconsequentinfluencesonfastpyrolysis AT koyonorinaga catalytichydrotreatmentofalkalineligninanditsconsequentinfluencesonfastpyrolysis |