Knowledge Management System Of Institute of process engineering,CAS
Catalytic Upgrading of in Situ Coal Pyrolysis Tar over Ni-Char Catalyst with Different Additives | |
Alternative Title | Energy Fuels |
Han, Jiangze1,2; Liu, Xiaoxing1; Yue, Junrong1; Xi, Bingfeng1; Gao, Shiqiu1; Xu, Guangwen1 | |
2014-08-01 | |
Source Publication | ENERGY & FUELS
![]() |
ISSN | 0887-0624 |
Volume | 28Issue:8Pages:4934-4941 |
Abstract | Ni-char catalyst doped with different additives was used to catalytically upgrade coal pyrolysis tar in situ generated in a laboratory-scale dual-stage reactor. The additives including Fe, Mg, Ce, Zr were all beneficial to the catalytic activity for tar cracking. The best result of tar upgrading was achieved with Ce-Ni-char at a Ce-to-Ni molar ratio of 0.4. The upgrading test at 500 degrees C over a layer of such a catalyst (20% of the tested coal mass) increased the light tar (boiling point <360 degrees C) yield by 10.1%, and the light tar fraction in the tar product to 75 wt % from 52 wt %. The corresponding increase in the molar ratio of H to C of the tar was 61.796. About 60% of the pitch in the original tar from coal pyrolysis was cracked in the catalytic upgrading. The contents of element N and S in the tar after catalytic cracking decreased by 50.5% and 45.8%, respectively. NH3 temperature-programmed desorption results revealed that there were weak Lewis and strong Bronsted acidic sites on the Ni-char catalyst, but many more Lewis acidic sites existed on the Ce-Ni-char catalyst. The addition of Ce into Ni-char facilitated the dispersion of nickel and increased the ability of the catalyst for inhibiting coke deposition.; Ni-char catalyst doped with different additives was used to catalytically upgrade coal pyrolysis tar in situ generated in a laboratory-scale dual-stage reactor. The additives including Fe, Mg, Ce, Zr were all beneficial to the catalytic activity for tar cracking. The best result of tar upgrading was achieved with Ce-Ni-char at a Ce-to-Ni molar ratio of 0.4. The upgrading test at 500 degrees C over a layer of such a catalyst (20% of the tested coal mass) increased the light tar (boiling point <360 degrees C) yield by 10.1%, and the light tar fraction in the tar product to 75 wt % from 52 wt %. The corresponding increase in the molar ratio of H to C of the tar was 61.796. About 60% of the pitch in the original tar from coal pyrolysis was cracked in the catalytic upgrading. The contents of element N and S in the tar after catalytic cracking decreased by 50.5% and 45.8%, respectively. NH3 temperature-programmed desorption results revealed that there were weak Lewis and strong Bronsted acidic sites on the Ni-char catalyst, but many more Lewis acidic sites existed on the Ce-Ni-char catalyst. The addition of Ce into Ni-char facilitated the dispersion of nickel and increased the ability of the catalyst for inhibiting coke deposition. |
Keyword | Volatile Matter Synthesis Gas Brown-coal Biomass Gasification Hydrocracking Performance Pressure Reactor |
Subtype | Article |
WOS Headings | Science & Technology ; Technology |
DOI | 10.1021/ef500927d |
URL | 查看原文 |
Indexed By | SCI |
Language | 英语 |
WOS Keyword | VOLATILE MATTER ; SYNTHESIS GAS ; BROWN-COAL ; BIOMASS ; GASIFICATION ; HYDROCRACKING ; PERFORMANCE ; PRESSURE ; REACTOR |
WOS Research Area | Energy & Fuels ; Engineering |
WOS Subject | Energy & Fuels ; Engineering, Chemical |
WOS ID | WOS:000340808800011 |
Citation statistics | |
Document Type | 期刊论文 |
Version | 出版稿 |
Identifier | http://ir.ipe.ac.cn/handle/122111/11393 |
Collection | 研究所(批量导入) |
Affiliation | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
Recommended Citation GB/T 7714 | Han, Jiangze,Liu, Xiaoxing,Yue, Junrong,et al. Catalytic Upgrading of in Situ Coal Pyrolysis Tar over Ni-Char Catalyst with Different Additives[J]. ENERGY & FUELS,2014,28(8):4934-4941. |
APA | Han, Jiangze,Liu, Xiaoxing,Yue, Junrong,Xi, Bingfeng,Gao, Shiqiu,&Xu, Guangwen.(2014).Catalytic Upgrading of in Situ Coal Pyrolysis Tar over Ni-Char Catalyst with Different Additives.ENERGY & FUELS,28(8),4934-4941. |
MLA | Han, Jiangze,et al."Catalytic Upgrading of in Situ Coal Pyrolysis Tar over Ni-Char Catalyst with Different Additives".ENERGY & FUELS 28.8(2014):4934-4941. |
Files in This Item: | ||||||
File Name/Size | DocType | Version | Access | License | ||
Catalytic Upgrading (2172KB) | 限制开放 | CC BY-NC-SA | Application Full Text |
Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Edit Comment