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| 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. |
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| File Name/Size | DocType | Version | Access | License | ||
| Catalytic Upgrading （2172KB） | 限制开放 | CC BY-NC-SA | Application Full Text | |||
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