The effect of acid-base synergistic catalysis on upgrading of volatiles from coal pyrolysis over Mg-Al composite oxides
文献类型：期刊论文
| 作者 | Yang, Hang1,2; Zhang, Jiehan1; Li, Changming3; Chen, Zhaohui1; Wang, Demin1; Wang, Deliang1; Sharif, Munnir Ibrahim1,2; Li, Jianling1; Yu, Jian1; Gao, Shiqiu1 |
| 刊名 | FUEL
 |
| 出版日期 | 2022-08-01 |
| 卷号 | 321页码:10 |
| ISSN号 | 0016-2361 |
| 关键词 | Coal pyrolysis Catalytic upgrading Hydrotalcites Acid-base synergy |
| DOI | 10.1016/j.fuel.2022.124030 |
| 英文摘要 | Catalytic upgrading of coal pyrolysis volatiles is one of the most promising technical routes to achieve graded utilization of low-rank coal resource. In this work, a series of Mg-Al composite oxide catalysts (MgxAl-LDOs) were synthesized with tunable acid-base properties for upgrading the volatiles from coal pyrolysis by adjusting the Mg/Al ratio in Mg-Al hydrotalcite precursors (MgxAl-LDHs). The NH3-TPD and CO2-TPD analysis results showed the quantity of acidity sites decrease together with an increase of basicity sites as the Mg/Al ratio increased in MgxAl-LDOs. MgxAl-LDOs possessed weaker acidity strength and more acidity sites than pure Al2O3, but less basicity sites than pure MgO. The catalytic performances illustrated that the increased acidity sites in MgxAlLDOs promoted the cracking of heavy components and reduced the yield of heavy tar. Meanwhile, the weakened acidity strength and the introduction of basicity sites by Mg in MgxAl-LDOs enhanced the strong resistance to carbon deposition. Moreover, the CO2 yield and the content of light aromatic hydrocarbons in tar increased obviously after upgrading, which can be attributed to the acid-base synergistic effect of the MgxAl-LDOs. Particularly, the Mg4Al-LDO catalyst selectively improved the relative contents of light aromatic hydrocarbons, and the content of benzene, toluene, ethylbenzene, xylene, naphthalene and indene increased by 1.48, 1.54, 0.76, 2.56, 0.19 and 2.14 times (compared with the inert quartz sand), respectively. The unique catalytic behaviors of MgxAl-LDO catalysts will provide a new insight into the effect of acid-base synergistic catalysis on upgrading of volatiles from coal pyrolysis. |
| WOS关键词 | LAYERED DOUBLE HYDROXIDES ; LIGHT AROMATIC-HYDROCARBONS ; LOW-RANK COAL ; SELECTIVE HYDROGENATION ; METAL-OXIDES ; RED MUD ; NI ; CRACKING ; TAR ; ZEOLITE |
| 资助项目 | National Natural Science Foundation of China[21878310] ; Beijing Natural Science Foundation[8222042] |
| WOS研究方向 | Energy & Fuels ; Engineering |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| WOS记录号 | WOS:000803687500002 |
| 资助机构 | National Natural Science Foundation of China ; Beijing Natural Science Foundation |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/53558]  |
| 专题 | 中国科学院过程工程研究所 |
| 通讯作者 | Li, Changming; Gao, Shiqiu |
| 作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Sch Chem Engn, Beijing 100049, Peoples R China 3.Beijing Technol & Business Univ, Sch Ecol & Environm, State Environm Protect Key Lab Food Chain Pollut, Beijing 100048, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Hang,Zhang, Jiehan,Li, Changming,et al. The effect of acid-base synergistic catalysis on upgrading of volatiles from coal pyrolysis over Mg-Al composite oxides[J]. FUEL,2022,321:10. |
| APA | Yang, Hang.,Zhang, Jiehan.,Li, Changming.,Chen, Zhaohui.,Wang, Demin.,...&Gao, Shiqiu.(2022).The effect of acid-base synergistic catalysis on upgrading of volatiles from coal pyrolysis over Mg-Al composite oxides.FUEL,321,10. |
| MLA | Yang, Hang,et al."The effect of acid-base synergistic catalysis on upgrading of volatiles from coal pyrolysis over Mg-Al composite oxides".FUEL 321(2022):10. |
入库方式： OAI收割
来源：过程工程研究所
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