文献类型：期刊文献

英文题名：Ferric sludge derived pyrolyzed-hydrochar supported iron catalysts for catalytic cracking of toluene

作者：Xiao, Yao[1,2];Ding, Lu[1,2,3];Leghari, Asma[1,2];Hungwe, Douglas[4];Gao, Ming[1,2];Gao, Yunfei[1,2];Zhang, Yayun[5];Chen, Xueli[1,2];Wang, Fuchen[1,2]

机构：[1]East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai 200237, Peoples R China;[2]Minist Educ, Engn Res Ctr Resource Utilizat Carbon containing W, Shanghai 200237, Peoples R China;[3]Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China;[4]Hosei Univ, Res & Dev Ctr, 4342 Aihara,Tama Campus, Tokyo 1940298, Japan;[5]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2024

卷号：491

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20241916069267);WOS:【SCI-EXPANDED(收录号:WOS:001237305700001)】；

基金：This work was supported by the National Natural Science Foundation of China (22278142) . The authors would like to thank Shiyanjia Lab ( www.shiyanjia.com ) for the characterization of the catalyst. The authors would also like to thank teacher Ji-wu Cao ( www.ceshihui.cn) for the X-ray absorption spectra test and data analysis. It is also supported by the social development science and technology tackling roject of 2021 "Scientific and Innovative Action Plan of Shanghai" (21DZ1209000) ", and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Ferric sludge; Pyrolyzed-hydrochar catalyst; Hydrothermal carbonization; Toluene catalytic cracking; Carbon deposits

摘要：Effective treatment of ferric sludge in an eco-friendly method is key to the feasibility of Fenton technology in pollution treatment, contributing to the realization of the "dual-carbon" strategic objectives. In this study, Fe-loaded pyrolyzed-hydrochar catalysts were prepared using simple one-pot hydrothermal carbonization (HTC) method with ferric sludge as the precursor, which greatly reduced the energy and time consumption on the preparation of the sludge derived catalyst. At 800 degrees C with a reaction time of 20 min, all catalysts showed high toluene removal performance (>60 %) and produced H-2-rich syngas (H-2 > 90 %). In particular, the catalyst prepared by HNO3-assisted HTC (HNC) presented the highest toluene removal efficiency and H-2 yield, 77.52 +/- 3.36 % and 11.12 +/- 0.66 mol%, respectively. Additionally, the sources of carbon deposits and the interaction between the active site and carbon deposits were analyzed in detail by DFT to reveal the catalytic activity and deactivation mechanism of catalyst. The results showed that the adsorption energy of C generated from methyl on different Fe phases was lowest (the adsorption energy of C was -8.79 eV for Fe, -5.28 eV for Fe2O3, and -4.70 eV for Fe3O4), suggesting that the adsorption of C on catalyst was the main reason for the formation of carbon deposits. The lowest adsorption energy of the metallic Fe phase for C indicated that Fe-0 was coated by carbon deposits during toluene catalytic cracking, which hampered catalytic activity. These results are of great significance for optimizing the preparation of Fe-loaded carbonaceous catalysts and the regulation of Fe active phase.