文献类型：期刊文献

英文题名：Strategic valorization of sewage sludge via modified HZSM-5 catalyzed hydrothermal carbonization: Optimized pyrolysis of derived hydrochar

作者：Rizwan, Muhammad[1];Zhou, Xiaolong[1];Leghari, Asma[2];Kashif Javed, Muhammad[1];Asif Nawaz, Muhammad[3];Mansoor, Adil[4];Song, Yueqin[1];Hassan, Abdullah[1];Ullah, Saif[1]

机构：[1]East China Univ Sci & Technol, Int Joint Res Ctr Green Energy & Chem Ind, Sch Chem Engn & Technol, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Inst Clean Coal Technol, Shanghai, Peoples R China;[3]Univ Seville, Inst Seville, Dept Inorgan Chem & Mat Sci, CSIC, Seville, Spain;[4]Shenzhen Univ, Coll Phys & Optoelect Engn, Shenzhen, Peoples R China

年份：2026

卷号：23

期号：2

起止页码：316

外文期刊名：INTERNATIONAL JOURNAL OF GREEN ENERGY

收录：;EI(收录号：20253919223473);WOS:【SCI-EXPANDED(收录号:WOS:001570325300001)】；

基金：This research was sponsored by the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Waste management; hydrothermal carbonization; sewage sludge; HZSM-5; pyrolysis; green energy; syngas

摘要：The global waste management crisis requires innovative valorization techniques to handle various complex waste streams. This study advances an innovative catalyst-mediated hydrothermal carbonization (HTC) process of sewage sludge (SS), followed by strategic pyrolysis (Py) of derived hydrochar (HC) into valuable energy carriers. At concentrations ranging from 1-7 wt.% for the modified HZSM-5 catalysts Pt/H2SO4/HZSM-5 (X) and H2SO4/HZSM-5 (Y), a comprehensive analysis of derived catalyzed HC was performed. XPS analysis indicated that the HC-X7 (7% loading of X) attained superior carbon (C) functionality, exhibiting 64.37% C-C bonds and an increased C content of 51.75%, thereby demonstrating improved aromatization efficiency compared to Y-based HC. Thermogravimetric profiles revealed distinct decomposition stages (56 degrees C-800 degrees C), with X-based HC demonstrating regulated degradation pathways characterized by well-defined DTG peaks. Temperature-dependent pyrolysis (500 degrees C-900 degrees C) of catalyzed HC yielded syngas rich in H-2 with a H-2/CO ratio of 0.57 at 900 degrees C, while 700 degrees C resulted in the maximum production of aromatic compounds with minimal oxygenated species. At 500 degrees C, HC-X7 achieved exceptional H-2 yields (63.85 vol%), and at 900 degrees C, the highest CO production (57.79 vol%), respectively, enabling precise control of the H-2/CO ratio. The X catalyst promoted selective hydrogenation pathways to inhibit the formation of polyaromatic hydrocarbons successfully. This integrated HTC-pyrolysis pathway transforms problematic waste into clean energy carriers, balancing an eco-friendly environment.