Date:

2025-04-30

Title of Paper:

Partial oxidative gasification of sewage sludge insupercritical water with multi-component catalyst

Journal:

Chemical Engineering Research and Design

Summary:

A new -Mn-Cu- mixture catalyst with components of 50.9 wt% CuMn2O4, 46.1 wt% CuOand 3.0 wt% Mn2O3was made by a co-precipitation method firstly. We adopted the multi-component catalyst together with activated carbon (AC) and Na2CO3(N) for the first timeto conduct supercritical water partial oxidative gasification (SWPO) of sewage sludge at450◦C, 25 MPa, 0.3 of oxidation coefficient and 5 h of residence time, so as to improve H2production and organics removal. The results show that MnO2-AC-N, CuO-AC-N and -Mn-Cu-AC-N could obviously improve H2yield and removal efficiency of organics in sewagesludge SWPO. At -Mn-Cu-AC-N conditions, H2yield and XCOD(removal efficiency of chemi-cal oxygen demand) were 202.4 mL/L and 95.6 wt%, much higher than 48.7 mL/L and 86.2 wt%obtained without catalyst, respectively. The -Mn-Cu-AC-N catalyst seemingly had the bestcatalytic effect on gas formation as well as on organics removal in sewage sludge SWPOamong MnO2-AC-N, CuO-AC-N and -Mn-Cu-AC-N. Potential catalytic reaction pathwayswere proposed as well.

Co-author:

Donghai Xu, Guike Lin, Zhijiang Ma, Yang Guo, Muhammad Umer Farooq

Volume:

2 4 ( 2 0 1 7 )

Page Number:

145–151

Translation or Not:

No

Date of Publication:

2017-06-13