Abstract
In this study, fast microwave-assisted catalytic pyrolysis of sewage sludge was investigated for bio-oil production, with HZSM-5 as the catalyst. Pyrolysis temperature and catalyst to feed ratio were examined for their effects on bio-oil yield and composition. Experimental results showed that microwave is an effective heating method for sewage sludge pyrolysis. Temperature has great influence on the pyrolysis process. The maximum bio-oil yield and the lowest proportions of oxygen- and nitrogen-containing compounds in the bio-oil were obtained at 550. °C. The oil yield decreased when catalyst was used, but the proportions of oxygen- and nitrogen-containing compounds were significantly reduced when the catalyst to feed ratio increased from 1:1 to 2:1. Essential mineral elements were concentrated in the bio-char after pyrolysis, which could be used as a soil amendment in place of fertilizer. Results of XRD analyses demonstrated that HZSM-5 catalyst exhibited good stability during the microwave-assisted pyrolysis of sewage sludge.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 162-168 |
| Number of pages | 7 |
| Journal | Bioresource Technology |
| Volume | 172 |
| DOIs | |
| State | Published - Nov 1 2014 |
Bibliographical note
Publisher Copyright:© 2014 Elsevier Ltd.
Keywords
- Bio-oil
- Microwave
- Pyrolysis
- Sewage sludge
- Zeolite