Improving supercritical water gasification of sludge by oil palm empty fruit bunch addition: Promotion of syngas production and heavy metal stabilization

Zhouchao Weng; Ekkachai Kanchanatip; Dwi Hantoko; Mi Yan; Hongcai Su; Sicheng Zhang; Guobin Wang

doi:10.1016/j.cjche.2019.08.004

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Improving supercritical water gasification of sludge by oil palm empty fruit bunch addition: Promotion of syngas production and heavy metal stabilization

Energy, Resources and Environmental Technology | Updated：2026-01-06

- Improving supercritical water gasification of sludge by oil palm empty fruit bunch addition: Promotion of syngas production and heavy metal stabilization
- Improving supercritical water gasification of sludge by oil palm empty fruit bunch addition: Promotion of syngas production and heavy metal stabilization
- 中国化学工程学报（英文版） 2020年28卷第1期页码：293-298
- Affiliations：
  
  1. Institute of Energy and Power Engineering, Zhejiang University of Technology,Hangzhou,China,310014
  2. Center of Excellence in Environmental Catalysis and Adsorption, Faculty of Engineering, Thammasat University, Pathumthani,Thailand,12120
  3. Department of Chemical Engineering, Institut Teknologi Bandung, Bandung,Indonesia,40132
- Author bio：
- Funds：
- DOI：10.1016/j.cjche.2019.08.004
  中图分类号：
- 纸质出版：2020
- Accepted：
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Zhouchao Weng, Ekkachai Kanchanatip, Dwi Hantoko, 等. Improving supercritical water gasification of sludge by oil palm empty fruit bunch addition: Promotion of syngas production and heavy metal stabilization[J]. 中国化学工程学报（英文版）, 2020,28(1):293-298.

Zhouchao Weng, Ekkachai Kanchanatip, Dwi Hantoko, Mi Yan, Hongcai Su, Sicheng Zhang, Guobin Wang. Improving supercritical water gasification of sludge by oil palm empty fruit bunch addition: Promotion of syngas production and heavy metal stabilization[J]. Chinese Journal of Chemical Engineering, 2020, 28(1): 293-298.
Zhouchao Weng, Ekkachai Kanchanatip, Dwi Hantoko, 等. Improving supercritical water gasification of sludge by oil palm empty fruit bunch addition: Promotion of syngas production and heavy metal stabilization[J]. 中国化学工程学报（英文版）, 2020,28(1):293-298. DOI： 10.1016/j.cjche.2019.08.004.

Zhouchao Weng, Ekkachai Kanchanatip, Dwi Hantoko, Mi Yan, Hongcai Su, Sicheng Zhang, Guobin Wang. Improving supercritical water gasification of sludge by oil palm empty fruit bunch addition: Promotion of syngas production and heavy metal stabilization[J]. Chinese Journal of Chemical Engineering, 2020, 28(1): 293-298. DOI： 10.1016/j.cjche.2019.08.004.

摘要

Abstract

The co-gasification of sewage sludge and palm oil empty fruit bunch (EFB) in supercritical water (SCW) was conducted at 400℃ with a pressure of over 25 MPa. This study aimed to investigate the influence of EFB addition on the syngas production and its composition. The heavy metal distribution and the leaching potential of the solid residue were also assessed. The results showed that syngas yield significantly increased with the addition of EFB into the feedstock. The cold gas efficiency (CGE) and carbon efficiency (CE) of co-gasification were higher than those of individual gasification. The actual syngas production from co-gasification of sludge and EFB was 45% higher than the theoretical total volume. The results indicated that the addition of EFB to sludge had the synergetic promotion effect on syngas production from sludge and EFB in supercritical water. This enhancement might be due to the dissolution of alkali metals from EFB and the adjustment of organic ratio. In addition

higher percentage of heavy metals were deposited and stabilized in the solid residue after SCWG. The leaching concentration of heavy metals from the solid residues was decreased to a level below the standard limit which enables it to be safely disposed of in landfill. In conclusion

the EFB addition has been proved to promote syngas production

as well as

stabilize the heavy metal in solid residues during co-SCWG.

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