Production of value-added hydrochar from single-mode microwave hydrothermal carbonization of oil palm waste for de-chlorination of domestic water

Peter Nai Yuh Yek, Rock Keey Liew, Wan Adibah Wan Mahari, Wanxi Peng, Christian Sonne, Sieng Huat Kong, Meisam Tabatabaei, Mortaza Aghbashlo, Young Kwon Park, Su Shiung Lam

Research output: Contribution to journalArticlepeer-review

20 Scopus citations

Abstract

A huge amount of palm waste generated daily represents a problematic high-moisture waste to be disposed of, yet it also represents a promising biomass resource to be transformed into a value-added product. A single-mode microwave hydrothermal carbonization process incorporating steam purging was developed and utilised to convert high-moisture palm waste into hydrochar over a range of process temperatures from 150 to 300 °C. The microwave hydrothermal carbonization recorded a shorter process duration (10 min) and prevented the occurrence of hot spots within the reactor. The resulting hydrochar showed up to 94.3 wt% of mass yield, 69.2 wt% of fixed carbon, and 412.3 m2/g of surface area. The subsequent application of the hydrochar in de-chlorination of domestic water demonstrated an impressive removal performance of up to 98.9% of free chlorine, exhibiting 435 min of breakthrough time, and 40.0 mg/g of bed capacity in continuous column operation. The results show great promise of microwave hydrothermal carbonization as a desirable approach to produce desirable hydrochar for de-chlorination application.

Original languageEnglish
Article number154968
JournalScience of the Total Environment
Volume833
DOIs
StatePublished - 10 Aug 2022

Keywords

  • Biomass
  • De-chlorination
  • Hydrochar
  • Hydrothermal
  • Microwave

Fingerprint

Dive into the research topics of 'Production of value-added hydrochar from single-mode microwave hydrothermal carbonization of oil palm waste for de-chlorination of domestic water'. Together they form a unique fingerprint.

Cite this