Regenerating mercurous chloride-loaded porous carbon complex through steam-induced thermal activation

Jian Liu, Chandrasekar Srinivasa Kannan, Libo Zhang, Chenhui Liu, Song Cheng, Chao Liu

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

In the present study, the spent mercurous chloride catalyst (coal carbon base) used in the PVC production process was regenerated to separate the Mercury to recover the porous carbon for possible reuse in other applications. The effect on regeneration temperature and the regeneration duration was assessed on the Mercury removal capacity using various physicochemical characterization techniques, such as FT-IR, XPS, SEM, BET, and Raman spectroscopy. The optimal regeneration conditions were determined to enhance the yield and the methylene blue number. The optimal conditions were found to be a temperature of 900 °C and an activation duration of 1.5 h. All the regeneration experiments were conducted at a nitrogen flow of 100 L h-1 and water vapor flow of 30 L h-1. The methylene blue adsorption capacity of the regenerated carbon was found to be 173 mg g-1, with near 99% recovery of mercury and with the yield of carbon being 88.42%. The work proves that both mercury removal and carbon regeneration can be significantly improved by purging the system with a nitrogen-water vapor flow at the optimal condition.

Original languageBritish English
Article number095601
JournalMaterials Research Express
Volume5
Issue number9
DOIs
StatePublished - Sep 2018

Keywords

  • mercury removal
  • nitrogen-water vapor
  • regeneration
  • synchronize

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