Continuous Phenol Removal Using a Liquid–Solid Circulating Fluidized Bed

Energies

Rambabu Krishnamoorthy¹  Murugesan Thanapalan²  PauLoke Show³  Faheem Ahmed⁴  Nirmala Gnanasundaram⁵  Nandhini Sureshkumar⁵  Samiha Bhat⁵  Shwetha Srinivasan⁵  Hatem Abuhimd⁶ 

[1] Department of Chemical Engineering, Khalifa University, Abu Dhabi 127788, UAE;Department of Chemical Engineering, Universiti Tecknologi Petronas, Perak 32610, Malaysia;Department of Chemical and Environmental Engineering, Faculty of Science and Engineering, University of Nottingham Malaysia, Selangor 43500, Malaysia;Department of Physics, College of Science, King Faisal University, P.O. Box-400, Al-Ahsa 31982, Saudi Arabia;Mass Transfer Lab, School of Chemical Engineering, Vellore Institute of Technology, Vellore 632014, India;National Center for Nanotechnology and Semiconductor, King Abdulaziz City for Science and Technology, Riyadh 11564, Saudi Arabia;

关键词: circulating fluidized bed;    adsorption;    activated carbon;    phenol;    glass beads;   

DOI  :  10.3390/en13153839

来源: DOAJ

【 摘 要 】

A liquid-solid circulating fluidized bed (LSCFB) helps to overcome the shortcomings of conventional fluidized beds by using a particle separation and return system as an integral part of the overall reactor configuration. Batch adsorption experiments were carried out for the removal of phenol from a synthetically prepared solution using fresh activated-carbon-coated glass beads. The morphological features and surface chemistry of the adsorbent were analyzed via SEM and FTIR techniques. The adsorbent dosage, contact time and temperature were varied along with solution pH to assess their effects on the adsorbent performance for phenol removal. Isotherm modeling showed that the phenol removal using the activated-carbon glass beads followed the Langmuir model. Effectively, it was observed at an adsorbent loading of 2.5 g/150 mL of feed volume and a contact time of 3 h produced an 80% efficiency in the batch study. Furthermore, on scaling it up to the column, the desired 98% phenol-removal efficiency was obtained with an adsorbent dosage of 250 g and contact time of 25 min. Adsorbent regeneration using 5% (v/v) ethanol showed a 64% desorption of phenol from the sorbent within 20 min in the LSCFB.

【 授权许可】

Unknown