dc.contributor.author | AKUETTEH, TEKAI | |
dc.date.accessioned | 2013-08-13T14:28:12Z | |
dc.date.available | 2013-08-13T14:28:12Z | |
dc.date.issued | 2013-08-13 | |
dc.identifier.uri | http://hdl.handle.net/10222/35319 | |
dc.description.abstract | This work explored the viability of two solid adsorbents, limestone and cement powder, for use in a flow-through packed-bed column for HCl and HF gas neutralization following refrigerant destruction. Neutralization tests performed at 408 K using 5% HCl in N2 and 5% HF in N2, showed that limestone had a significantly higher adsorption capacity for both HF & HCl, future tests therefore utilized limestone only. The results showed that ~49% of the fed HCl and between 7.8% - 16.2% of the fed HF gases were adsorbed by 0.007 kg of limestone for a 6.67×10-6 m3/s (STP) flow rate over 30 – 180 minutes. Applying the shrinking core model, effective diffusivities (De) of HCl & HF into the limestone particles were 1.5×10-9 & 2.2×10-9 m2/s respectively. Under these conditions, complete particle conversion times were 227 hours for HCl–limestone and 154 hours for HF–limestone. Estimating De values at plasma-reactor temperatures gave 5.61x10-9 m2/s & 8.24x10-9 m2/s for HCl–limestone and HF–limestone respectively. Correspondingly, particle consumption times were reduced to 61 and 41 hours for HCl–limestone and HF–limestone. Considering the conversion times for the 1 mm particle sizes, shorter conversion times would require micron-scale particle sizes, suitable for entrained flow but not for a packed-bed arrangement. | en_US |
dc.language.iso | en | en_US |
dc.subject | Gas-solid adsorption, shrinking core model, HF, HCl, effective diffusivity | en_US |
dc.title | SOLID ADSORPTION MEDIA FOR HF & HCl FOLLOWING REFRIGERANT DESTRUCTION | en_US |
dc.date.defence | 2013-08-02 | |
dc.contributor.department | Department of Process Engineering and Applied Science | en_US |
dc.contributor.degree | Master of Applied Science | en_US |
dc.contributor.external-examiner | DR MARK GIBSON | en_US |
dc.contributor.graduate-coordinator | DR MARK GIBSON | en_US |
dc.contributor.thesis-reader | DR STEPHEN KUZAK | en_US |
dc.contributor.thesis-supervisor | DR MICHAEL PEGG, DR ADAM DONALDSON | en_US |
dc.contributor.ethics-approval | Not Applicable | en_US |
dc.contributor.manuscripts | Not Applicable | en_US |
dc.contributor.copyright-release | Not Applicable | en_US |