Waste Minimization Protocols for the Process of Synthesizing Zeolites from South African Coal Fly Ash
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منابع مشابه
Waste Minimization Protocols for the Process of Synthesizing Zeolites from South African Coal Fly Ash
Production of a high value zeolite from fly ash has been shown to be an avenue for the utilization of South African fly ash which presently constitutes a huge disposal problem. The synthesis of zeolites Na-P1 and analcime on a micro-scale has been successful and preliminary investigation shows that scale-up synthesis is promising. However, the post-synthesis supernatant waste generated contains...
متن کاملDistributional Fate of Elements during the Synthesis of Zeolites from South African Coal Fly Ash
The synthesis of zeolites from South African coal fly ash has been deemed a viable solution to the growing economical strain caused by the disposal of ash in the country. Two synthesis routes have been studied thus far namely the 2-step method and the fusion assisted process. Fly ash contains several elements originating from coal which is incorporated in the ash during combustion. It is vital ...
متن کاملSynthesis of Zeolites Na-P1 from South African Coal Fly Ash: Effect of Impeller Design and Agitation
South African fly ash has been shown to be a useful feedstock for the synthesis of some zeolites. The present study focuses on the effect of impeller design and agitation rates on the synthesis of zeolite Na-P1 which are critical to the commercialization of this product. The effects of three impeller designs (4-flat blade, Anchor and Archimedes screw impellers) and three agitation speeds (150, ...
متن کاملUtilization of zeolites synthesized from coal fly ash for the purification of acid mine waters.
Two pilot plant products containing 65 and 45% NaP1 zeolite were obtained from two Spanish coal fly ashes (Narcea and Teruel Power Station, respectively). The zeolitic product obtained showed a cation exchange capacity (CEC) of 2.7 and 2.0 mequiv/g, respectively. Decontamination tests of three acid mine waters from southwestern Spain were carried out using the zeolite derived from fly ash and c...
متن کاملDirect synthesis of carbon nanofibers from South African coal fly ash
Carbon nanofibers (CNFs), cylindrical nanostructures containing graphene, were synthesized directly from South African fly ash (a waste product formed during the combustion of coal). The CNFs (as well as other carbonaceous materials like carbon nanotubes (CNTs)) were produced by the catalytic chemical vapour deposition method (CCVD) in the presence of acetylene gas at temperatures ranging from ...
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ژورنال
عنوان ژورنال: Materials
سال: 2013
ISSN: 1996-1944
DOI: 10.3390/ma6051688