کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6473772 | 1424964 | 2017 | 9 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Synthesis and evaluation of a novel dispersant with jellyfish-like 3D structure for preparing coal-water slury Synthesis and evaluation of a novel dispersant with jellyfish-like 3D structure for preparing coal-water slury](/preview/png/6473772.png)
- A novel dispersant for coal-water slurry, TAA, was developed and characterized.
- TAA was synthesized by grafting copolymerization of tannic acid and acrylic acid.
- TAA presents in CWS as a unique jellyfish-like 3D structure.
- TAA demonstrates superior slurry-making performance compared to SDS and PSS.
- Made with renewable resources and S/N-free, TAA is environmentally friendly.
TAA, a new dispersant for making coal-water slurry (CWS), has been synthesized by grafting copolymerization of oxidized tannic acid (TA) and acrylic acid (AA). 1H NMR and FTIR tests revealed that TAA has a unique jellyfish-like 3D molecular structure, in agreement with experimental evidences from contact angle and zeta potential measurements. The surfactivity of TAA in aqueous solution was characterized using a surface-tension meter. The rheological properties and static stability of CWS containing 66Â wt.% coal with 0.3Â wt.% TAA dosage were examined and compared with slurries prepared with two commercial dispersants, i.e. sodium dodecyl sulfate (SDS) and sodium polystyrene sulfonate (PSS). TAA showed excellent slurry-making performance due to its special 3D structure, with polar and non-polar sites in the bottom plane exhibiting affinity to those on the coal particle surfaces to build strong interactions. CWS prepared with TAA showed good stability and favorable rheological properties compared with slurries prepared with SDS and PSS. The present work provides a new approach to the development of high-performance and environmentally friendly S/N-free dispersants from renewable resources.
Journal: Fuel - Volume 200, 15 July 2017, Pages 458-466