Evaluation of sulphonated acetone–formaldehyde (SAF) used in coal water slurries prepared from different coals

• Published in: Fuel (Guildford) Vol. 86; no. 10; pp. 1439 - 1445
• Main Authors: Qiu, Xueqing, Zhou, Mingsong, Yang, Dongjie, Lou, Hongming, Ouyang, Xinping, Pang, Yuxia
• Format: Journal Article
• Language: English
• Published: Oxford Elsevier Ltd 01-07-2007; Elsevier
• Subjects: Alternative fuels. Production and utilization; Applied sciences; Coal water slurry; Energy; Exact sciences and technology; Fuel slurries; Fuels; Sulphonated acetone–formaldehyde; Viscosity-reducing capacity; Asia; China; Coal water slurry; Sulphonated acetone–formaldehyde; Viscosity-reducing capacity; Stability; Sulphonated acetone-formaldehyde; Coal water mixture; Dispersant; Resins; Formaldehyde; Apparent viscosity; Acetone
• ISSN: 0016-2361; 1873-7153
• DOI: 10.1016/j.fuel.2006.11.035

A new type of water-soluble polymer, sulphonated acetone–formaldehyde resin (SAF), was developed as dispersant for the preparation of highly-loaded coal water slurry (CWS). In this study, in order to evaluate the practical use in industry, the SAF and a naphthalene sulfonate formaldehyde condensate are used to prepare CWS using four Chinese coals with different coalification degrees. The evaluation of the properties of CWS shows that SAF has better ability in reducing CWS viscosity at lower dosage than naphthalene sulfonate formaldehyde condensate, and that the CWS prepared from SAF has excellent stability within 48
h and exhibits shear-thinning apparent viscosity/shear rate behavior at lower dosage. Based on the results, the SAF is an effective and promising dispersant for highly-loaded CWS.