New method for utilizing waste tire pyrolysis residue to prepare slurry fuel: Adsorption and slurry characteristics

Abstract Waste tire pyrolysis residue (WTPR) is a solid byproduct with high carbon content. Herein, WTPR was utilized in the preparation of WTPR water slurry (WTPRWS) to achieve resource utilization. Three dispersants (sodium ligninsulfonate [SL], hexadecyltrimethylammonium chloride [CTAC], and NP-40 substitute octylphenoxypolyethoxyethanol [NP-40]) were used in slurry preparation to improve the performance of WTPRWS. Results showed that the surface prpperties of WTPR had changed after dispersant adsorption through the analyses of FTIR, SEM–EDS, and XPS. The Langmuir equation was highly applicable for fitting the adsorption kinetics of the dispersants, and the adsorption quantity of NP40 was greater. NP40 exhibited better viscosity-reducing and stabilizing abilities in WTPRWS than the other dispersants. Meanwhile, shear-thinning characteristics were exhibited by all samples, especially the NP40 WTPRWS sample, which had the smallest yield stress. Moreover, the wetting properties and zeta potentials of WTPR before and after dispersant adsorption were analyzed.