Abstract
The possibility of utilizing technical pyrocarbon obtained as a result of pyrolysis of waste tires into composite suspension fuel was investigated. It was determined that the surface of unmodified pyrocarbon has a positive surface charge in the pH range of 2-10. The addition of humic acid causes a change in the surface charge of pyrocarbon and an overcharge of the surface. The influence of stabilizer additives on the rheological properties of composite suspension fuel based on pyrocarbon was studied. Carboxymethyl cellulose, OP-10, and humic acids were used as stabilizers. It is shown that the composite suspension fuel based on pyrocarbon has a synergistic effect of the addition of OP-10 with sodium humate to reduce the effective viscosity and fluidity of suspensions. A composite suspension fuel consisting of [0.5% C3 + 0.25% OP + 3% HA] at a solid phase concentration of 51.7% was proposed. The effective viscosity of the obtained suspensions does not exceed 0.9 Pa‧sec, and the sedimentation stability is 28-30 days. This allows us to recommend the obtained suspensions as liquid suspension fuel for liquid fuel units.
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