Abstract: A process for reducing the size of asphaltene particles in heavy fuel oils, rendering the fuel oils more suitable for clean combustion. The process includes the steps of passing the fuel oil through a plurality of zones within a conduit, with each zone having shearing elements.

Abstract: A static, flow-conditioner apparatus comprising a series of closely spaced shearing edges which contact and condition liquid flowing thereby. The edges are advantageously carried on propellor-shaped articles and mounted on an axial shaft in conduit forming a confined liquid flow space. It is advantageous to modify flow patterns by changes in edge configuration and flow patterns within spaces between closely packed group of the shearing edge-bearing members. Particularly, utility is found in reducing the asphaltene "particles" or "globules" in heavy fuel oil to extremely small size so they are readily burned in a boiler with reduced particulates in the stack effluent.