A diffuser is disclosed and includes a channel with an inner portion having an inlet and an outlet through which a gaseous substance enters and exits the diffuser, respectively. The inner portion includes a first conical section that has an increasing cross-sectional area, taken along a plane perpendicular to a central axis, in a first direction. The inner portion also includes a second conical section that has a decreasing cross-sectional area, taken along a plane perpendicular to the central axis, in the first direction. The second conical section is communicatively coupled with the first conical section. The outer portion includes a first annular section that has an increasing cross-sectional area, taken along a plane perpendicular to the central axis, in a second direction opposite the first direction. The diffuser further includes a plurality of orifices that communicatively couple the second conical section with the first annular section.