A flexible foil, gravity-driven mixer for preparation of gas mixtures

Abstract

A flexible foil mixer is described which is gravity driven and which assists in the preparation of gas mixtures of accurately known composition. This mixer, which is simple, inexpensive, and easy to construct, does not limit the operating temperature and pressure ranges of the containment vessel.

A re-entrant resonator for the measurement of phase boundaries: dew points for {0.4026CH4+0.5974C3H8}

“…The design of this circulating gas pump was based on those used for similar purpose and reported in [17][18][19][20][21]. The circulating pump, shown in figure 4, was formed from a cylinder and piston and was capable of operating at a pressure up to 40 MPa.…”

Second and Third Virial Coefficients for Methane + Ethane and Methane + Ethane + Carbon Dioxide at (300 and 320) K

“…2, 1996 where N ∞ is the zero-pressure cell constant while γ (A+B) and γ A are pressure distortion coefficients which are calculated from the physical properties of the construction material. Substituting eqs 5 and 6 into the virial equation of state produces where R ()8.314 471 J‚K -1 ‚mol -1 ) is the gas constant, M is the number of terms in the virial equation (Brugge et al, 1992), and B k is the kth virial coefficient (B 1 ) 1). The parameters B k , N ∞ , and F m were determined using a Burnett-isochoric reduction procedure applying the Britt and Leucke (1973) maximum-likelihood algorithm as developed by Embry (1980) and refined by Setzmann (1985).…”

“…Immediately after weighing, the components were mixed thoroughly using mixers located inside the cylinders. The mixer design is given in Brugge et al (1992).…”

A novel dynamic method for the storage of calibration gas mixtures based on thermal mass flow controllers

“…This aspect must be taken into account when using the gravimetric method. Technical solutions to face this problem have been proposed in the literature [13][14][15]. Natural convection is induced if the vessel is heated unevenly.…”