Table 4.

Interphase Constituent Inventory for FCC Interphase Packing

Constituent	Volume Occupied	Moles in Interphase (moles)	Mass in Interphase (grams)
Core Protein (CP)	${\mathrm{\Phi }}_{\mathit{\text{CP}}}^{\text{max}}{V}_I^{\text{max}}=0.33V_I^{\text{max}}$	$\frac{0.33V_I^{\text{max}}{\rho }_P}{{\mathit{\text{MW}}}_P}$	$0.33V_I^{\text{max}}{\rho }_P$
Interphase Water (IW)	${\mathrm{\Phi }}_{\mathit{\text{IW}}}^{\text{max}}{V}_I^{\text{max}}=0.26V_I^{\text{max}}$	$\frac{0.26V_I^{\text{max}}{\rho }_W}{{\mathit{\text{MW}}}_W}$	$0.26V_I^{\text{max}}{\rho }_W$
Excluded Volume (EV)	${\mathrm{\Phi }}_{\mathit{\text{EV}}}^{\text{max}}{V}_I^{\text{max}}=0.41V_I^{\text{max}}$	$\frac{0.41V_I^{\text{max}}{\rho }_W}{{\mathit{\text{MW}}}_W}$	$0.41V_I^{\text{max}}{\rho }_W$

Notes: Φ^max = volume fraction at surface saturation producing the largest interphase volume $V_I^{\text{max}}$. ρ = density of water (w) or protein (p). MW = molecular weight of water (w) or protein (p). ρ_p = 1.3 g/cm³ corresponds to a perfectly spherical protein with core radius r_v = 6.72×10⁻⁸ MW^1/3 (see Appendix A, ref. [7]). ρ_W assumed to be 1 g/cm³.