Heterogeneous Phases Reaction Equilibrium in an Oxy-Thermal Carbide Furnace

Abstract

This work focuses on revealing the chemical reaction equilibrium behaviors of gas–liquid–solid heterogeneous phases in an oxy-thermal carbide furnace. From a CaC2 formation mechanism investigation, it was determined that a one-step mechanism occurs when there is an excess of C and a high CO partial pressure, which inhibits the formation of Ca in the system, and a two-step mechanism occurs when there is insufficient C and a low CO partial pressure, which promotes the formation of Ca. Based on the calculated results of the equilibrium compositions at 100 kPa and different temperature conditions, the chemical reaction equilibrium behaviors of gas–liquid–solid heterogeneous phases in an oxy-thermal carbide furnace were analyzed at conditions of excess C and insufficient C.

Towards Sustainable Carbon Return from Waste to Industry via C2-Type Molecular Unit

“…In addition to the well-established large-scale manufacturing of acetylene, carbide is also used directly, skipping gaseous acetylene, in many fundamental processes [ 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 ]. Currently, calcium carbide is a valuable product of the chemical industry and is produced from natural limestone and fossil carbon [ 52 , 53 , 54 , 55 , 56 , 57 , 58 ]. The initial reagents in the manufacturing of carbide remained the same until, in 2010, Zhang and co-authors presented a powerful approach based on biochars [ 59 ], which were obtained by pyrolysis of biomass and successfully used instead of mined carbon.…”