Study and development of a high temperature process of multi-reformation of CH4 with CO2 for remediation of greenhouse gas

A new carbon capture and recycle (CCR) system based on multi-reforming of CH4 with CO2 is proposed in this study. The aim was to develop a novel method to remediate greenhouse gases (CO2) using a high temperature (over 1173 K) process of reforming CH4 and/or O2, and/or H2O without catalysts. Using this novel method, the reactants are individually preheated to over 1173 K using a ceramic honeycomb heat exchanger, and then these high temperature streams enter the reactor to start the reforming reactions. Both thermodynamic and experimental studies were carried out on this novel method. Thermodynamic equilibrium models were built for four types of reforming, including dry reforming, bi-reforming, auto-thermal reforming, and tri-reforming. Only dry reforming was experimentally tested. The feasibility of this novel technology was proven by simulated and experimental results. High temperatures significantly promoted the multi-reforming process while avoiding the problem of catalyst deactivation. The experimental results on the direct system also showed that potential improvements in the efficiency of the novel technology could be achieved by optimizing the reforming reactants. Therefore, a continuous system was proposed. Moreover, the power source for the application of CCR systems was also discussed.

► A novel system based on high temperature multi-reforming of CH4 with CO2 is proposed for remediation of greenhouse gas.
► Effect of temperature and pressure is studied through thermodynamic analysis, and at high temperature, considerable results could be achieved.
► The process without catalysts is carried out on a facility, which could realize high temperature. Good performance results were obtained.
► The power source for the system is discussed. The systems based on nuclear reactor and biomass gasification are presented respectively.