Experimental Investigations of Cold Flow Mass Distribution and PressureDrop Characteristics in a Structured Honeycomb Monolith Bed

摘要

The thermal flow reversal reactor (TFRR) and catalytic flow reversal reactor (CFRR) can utilize the ventilationair methane (VAM) from coal mines effectively. The initial cold feed flow mass distribution uniformity in the monolithoxidation bed, the critical part of both reactors, has a great influence on the stability of methane oxidation process andconversation rate. So the emphases are put on the experimental investigations of the cold flow mechanics in the monolithbed based on a simplified reactor test rig. Firstly, the flow resistance coefficients of the monolith bed were calculated, andthen the flow resistance mathematical model was built. It was found that the flow mass distribution uniformity wasaffected by the pressure drop distribution in the monolith bed, and obviously decreased with increasing inlet velocity. Thepressure drop distribution was analyzed through a modified momentum equation. The total pressure loss in the lowerheader was evidently higher than that in the upper header or monolith bed. Additionally, the local losses at the inlet andoutlet of the monolith bed were small, so they could be ignored. Finally, the formula of total pressure losses underdifferent flow conditions was established based on the simplified reactor test rig.