1410 novel honeycomb monolith bed has a square cross section and is made of ceramic honeycomb monolith blocks. The heat exchange, flow reversal and methane oxidation of VAMMIT take place in the individual passages of honeycomb monolith blocks as illustrated in Figure 3 (a). This can significantly reduce the operational and maintenance costs such as power consumption, regenerative bed cleaning and shutdown time due to the elimination of dust deposition inside the bed. The specific heat transfer surface area for the VAMMIT is 880 m2/m3, which is significantly higher than 400-600 m2/m3 of a packed bed and much higher than 30-85 m2/m3 of a chequer brick bed. Hence, it is more compact and has a smaller footprint compared to other reactors. Figure 2. VAMCAT site trials with CNG and VAM at the Appin coal mine: (a) the whole test period and (b) the test period of 15:00-16:40 including full shaft speed (CNG1 refers to CNG being injected into startup burner while CNG2 refers to CNG being injected into the CMM mixer before the compressor).
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