ฉันรักแปลA cylindrical electric furnace surrounded the slightly titled stainless steel reactor; the temperature was then raised to 350 8C (at 5 8C/min) and steam, generated from a side device was introduced. This was followed by a slower temperature rise (50 8C/10 min) up to either 700–800 8C, to hold for limited durations. First sample (AC1) was prepared under concurrent flow of N2, passing though the boiling water in steam-generating device, at soak temperature of 700 8C. Second sample (AC2) was prepared by chemical treatment with 10% (w/v) calcium acetate at 700 8C after passing through N2. Third sample (AC3) was prepared by pure steam at 800 8C. The outlet tube was connected to a cooled condenser and trap to collect condensates, and a side tube to vent non-condensable gases.