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在氧气气氛下对铜渣进行煅烧,通过XRD,H2-TPR,BET和SEM手段系统地分析了煅烧温度、时间及铜渣粒径对煅烧后铜渣表面形貌、晶体结构、元素Fe存在形态的影响,并通过自建实验台进行气化实验考察煅烧对铜渣催化生物质气化活性的影响.结果表明,煅烧使Fe从铁橄榄石中脱离出来以Fe3O4和Fe2O3的形式存在,随煅烧温度升高、时间延长、铜渣粒径变小,铜渣内Fe3O4峰先增强后变弱,Fe2O3峰不断增强.气化实验结果表明,预煅烧后铜渣催化生物质气化产气中H2量由19.61%增至21.35%,CO量由32.55%增至36.89%,由此推断Fe3O4和Fe2O3的形成是预煅烧铜渣催化活性提高的原因.
The copper slag was calcined under oxygen atmosphere. The surface morphology, crystal structure and the existence of elemental Fe of calcined copper slag were systematically analyzed by XRD, H2-TPR, BET and SEM. The influence of calcination on gasification activity of copper slag catalytic biomass was investigated by self-built test bench.The results showed that Fe was separated from fayalite by Fe3O4 and Fe2O3 and calcined When the temperature is increased and the time prolongs, the particle size of the copper slag becomes smaller, the Fe3O4 peak in the copper slag first increases and then becomes weaker, and the peak of Fe2O3 keeps increasing. The results of the gasification experiment show that after the pre-calcination, The amount of CO increases from 19.61% to 21.35% and the amount of CO increases from 32.55% to 36.89%. Therefore, it is inferred that the formation of Fe3O4 and Fe2O3 is the reason for the increase of catalytic activity of pre-calcined copper slag.