钙基废弃物对生物质吸附增强式气化制氢特性的影响研究

Study of calcium-based waste on adsorption enhanced biomass gasification for hydrogen production

为了提高生物质气化制氢效率,综合利用工业固废资源,利用钙基废弃物——电石渣作为CO_(2)吸附剂,在两段式固定床上探究了钙基废弃物的添加量、反应温度对生物质气化制氢特性的影响,着重研究了吸附剂在实际应用中的循环吸附性能,并以此探讨了电石渣对生物质吸附增强气化的影响机制。结果表明,随着电石渣添加量的逐渐增加,H_(2)产量和含量都呈现出增加的趋势。而随着温度的升高,H_(2)产量和含量先增加后减小。当CaO/C物质的量比为1,重整段温度为700℃时,气体产物中的H_(2)产量和含量为154.34 mL/g(生物质)和26.76%,获得最大值。当电石渣循环次数小于5时,H_(2)的含量和产量相较于初次反应都有所增加。

In order to improve the efficiency of biomass gasification to hydrogen production,the comprehensive utilization of industrial solid waste resources,the use of calcium-based waste-calcium carbide slag as a CO_(2)adsorbent,experiments were carried out in a two-stage fixed bed to explore the effect of calcium-based waste addition,reaction temperature on the biomass gasification hydrogen production characteristics,focusing on the study of the adsorbent in practical applications of the cyclic adsorption performance,and thus discuss the influence mechanism of calcium carbide slag on biomass adsorption enhanced gasification.The results show that with the gradual increase of calcium carbide slag addition,H_(2)yield and concentration show an increasing trend.With the increase of temperature,the yield and concentration of H_(2)increase first and then decrease.When the CaO/C molar ratio is 1 and the temperature of the reforming section is 700℃,the yield and concentration of H_(2)in the gas product are 154.34 mL/g biomass and 26.76%,and the maximum value is obtained.When the number of calcium carbide slag cycles is less than 5,the concentration and yield of H_(2)increase compared to the initial reaction.