不同气化剂下海藻粉在气流床下气化特性试验研究

为考察O2/水蒸气和O2/CO2作为气化剂对海藻粉气化特性的影响,在自制的小型生物质气流床气化炉上开展海藻粉在气流床下气化特性试验研究。当氧气/生物质比（O/B）为0.3、气化温度为1200℃时,不同水蒸气/生物质比（S/B=0～1.2）对合成气组成有较大影响,其中H2产量的上升趋势最为明显,S/B=1.2时比单纯氧气气化提高了81.4%。而在O2/CO2气化条件下,由生物质产生的CO2随二氧化碳/生物质比（CO2/B）的增加而下降,当CO2/B=0.9时,H2、CO的产量分别比单纯氧气气化提高了33.9%和75.8%,热值由5521 kJ/m3上升至8576 kJ/m3。结果表明,如果以提高热值为制取合成气的目标时,添加CO2在一定范围内可以达到水蒸气的效果,同时降低了系统能耗及简化了气化设备。

Experimental study on the effect of different gasification agents on seaweed powder gasification in an entrained flow gasifier

The influences of O2/CO2 and O2/Steam as different gasification agents on the characteristics of seaweed powder gasification in a bench-scale entrained flow gasifier were studied.Different ratios of steam/biomass had effects on the gas composition： H2 content increased obviously,which were improved by 81.4% with S/B=1.2.The content of CO2 produced from biomass was reduced with the increasing of the ratio of CO2/biomass.Compared with oxygen gasification,H2 and CO contents were improved by 33.9% and 75.8% respectively.The heating value increased from 5521 kJ/m3 to 8576 kJ/m3.The results indicated that the addition of CO2 can achieve the effect of steam to some extent aimed at the heating value of syngas,while reducing the energy consumption and simplifying the gasification equipments.