生物质能源开发——Ⅲ.甘蔗渣的湿式裂解气化

Development of Energy from Biomass——Ⅲ. Catalytic Pyrolysis of Bagasse in Aqueous Sulution

对文题内容研究表明,Na_2CO_3对生物质的湿式裂解是良好的催化剂。Ni-Mo催化剂有利于甲烷生成,Ni-Mo和Na_2CO_3混合催化剂效果最好。可使气体转化率达55%以上。生物质的湿式裂解气化可得气体、液体和焦三种产品。其中气体产品主要含CO_2、CO、H_2、CH_4和少量的C_mH_n。脱(?)CO_2后可得热值为12500～16700kJ/m^3左右的中热值煤气。对液体产品的组分用荧光光谱法进行了分析,发现有菲、(?)醌等几十种物质。湿式裂解气化的最佳反应时间为150min、反应温度380℃以上。若以液体产品为主,则反应时间为80min较佳,反应温度相对降低。讨论了不同催化剂及Na_2CO_3用量对甘蔗渣湿式裂解气化的影响。

It is shown that Na_2CO_3 is a good catalyst for the pyrolysis, Ni-Mo is better for producing methane, and the mixed catalyst of Na_2CO_3 and Ni-Mo is the most efficient for gasification with amount of gas produced reaching 55%. Products of gas, liquid,and char are obtained. The main components of gas produced are CO_2, CO, H_2, CH_4 and a little C_mH_n. The heating value of the gas from which CO_2 was removed is medium, about 12 500～16 700 kJ/m^3. The components of liquid products are determined by fluorescence spectroscopy. More than 30 components such as phenathrene and anthraquinone, are found. The effects of reaction temperature, amount of catalyst Na_2CO_3 used and reaction time on conversion yield of bagasse are investigated.