Adjustment of biomass product gas to raise H2/CO ratio and remove tar over sodium titanate catalysts
Adjustment of biomass product gas to raise H2/CO ratio and remove tar over sodium titanate catalysts
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钛酸钠催化剂调节生物质产气提高H2/CO比脱焦油
DOI：
10.1016/j.renene.2017.08.025
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发表时间：
2018
期刊：
影响因子：
8.7
通讯作者：
Wu Chuangzhi
中科院分区：
文献类型：
--
作者：
Yuan Hongyou;Wu Shubin;Yin Xiuli;Huang Yanqin;Guo Daliang;Wu Chuangzhi
为了提高H2/CO和脱除生物质产品气中的焦油，用0.3 kg/h螺杆热解炉产生的木粉热解气在850℃下对钛酸钠4Na2O·5TiO2和Na2O·3TiO2进行了评价，并选择硅砂作为惰性材料进行了比较。运行的GHSV约为2000h−1，焦油含量约为200g/Nm~3。结果表明，4Na2O·5TiO2的活性最高，Na2O·3TiO2的活性稍低，而石英砂没有提高氢气产率的活性。焦油裂解、水煤气变换和/或甲烷重整促进了氢气的生成。H2/CO增加到1.8~2.0，高于石英砂(约0.35)和原料气(约0.25)。在4Na2O·5TiO2重整过程中，焦油转化率约为99%，在8h左右几乎没有结焦，而石英砂在1h内结焦明显，除部分二甲苯、萘、联苯和菲外，大部分焦油组分都能得到有效重整。在长期实验中，4Na2O·5TiO2的活性因钠的释放而逐渐降低，并有向Na2O·3TiO2转化的趋势，后者表现出良好的稳定性和活性。
To raise H2/CO and remove tar for biomass product gas, sodium titanates 4Na2O·5TiO2and Na2O·3TiO2were evaluated at 850 °C using wood powder pyrolysis gas produced from a 0.3 kg/h screw pyrolyzer with no extra steam, silica sand was selected as an inert material for comparison. The GHSV of the runs were around 2000 h−1with tar content of about 200 g/Nm3. The results suggest that 4Na2O·5TiO2presents the highest activity, Na2O·3TiO2ranks slightly lower, and silica sand shows no activity of enhancing hydrogen yield. The hydrogen formation is promoted through tar cracking, water gas shift and/or methane reforming. The H2/CO increases to 1.8–2.0, which is higher than that of silica sand (about 0.35) and raw gas (about 0.25). Tar conversion in the 4Na2O·5TiO2reforming was about 99% and nearly no coke was formed within the test duration of about 8 h, whereas the silica sand was coked obviously in 1 h. Most tar components can be effectively reformed, except for parts of xylene, naphthalene, biphenylene, and anthracene. The activity of 4Na2O·5TiO2decreases gradually in the long-term test because of the release of sodium and has a tendency to transform to Na2O·3TiO2, the latter exhibits satisfactory stability and activity.
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影响因子：
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作者：
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通讯作者：
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