Catalytic cracking of tar derived from rice hull gasification over palygorskite-supported Fe and Ni
Catalytic cracking of tar derived from rice hull gasification over palygorskite-supported Fe and Ni
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DOI：
10.1016/j.molcata.2012.07.005
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发表时间：
2012-07
影响因子：
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通讯作者：
Haibo Liu;Tianhu Chen;D. Chang;Dong Chen;Hongping He;R. Frost
中科院分区：
文献类型：
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作者：
Haibo Liu;Tianhu Chen;D. Chang;Dong Chen;Hongping He;R. Frost
研究了500°C预焙烧还原的Fe-Ni/PG（PG：坡缕石）催化剂对稻壳船体气化焦油的催化分解性能。采用X射线衍射、氢还原温度和透射电子显微镜对材料进行了表征。结果表明，Fe-Ni/PG催化剂制备过程中，前驱体焙烧和还原过程中生成了尖晶石结构的铁氧体（（Fe，Ni）3 O 4），在Fe 6-Ni 9/PG催化剂上生成了NiO金属氧化物颗粒。实验结果表明，Fe-Ni/PG催化剂比天然PG催化剂具有更高的催化活性，焦油去除率与Fe 10-Ni 6/PG催化剂相当（99.5%）。Fe 6-Ni 9/PG催化剂具有较高的催化活性和较强的抗积炭能力，这归因于NiO纳米粒子的存在。因此，镍和铁氧化物的添加对稻壳船体生物质焦油的催化裂解起着重要作用。
The catalytic performance of Fe–Ni/PG (PG: palygorskite) catalysts pre-calcined and reduced at 500°C for catalytic decomposition of tar derived through rice hull gasification was investigated. The materials were characterized by using X-ray diffraction, hydrogen temperature reduction, and transmission electron microscopy. The results showed that ferrites with spinel structure ((Fe, Ni)3O4) were formed during preparation of bimetallic systems during calcination and reduction of the precursors (Fe–Ni/PG catalysts) and NiO metal oxide particles were formed over Fe6–Ni9/PG catalyst. The obtained experimental data showed that Fe–Ni/PG catalysts had greater catalytic activity than natural PG. Tar removal using Fe6–Ni9/PG catalyst was as high as Fe10–Ni6/PG catalyst (99.5%). Fe6–Ni9/PG showed greater catalytic activity with greater H2yield and showed stronger resistance to carbon deposition, attributed to the presence of NiO nanoparticles. Thus, the addition of nickel and iron oxides played an important role in catalytic cracking of rice hull biomass tar.