引用本文:
【打印本页】   【HTML】   【下载PDF全文】   View/Add Comment  【EndNote】   【RefMan】   【BibTex】
过刊浏览    高级检索
本文已被:浏览 43次   下载 60  
分享到: 微信 更多
Catalytic Pyrolysis of a Biodiesel Surrogate over a HZSM-5 Zeolite Catalyst
Zhang Lidong
University of Science and Technology of China
Abstract:
To obtain insight into the catalytic reaction mechanism of biodiesels over ZSM-5 zeolites, the pyrolysis and catalytic pyrolysis of methyl butanoate (MB), a biodiesel surrogate, with H-type ZSM-5 (HZSM-5) was performed in a flow reactor under atmospheric pressure. The pyrolysis products were identified and quantified using gas chromatography-mass spectrometry (GC-MS). Kinetic modelling and experimental revealed that H-atom abstraction in the gas phase was the primary pathway for MB decomposition during pyrolysis, but dissociating to ketene and methanol over HZSM-5 was the primary pathway for MB consumption during catalytic pyrolysis. The initial decomposition temperature of MB was reduced by approximately 300 K over HZSM-5 compared to that for the uncatalyzed reaction. In addition, the apparent activation energies of MB under catalytic pyrolysis and homogeneous pyrolysis conditions were obtained using the Arrhenius equation. The significantly reduced apparent activation energy confirmed the catalytic performance of HZSM-5 for MB pyrolysis. The activation temperature may also affect some catalytic properties of HZSM-5. Overall, this study can be used to guide subsequent catalytic combustion for practical biodiesel fuels.
Key words:  Methyl butanoate  HZSM-5  Catalytic pyrolysis  Reaction kinetics  Biodiesels
FundProject:
Supplymentary:   (For_review)_Catalytic_Pyrolysis_of_a_Biodiesel_Surrogate_CJPC.docx
一种生物柴油代用品在HZSM-5分子筛催化剂上的催化热解
张李东
中国科学技术大学
摘要:
为了深入了解生物柴油在ZSM-5沸石上的催化反应机理,在常压的流动反应器中进行了生物柴油代用品丁酸甲酯(MB)在氢型ZSM-5(HZSM-5)催化剂上的热解和催化热解。热解产物使用气相色谱-质谱法(GC-MS)定性和定量。动力学模型和实验表明,气相中氢提取反应是热解过程中MB分解的主要途径,但在HZSM-5上,MB则主要通过解离生成烯酮和甲醇消耗,与无催化反应相比,MB在HZSM-5上的初始分解温度降低了约300K。并且通过Arrhenius方程获得了在催化热解和均相热解条件下MB消耗的表观活化能。明显降低的表观活化能证实了HZSM-5对MB热解的催化性能。此外催化剂的活化温度对HZSM-5的某些催化性能具有一定的影响。总体而言,该研究对进一步的实际生物柴油燃料的催化燃烧具有一定的指导意义。
关键词:  丁酸甲酯  HZSM-5  催化热解  反应动力学  生物柴油
DOI:
分类号: