CF自由基5pπE2Пr(ν’=1)←X2П(ν’’=0)带的转动分析

The two-photon resonance-enhanced multiphoton ionization spectrum between 285 and 288.5 nm of the 5pπE2Πr(v’=1)←X2Πr(v’’=0) band of CF radical is reported. The band is rotationally analyzed, and the spectroscopic constants of the state are first derived: σ0 = 69566.38±0.52 cm-1, A'v= 46.4±0.3 cm-1, B'v= 2.565±0.017 cm-1, D' v = (8.6±1.2)×10-6cm-1.     

生物质快速热解制备液体燃料

本文回顾了生物质快速热解液化技术的国内外研究现状,重点叙述了初级生物油的化学组成和燃料性质,指出生物油是一种复杂的含氧有机混合物,具有水分含量高、氧含量高、热值低、酸含量高、安定性差和化石燃油不互溶等独特的性质;针对这些性质,介绍了几种常用的生物油精制提炼方法,包括催化裂解、催化加氢、高温热解气过滤、添加助剂、催化酯化、柴油乳化以及制备富氢合成气与费托合成,并分析了各种精制技术发展的关键问题.     

SF_2自由基4s和态的共振增强多光子电离研究

利用六氟化硫和氩气混合样品直流脉冲放电产生SF2 自由基 ,观测得到 3 2 0— 3 65nm波长范围内SF2 自由基的 ( 2 1)共振增强多光子电离 (REMPI)光谱 .经分析 ,该REMPI谱对应于SF2 自由基的 4s( B1B1)Rydberg态和 C态的共振双光子吸收 ,获得了二个态的全对称伸缩振动模 (ω′1)和OPLA模 (ω′2 )的振动频率值 .初步澄清了 C态的带源及振动属性 ,并对 C态附近SF2 自由基的解离行为进行了讨论     

用不同类型的分子筛催化剂催化转化生物油制烯烃

研究了用一系列不同类型的分子筛催化剂催化转化制取低碳烯烃的过程,测试的催化剂包括HZSM-5、MCM-41、SAPO- 34和Y型分子筛．按照低碳烯烃的绝对收率和选择性,催化剂的活性排序为：HZSM-5>SAPO-34>MCM-41>Y型分子筛．研究表明,使用HZSM-5分子筛催化剂,获得的生物油最大低碳烯烃收率约为0.22 kg/(kg生物油),低碳烯烃的选择性约为50%,且生物油几乎实现完全转化．同时还研究了反应条件对生物油制低碳烯烃的影响．为了弄清催化剂结构与和低碳烯烃形成之间的关系,对相关催化剂进行了详细表征,对生物油热裂解和催化裂解过程进行了详细比较．     

Effects of Current upon Electrochemical Catalytic Reforming of Anisole

The reforming of anisole (as model compound of bio-oil) was performed over the NiCuZn-Al₂O₃ catalyst, using a recently-developed electrochemical catalytic reforming (ECR). The influence of the current on the anisole reforming in the ECR process has been investigated. It was observed that anisole reforming was significantly enhanced by the current approached over the catalyst in the electrochemical catalytic process, which was due to the non-uniform temperature distribution in the catalytic bed and the role of the thermal electrons orig-inating from the electrified wire. The maximum hydrogen yield of 88.7% with a carbon conversion of 98.3% was obtained through the ECR reforming of anisole at 700 oC and 4 A. X-ray diffraction was employed to characterize catalyst features and their alterations in the anisole reforming. The apparent activation energy for the anisole reforming is calculated as 99.54 kJ/mol, which is higher than ethanol, acetic acid, and light fraction of bio-oil. It should owe to different physical and chemical properties and reforming mechanism for different hydrocarbons.     

利用生物质气化合成气在FeCuZnAlK催化剂上高效制备清洁生物燃料

研究了生物质气化合成气在Fe_1.5Cu₁Zn₁Al₁K_0.117催化剂上高效转化为清洁生物燃料的合成过程. 利用生物质气化合成气合成的生物燃料最大产率为1.59 kg/(kgcatal·h), 其中醇占0.57 kg/(kgcatal·h), 液体烃占1.02 kg/(kgcatal·h). 在生物燃料中, 醇类产物主要为C2⁺醇(主要为C2-C6高碳醇), 其含量占总醇的7     

木质素电催化转化制取苯

The directional production of benzene is achieved by the current-enhanced catalytic conversion of lignin. The synergistic effect between catalyst and current promotes the depolymerization of lignin and the selective recombinant of the functional groups in the aromatic monomers. A high benzene yield of 175 g_benzene/kg_lignin was obtained with an excellent selectivity of 92.9 C-mol%. The process potentially provides a promising route for the production of basic petrochemical materials or high value-added chemicals using renewable biomass.     

332—362nm范围内CF2Cl自由基的共振增强多光子电离研究

用CF₂Cl₂分子直流脉冲放电的方法产生CF₂Cl自由基，结合共振增强多光子电离(REMPI)技术，测量了332—362nm波长范围内CF₂Cl自由基的(2+1)REMPI光谱，分析并标识了4s Rydberg态带源位于(ν_0—0=55371cm^-1)，两个被激活振动模ω′₃(CF₂剪式振动模)和ω₄′(OPL 关键词：     

多种金属掺杂的镍基催化剂用于中温重整生物油制氢的设计

一种新的由共沉淀法合成的多种金属(铜、镁、铈)掺杂的镍基混合氧化物催化剂,在250～500 oC用于生物油高效重整制氢. 摩尔比为Ni:Cu:Mg:Ce:Al=5.6:1.1:1.9:1.0:9.9的催化剂表现出较高的催化重整活性,在传统的水蒸气重整模式和500 oC条件下,氢产率达82.8%;电催化重整模式中,在400 oC 和3.1 A,氢产率达91.1%.ECR模式中重整温度和通过催化剂电流促进生物油的重整和热裂解.另外催化剂在300～600 oC显示出较高的水煤气变化反应活性,生物油重整过程中催化剂性质的变化利用ICP、XRD、XPS和BET进行了表征. 生物油重整机理基于基元反应、催化剂表征进行了讨论.