Analytical pyrolysis-comprehensive two-dimensional gas chromatography/mass spectrometry (Py-GC×GC/MS) was employed for the on-line analysis of catalytic pyrolysis products distribution and furans selectivity of corncob. Different catalysts (TiO₂, ZrO₂, MCM-41 and activated carbon (AC)) and catalytic temperature (350 °C, 400 °C, 450 °C and 500 °C) were investigated. The catalysts were subjected to several characterization methods, including temperature programmed decomposition of ammonia (NH₃-TPD) and N₂ adsorption-desorption, to investigate the effects of physical-chemical properties of the catalysts on products distribution and furans selectivity. The experiment results showed that a lower catalytic temperature (≤ 400 °C) was conductive to form furans and higher catalytic temperature (≥ 450 °C) was promoted hydrocarbons formation, among the four catalysts. The AC catalyst gave higher furans relative peak area (54.48%) than other catalysts (31.24% ~ 41.99%). And higher total acidity (weak acidity) of AC was favored for the formation of furfural and furan, 2-methyl- at 350 °C. Moreover, AC had the great thermal stability, and the catalyst recycling tests showed that the prepared AC can be reused for five times in furan-rich bio-oil production. After cycle, the relative peak area of furans also maintained above 40%. In addition, furan, 2-methyl- always maintained a high relative peak area (8%). It was expected that four type catalysts can be widely used for biomass catalytic conversion to produce furans processes at low catalytic temperature, especially the AC.

分析热解-综合二维气相色谱/质谱法（Py-GC×GC / MS）用于玉米芯催化热解产物分布和呋喃选择性的在线分析。研究了不同的催化剂（TiO ₂，ZrO ₂，MCM-41和活性炭（AC））和催化温度（350°C，400°C，450°C和500°C）。催化剂经历了几种表征方法，包括程序升温分解氨气（NH ₃ -TPD）和N _{2的方法。}吸附-解吸，以研究催化剂的物理化学性质对产物分布和呋喃选择性的影响。实验结果表明，在这四种催化剂中，较低的催化温度（≤400°C）有助于形成呋喃，而较高的催化温度（≥450°C）则促进了烃的形成。AC催化剂的呋喃相对峰面积（54.48％）比其他催化剂（31.24％〜41.99％）高。AC较高的总酸度（弱酸度）有利于糠醛和呋喃（2-甲基）在350°C的形成。此外，AC具有良好的热稳定性，催化剂循环测试表明，所制备的AC可在富呋喃生物油生产中重复使用5次。循环后，呋喃的相对峰面积也保持在40％以上。另外，呋喃 2-甲基始终保持较高的相对峰面积（8％）。预期四种类型的催化剂可广泛用于生物质催化转化以在低催化温度下产生呋喃方法，特别是AC。