固体核磁共振技术在甲醇制烯烃反应中的应用
高树树1,2,徐舒涛1,*(
),魏迎旭1,刘中民1
),魏迎旭1,刘中民1
Applications of Solid-State Nuclear Magnetic Resonance Spectroscopy in Methanol-to-Olefins Reaction
Shu-shu GAO1,2,Shu-tao XU1,*(),Ying-xu WEI1,Zhong-min LIU1
),Ying-xu WEI1,Zhong-min LIU1
图6. 298 K下SAPO-35 (a, d)、SAPO-34 (b, e)和DNL-6 (c, f)内甲烷的1H PFG NMR信号随梯度场强变化谱图(a~c)和甲烷自旋回波信号变化曲线(d~f)；(g) PFG NMR方法测定和MD模拟的甲烷自扩散系数；(h)甲烷自扩散系数的实验和模拟值随浓度的变化；(i)甲烷的自扩散系数随温度的变化[
Fig.6. (a~c) 1H PFG NMR signals decay with linearly increasing gradient magnetic field strength in 16 steps for SAPO-35 (a), SAPO-34 (b) and DNL-6 (c) measured at 298 K. (d~f) The corresponding spin echo attention of PFG NMR on the log-linear scale for SAPO-35 (d), SAPO-34 (e) and DNL-6 (f) measured at 298 K. (g) The self-diffusion coefficients of methane acquired by PFG NMR and MD; (h) The loading dependence of experimental and simulated self-diffusion coefficients for methane; (i) The temperature dependence of self-diffusion coefficients for methane[
