TY - JOUR
T1 - NMR analysis of the Fischer-Tropsch wastewater
T2 - Combination of 1D selective gradient TOCSY, 2D DOSY and qNMR
AU - Ma, Hui
AU - Pedersen, Christian Marcus
AU - Zhao, Qi
AU - Lyu, Zexiang
AU - Chang, Hui
AU - Qiao, Yan
AU - Hou, Xianglin
AU - Wang, Yingxiong
PY - 2019/8/20
Y1 - 2019/8/20
N2 - The Fischer–Tropsch (FT) process is a practical approach to convert synthesis gas (CO and H 2 ) into hydrocarbons and oxygenates, and these product mixtures are usually well-characterized. However, the analysis of Fischer–Tropsch waste water (FTW) is still somewhat underdeveloped and the exact composition of FTW remains unclear. Herein, various qualitative NMR techniques, especially diffusion-ordered spectroscopy (DOSY) and one dimension (1D) selective gradient total correlation spectroscopy (SelTOCSY) were strategically applied in the analysis of FTW. The NMR results show that the DOSY technique can pseudo-separate most of components in complex mixtures over the diffusion dimension. The SelTOCSY technique is used as a supporting method in the cases where the DOSY technique cannot clearly distinguish overlapped signals. Moreover, the quantitative 1 H NMR (qNMR) was further used to quantify the components of the sample. These routine and advanced qualitative and quantitative NMR technique utilized here provide a fast, effective and feasible method for the identification of complex mixtures in FTW, which might be a powerful and fast alternative to gas chromatography or high performance liquid chromatography for FTW research.
AB - The Fischer–Tropsch (FT) process is a practical approach to convert synthesis gas (CO and H 2 ) into hydrocarbons and oxygenates, and these product mixtures are usually well-characterized. However, the analysis of Fischer–Tropsch waste water (FTW) is still somewhat underdeveloped and the exact composition of FTW remains unclear. Herein, various qualitative NMR techniques, especially diffusion-ordered spectroscopy (DOSY) and one dimension (1D) selective gradient total correlation spectroscopy (SelTOCSY) were strategically applied in the analysis of FTW. The NMR results show that the DOSY technique can pseudo-separate most of components in complex mixtures over the diffusion dimension. The SelTOCSY technique is used as a supporting method in the cases where the DOSY technique cannot clearly distinguish overlapped signals. Moreover, the quantitative 1 H NMR (qNMR) was further used to quantify the components of the sample. These routine and advanced qualitative and quantitative NMR technique utilized here provide a fast, effective and feasible method for the identification of complex mixtures in FTW, which might be a powerful and fast alternative to gas chromatography or high performance liquid chromatography for FTW research.
U2 - 10.1016/j.aca.2019.04.007
DO - 10.1016/j.aca.2019.04.007
M3 - Journal article
C2 - 31027531
SN - 0003-2670
VL - 1066
SP - 21
EP - 27
JO - Analytica Chimica Acta
JF - Analytica Chimica Acta
ER -