ESI FT-ICR mass spectral analysis of coal liquefaction products |
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| Affiliation: | 1. Ion Cyclotron Resonance Program, National High Magnetic Field Laboratory, Florida State University, 1800 East Paul Dirac Drive, Tallahassee, FL 32310-4005, USA;2. Department of Chemistry and Biochemistry, Florida State University, Tallahassee, FL 32306, USA;1. Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India;2. Department of Physics, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India;3. IITB-Monash Research Academy, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India;4. Centre for Research in Nanotechnology and Science (CRNTS), Indian Institute of Technology Bombay, Powai, Mumbai 400076, India;5. National Centre for Photovoltaic Research and Education, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India;1. Key Laboratory of Coal Processing and Efficient Utilization, Ministry of Education, China University of Mining & Technology, Xuzhou 221116, Jiangsu, China;2. Department of Applied Chemistry, College of Physics and Chemistry, Henan Polytechnic University, Jiaozuo 454003, Henan, China;1. College of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China;2. Shanghai Research Institute, National Engineering Laboratory for Direct Coal Liquefaction, China Shenhua Coal to Liquid and Chemical Co., Ltd., Shanghai 201108, China |
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| Abstract: | We have applied electrospray ionization (ESI) Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) to analyze the pyridine soluble fraction of a distillation resid and a further processed liquid product in a coal liquefaction process. The inherent high resolving power (m/Δm50%>300,000, in which Δm50% is full mass spectral peak width at half-maximum peak height) and mass accuracy (<1 ppm) of FT-ICR MS makes it possible to resolve and identify polar heteroatomic species. The resid contains more heteroatomic compounds and a higher molecular weight distribution whereas the liquid sample is lower in average mass and more saturated. The data confirms that the liquefaction process produces lower mass, hydrogenated liquid product whereas the resid (highly aromatic and of high heteroatom content) must be recycled to reduce its heteroatom content and increase its degree of saturation. |
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