A data processing combination of manual and automatic steps for mass peaks identification of a coking gas oil was illustrated.Some representative compounds were identified by manual process.A program was performed to ...A data processing combination of manual and automatic steps for mass peaks identification of a coking gas oil was illustrated.Some representative compounds were identified by manual process.A program was performed to search the various types with the same hetero-atoms(familes-class,NnSsOo)but different rings plus double bonds(R+DB)value(Z in CcH2c+ZNnOoSs),then,alkylation series of each types were revealed by multiplying each mass by 14.00000 in Kendrick mass scale.Finally,isotope groups of each identified peaks were picked up respectively.The method is appropriate to the data analysis of FT-ICR MS spectra with a poor mass accuracy.展开更多
To explore an effective method for reducing tar yield in biomass gasification,effects of petroleum coke on tar cracking during the gasification process of lees were examined.The influences of petroleum coke feeding mo...To explore an effective method for reducing tar yield in biomass gasification,effects of petroleum coke on tar cracking during the gasification process of lees were examined.The influences of petroleum coke feeding mode and particle size,water content in lees were tested in an electrically heated fixed bed tubular reactor at 700℃ under atmospheric pressure.Results show that the petroleum coke obviously affects the tar cracking in biomass gasification.Entering petroleum coke before lees into the reactor and using small petroleum coke particles are favorable for the tar cracking.The water content in lees also promotes the tar cracking and the yields of H2 and CO,however has little impact on the productions of CH4.The results are helpful to the research and development of the new co-gasification process of high water content biomass and petroleum coke.展开更多
Naphthenic acids (NAs) are complex mixtures of carboxylic acids that are responsible for the corrosivity of the crude oil with high total acid number(TAN).NAs are difficult to analyze due to their complexity and the l...Naphthenic acids (NAs) are complex mixtures of carboxylic acids that are responsible for the corrosivity of the crude oil with high total acid number(TAN).NAs are difficult to analyze due to their complexity and the lack of commercially available NA standards.This paper describes the use of negative-ion electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI FT-ICR MS) for the analysis of NAs in Liaohe heavy crude oil.FT-ICR MS resolves thousands of species in a single mass spectrum allowing for unambiguous determination of elemental composition.O2 classes (with two O heteroatoms in one molecule) and their carbon number (revealing the extent of alkylation) distribution were detailedly investigated.We find that 2-5 rings NAs is the dominate component of acidic compounds in Liaohe crude oil,espasically with a high abundance of steroid acids and hopanoic acids.Neg-ESI-FTMS is very well suited to the characterization of naphthenic acids within a crude oil sample.Determination of the nature of the naphthenic acids present provides vital information,such as the acids’ sizes and composition.展开更多
文摘A data processing combination of manual and automatic steps for mass peaks identification of a coking gas oil was illustrated.Some representative compounds were identified by manual process.A program was performed to search the various types with the same hetero-atoms(familes-class,NnSsOo)but different rings plus double bonds(R+DB)value(Z in CcH2c+ZNnOoSs),then,alkylation series of each types were revealed by multiplying each mass by 14.00000 in Kendrick mass scale.Finally,isotope groups of each identified peaks were picked up respectively.The method is appropriate to the data analysis of FT-ICR MS spectra with a poor mass accuracy.
文摘To explore an effective method for reducing tar yield in biomass gasification,effects of petroleum coke on tar cracking during the gasification process of lees were examined.The influences of petroleum coke feeding mode and particle size,water content in lees were tested in an electrically heated fixed bed tubular reactor at 700℃ under atmospheric pressure.Results show that the petroleum coke obviously affects the tar cracking in biomass gasification.Entering petroleum coke before lees into the reactor and using small petroleum coke particles are favorable for the tar cracking.The water content in lees also promotes the tar cracking and the yields of H2 and CO,however has little impact on the productions of CH4.The results are helpful to the research and development of the new co-gasification process of high water content biomass and petroleum coke.
文摘Naphthenic acids (NAs) are complex mixtures of carboxylic acids that are responsible for the corrosivity of the crude oil with high total acid number(TAN).NAs are difficult to analyze due to their complexity and the lack of commercially available NA standards.This paper describes the use of negative-ion electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI FT-ICR MS) for the analysis of NAs in Liaohe heavy crude oil.FT-ICR MS resolves thousands of species in a single mass spectrum allowing for unambiguous determination of elemental composition.O2 classes (with two O heteroatoms in one molecule) and their carbon number (revealing the extent of alkylation) distribution were detailedly investigated.We find that 2-5 rings NAs is the dominate component of acidic compounds in Liaohe crude oil,espasically with a high abundance of steroid acids and hopanoic acids.Neg-ESI-FTMS is very well suited to the characterization of naphthenic acids within a crude oil sample.Determination of the nature of the naphthenic acids present provides vital information,such as the acids’ sizes and composition.
