期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
Molecular investigation into the transformation of recalcitrant dissolved organic sulfur in refinery sour water during stripping process
1
作者 Yu-Guo Li Chen He +2 位作者 Chun-Mao Chen Fan Liu Quan Shi 《Petroleum Science》 SCIE EI CAS CSCD 2024年第3期2112-2119,共8页
Refinery sour water primarily originates from the tops of towers in various units and coker condensate,and cannot be discharged directly to a wastewater treatment plant due to high levels of chemical oxygen demand(COD... Refinery sour water primarily originates from the tops of towers in various units and coker condensate,and cannot be discharged directly to a wastewater treatment plant due to high levels of chemical oxygen demand(COD)and organic sulfur contents.Even after the recovery of H_(2)S from the sour water by the stripping process,the effluent still contains a high concentration of dissolved organic sulfur(DOS),which can have a huge bad influence.While chemical composition of dissolved organic matter(DOM)in refinery wastewater has been extensively studied,the investigation of recalcitrant DOS from sour waters remains unclear.In the present study,chemical composition of sour water DOMs(especially DOS)was investigated using fluorescence spectroscopy(excitation-emission matrix,EEM)and mass spectrometry,including gas chromatography-mass spectrometry(GC-MS)and high-resolution Orbitrap MS.The GC-MS and EEM results showed that volatile and low-aromaticity compounds were effectively removed during the stripping process,while compounds with high hydrophilicity and humification degree were found to be more recalcitrant.The Orbitrap MS results showed that weak-polar oxygenated sulfur compounds were easier to be removed than oxygenated compounds.However,the effluent still contained significant amounts of sulfur-containing compounds with multiple sulfur atoms,particularly in the form of highly unsaturated and aromatic compounds.The Orbitrap MS/MS results of CHOS-containing compounds from the effluent indicate that the sulfur atoms may exist as sulfonates,disulfide bonds,thioethers.Understanding the composition and structure of sour water DOS is crucial for the development of effective treatment processes that can target polysulfide compounds and minimize their impact on the environment. 展开更多
关键词 Molecular transformation Dissolved organic sulfur Stripping process Refinery sourwater Orbitrap MS
在线阅读 下载PDF
STUDY ON REGULATIONS OF SULFUR OCCURRENCE AND PYRITE MAGNETISM OF LATE PERMIAN COALS IN SOUTHWEST CHINA 被引量:3
2
作者 任德贻 唐跃刚 雷加锦 《Journal of China University of Mining and Technology》 1994年第2期64-73,共10页
The Permian coal in southwest China contains highest sulfur among the Chinese coal .Compositional variations of sumir in coal are mainly controlled by palaogeographital environmentsduring peat accumulation. High organ... The Permian coal in southwest China contains highest sulfur among the Chinese coal .Compositional variations of sumir in coal are mainly controlled by palaogeographital environmentsduring peat accumulation. High organic sulfur coal is formed in peat swamp developing in tidal flat of limited carbonate platform, and it is provided with especial petrologital and geochemical characteristics, and its organoschr-containing compounds are mainly thiophene series. The macroscopitaland microscopical shapes or types of pyrites in Late Permisn coal are diversined. Bituminous coal and anthracite are diamagnetic, but the pyrites are paramagnetic. The magnetic susceptibility oftbe pyrites is depended on the content of paramagnatic elements associnted with pyrites. 展开更多
关键词 high sulfur coal regulation of occurrence organic sulfur pyrite magnetism
在线阅读 下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部