Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Winston K. Robbins"'
Autor:
Winston K. Robbins, Ryan P. Rodgers, Steven M. Rowland, Jonathan C. Putman, Martha L. Chacón-Patiño, Alan G. Marshall, Mmilili M. Mapolelo, Sydney F. Niles
Publikováno v:
Faraday Discussions. 218:29-51
Direct "dilute and shoot" mass spectral analysis of complex naturally-occurring mixtures has become the "standard" analysis in environmental and petrochemical science, as well as in many other areas of research. Despite recent advances in ionization
Autor:
Jonathan C. Putman, Ryan P. Rodgers, Steven M. Rowland, Winston K. Robbins, David C. Podgorski
Publikováno v:
Energy & Fuels. 31:12064-12071
The herein described High Performance Liquid Chromatography (HPLC) platform (termed HPLC-3) combines a complex solvent gradient with two electron acceptor columns to provide aromatic ring class (ARC) separation for heavy oils. The separation yields s
Method for Isolation and Detection of Ketones Formed from High-Temperature Naphthenic Acid Corrosion
Autor:
Winston K. Robbins, Vladislav V. Lobodin, Alan G. Marshall, Logan C. Krajewski, Ryan P. Rodgers, Peng Jin, Gheorghe Bota
Publikováno v:
Energy & Fuels. 31:10674-10679
Corrosion control at refineries remains a challenge because the mechanism of naphthenic acid (NAP) corrosion is still not fully understood. The rate of NAP corrosion does not correlate with acidity (as measured by total acid number); therefore, it ha
Publikováno v:
Energy & Fuels. 29:7150-7155
The role of the water content adsorbed to silica gel for the selective isolation of petroleum interfacially active material was examined. Systematic variation of the amount of water adsorbed on the silica surface and its effect on retained petroleum
Publikováno v:
Energy & Fuels. 29:7058-7064
Isolation of crude oil components that concentrate at the oil/water interface [i.e., interfacial material (IM)] facilitates their molecular identification and quantitation, which is critical for advances in optimal petroleum production and processing
Publikováno v:
Energy & Fuels. 29:6177-6186
We present an efficient, easy-to-use chromatographic method to separate reactive and nonreactive sulfur compounds in crude oil for subsequent quantitative analysis and molecular characterization. Sulfur compounds in petroleum samples are separated by
Publikováno v:
Energy & Fuels. 28:5043-5048
Naphthenic (NAP) acids have been previously characterized by negative electrospray ionization (ESI) Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS), both directly and from acid extracts. Here, we show that collective character
Autor:
Benjamin J. Bythell, Amy M. McKenna, Ryan P. Rodgers, Leonard Nyadong, Winston K. Robbins, David C. Podgorski, Alan G. Marshall, Yuri E. Corilo, Vladislav V. Lobodin
Publikováno v:
Energy & Fuels. 27:1268-1276
Twenty-five years ago, Boduszynski et al. conducted a comprehensive study of heavy oil composition and concluded that crude oil composition increases gradually and continuously with regard to aromaticity, molecular weight, and heteroatom content from
Publikováno v:
Organic Geochemistry. 33:743-759
We present the selective ionization, resolution and identification of acidic NSO compounds in three crude oils of different geochemical origins by negative ion electrospray ionization (ESI) Fourier transform ion cyclotron resonance mass spectrometry
Autor:
Helen J. Cooper, Christine A. Hughey, Alan G. Marshall, Winston K. Robbins, Ryan P. Rodgers, Kuangnan Qian
Publikováno v:
Energy & Fuels. 15:1505-1511
Although crude acids are minor constituents in petroleum, they have significant implications for crude oil geochemistry, corrosion, and commerce. We have previously demonstrated that a single positive-ion electrospray ionization (ESI) high-field Four