Hydrocracking of Gudao Residual Oil with Dispersed Catalysts Using Supercritical Water-Syngas as a Hydrogen Source. Part II: The Comparison of Residue Hydrocracking in Different Hydrogen Sources

Different catalytical hydrogen sources were compared with molecular hydrogen gas in the hydrocracking of Gudao residue in the presence of catalysts (PMA). The results showed that alternative hydrogen sources were effective in catalytic hydroconversion of heavy oil. The hydroconversion of residue in supercritical water-syngas system showed similar results when performed with molecular hydrogen.     

Hydrocracking of Gudao Residual Oil with Dispersed Catalysts Using Supercritical Water-Syngas as a Hydrogen Source

Heavy oil upgrading is a very important process in the petroleum industry, but is very difficult because it has a high impurity content. A variety of heavy oil upgrading technologies have been developed in the world, including the catalytic hydrocracking process, which can process various heavy oils with a high yield of liquid products. Although this technology is one of the most widely used methods for upgrading heavy oil, the use of expensive molecular hydrogen is costly. The heavy oil upgrading technology with alternative hydrogen is very important. The catalytic hydroconversion of Gudao residue with different catalysts using water-syngas as an alternative hydrogen was investigated in this study. Hydrogen is provided in-situ for hydrocracking through the water-gas shift reaction (WGSR). The experimental results show that catalysts play a very important role in catalytic hydroconversion of Gudao residue using water-syngas as an alternative hydrogen. Addition of catalysts to residue was found to improve the distribution or properties of cracking products and inhibit the asphaltene or TI formation.     

Hydrocracking of Gudao Residual Oil with Dispersed Catalysts Using Supercritical Water-Syngas as a Hydrogen Source

Abstract:

Heavy oil upgrading is a very important process in the petroleum industry, but is very difficult because it has a high impurity content. A variety of heavy oil upgrading technologies have been developed in the world, including the catalytic hydrocracking process, which can process various heavy oils with a high yield of liquid products. Although this technology is one of the most widely used methods for upgrading heavy oil, the use of expensive molecular hydrogen is costly. The heavy oil upgrading technology with alternative hydrogen is very important. The catalytic hydroconversion of Gudao residue with different catalysts using water-syngas as an alternative hydrogen was investigated in this study. Hydrogen is provided in-situ for hydrocracking through the water-gas shift reaction (WGSR). The experimental results show that catalysts play a very important role in catalytic hydroconversion of Gudao residue using water-syngas as an alternative hydrogen. Addition of catalysts to residue was found to improve the distribution or properties of cracking products and inhibit the asphaltene or TI formation.     

Hydrocracking Gudao Residual Oil Using Supercritical Water-Syngas as Hydrogen Source in Suspension Bed. Part III: Water-Gas Shift Reaction

Abstract

The catalytic hydroconversion of Gudao residue in supercritical water-syngas system is a heavy oil upgrading technology. The hydrogen derived from water-gas shift reaction can be used for residue hydrocracking, so, it is important for studying the water-gas shift reaction that takes place in the hydrocracking system. Here, the water-gas shift reaction in the supercritical water-syngas system was investigated. The results showed that the water-gas shift reaction could be effectively increased with dispersed catalysts, and more than 80% CO was conversed in the initial processes.     

孤岛减压渣油在CO-SCW体系中催化加氢

对孤岛减压渣油在CO -SCW体系中加氢改质研究表明 ,利用CO与SCW发生的水 -气变换反应获得加氢所需氢源是可行的。在适宜的条件下 ,渣油在CO -SCW体系中改质可达到在H2 -SCW体系中改质同样的效果     

Upgrading Heavy Oil Using Syngas as the Hydrogen Source with Dispersed Catalysts

Abstract

Upgrading heavy oil using syngas (CO + H₂) as an alternative hydrogen source with a dispersed catalyst was investigated. Finely dispersed catalysts for upgrading were prepared by means of microemulsion, and their performance was investigated in a batch-type autoclave. This process was compared to the traditional pure hydrogen hydro-upgrading process. Feedstock conversion, light-oil yield, coke yield, product distribution, sulfur, nitrogen and viscosity were investigated comprehensively to optimize the process. The addition of finely dispersed catalysts could improve the distribution and performance of cracking products, and inhibit the cracking gas and coke formation. This work shows that residue-syngas coprocessing is promising for heavy oil upgrading.     

Characterization of Nitrogen Compounds in Vacuum Residue and Their Structure Comparison with Coker Gas Oil

In this study, the heteroatom classes and molecular structures of nitrogen compounds in vacuum residue are characterized by the electrospray ionization(ESI) Fourier transform ion cyclotron resonance mass spectrometry(FT-ICR MS) combined with the Fourier transform infrared(FT-IR) spectroscopy. The results demonstrate that three basic nitrogen compounds, N1(in which a molecule contains one nitrogen atom, similarly hereinafter), N1O1 and N2, are identified by their positive-ion mass spectra, and three non-basic nitrogen compounds, N1, N1O1, and N1S1, are characterized by their negative-ion mass spectra. Among these nitrogen compounds, the N1 class species are the most predominant. Combined with the data of ESI FT-ICR MS and FT-IR, the basic N1 class species are likely alkyl quinolines, naphthenic quinolines, acridines, benzonacridines, while the abundant non-basic N1 class species are derivatives of benzocarbazole. In comparison with CGO, the N1 basic nitrogen compounds in VR exhibit a higher average degree of condensation and have much longer alkyl side chains.     

水平井在具有气顶的普通稠油油藏开发中的应用--以孤东油田四区为例

目前对具有气顶的普通稠油油藏提高采收率方面的研究甚少,主要矛盾是在合理利用气顶能量的同时,最大限度地提高原油的产量但又不至于发生气窜。通过对实例的研究,采用水平井进行开发,在进行水平井参数优化的基础上,解决了该矛盾。