Entity

Time filter

Source Type


Tang X.,China University of Petroleum - Beijing | Li S.Y.,China University of Petroleum - Beijing | Yue C.T.,China University of Petroleum - Beijing | He J.L.,Shandong Energy Longkou Mining Group Co. | Gong Y.E.,China University of Petroleum - Beijing
Advanced Materials Research | Year: 2013

New lumping kinetic models, considering the effects of the nitrogen content in product and the correction coefficient of LHSV, were proposed to describe the hydrodesulfurization of crude Longkou shale oil. The kinetic parameters were obtained using nonlinear regression of the experimental data which were conducted in a bench-scale trick-bed reactor with NiW/Al2O3 catalyst at various conditions. The results show that the 4-lump model is the optimal model. The values of apparent activation energies of lumps 1, 2, 3 and 4 are 51.14, 62.64, 130 and 166.42kJ/mol, respectively. The validation and application of the 4-lump model were also investigated. © (2013) Trans Tech Publications, Switzerland. Source


Tang X.,China University of Petroleum - Beijing | Li S.Y.,China University of Petroleum - Beijing | Yue C.T.,China University of Petroleum - Beijing | He J.L.,Shandong Energy Longkou Mining Group Co. | Hou J.L.,China University of Petroleum - Beijing
Advanced Materials Research | Year: 2013

The hydrodenitrogenation (HDN) of Longkou shale oil were carried out in microscale trick-bed reactor over a commercial NiW/Al2O3 catalyst with high HDN activity. The effects of temperature, pressure, liquid hourly space velocity (LHSV) and hydrogen/oil ratio on the conversions of total, basic and non-basic nitrogen compounds were investigated at various conditions (340-420°C, 0.2-2h-1, 4-9MPa and 400-1000 L/L). The results show that basic nitrogen compounds have higher HDN reactivity than non-basic nitrogen. The distributions and species of nitrogen compounds in Longkou shale oil were also investigated. About 33% of total nitrogen is present in big molecules with high boiling point. The nitrogen compounds in Longkou shale oil are mainly composed by seven kinds of components (nitriles, anilines, pyridines, quinolines, acridines, carbazoles and indoles). © (2013) Trans Tech Publications, Switzerland. Source


Shi Y.,Dalian University of Technology | Li S.,China University of Petroleum - Beijing | Ma Y.,China University of Petroleum - Beijing | Yue C.,China University of Petroleum - Beijing | And 3 more authors.
Oil Shale | Year: 2012

In this paper, the basic principle and features of the process carried out in a Sanjiang(SJ)-type rectangular pilot-scale retort have been described. The suitability of the SJ retort for processing oil shale from Yaojie (YJ) county, Gansu province, China was investigated to find optimal conditions for an effective recovery of shale oil. The pyrolysis of lump YJ oil shale was carried out in the SJ pilot retort with a daily processing capacity of 24 tons of oil shale. It was found that the heat value of the pyrolysis gas produced from YJ oil shale was sufficient to provide the heat needed for retorting. The pyrolysis temperature fluctuated between 550 and 700 °C, with an average of 610 °C. The results of the study demonstrate that the shale oil yield from YJ oil shale is high, accounting for about 85% vs. Fisher assay. The shale oil consists mainly of diesel and heavy fractions, and the spent shale is of high calorific value. © 2012 Estonian Academy Publishers. Source


Geng C.,China University of Petroleum - Beijing | Li S.,China University of Petroleum - Beijing | Ma Y.,China University of Petroleum - Beijing | Yue C.,Shandong Energy Longkou Mining Group Co. | And 2 more authors.
Oil Shale | Year: 2012

Methods of acid-base separation and extrography were used to decompose shale oil of Longkou oil shale (LSO), Shandong province, and coal tar of Shenmu coal (SCT), Shanxi province, both China, into acid, base and neutral fractions. The molecular structure and mass distribution of the oxygen compounds present in LSO and SCT were investigated using gas chromatography-mass spectrometry (GC-MS) and negative-ion electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry (ESI FT-ICR MS). The results of GC-MS showed that oxygen compounds in the acid fractions of LSO and SCT were phenols, indanols, naphthols, phenylphenols, fluorenols and phenanthrenols, and their derivatives, while oxygen compounds in neutral fractions 4 and 5 were aliphatic ketones, esters and minor aromatic ketones. The results of ESI FT-ICR MS demonstrated that in LSO, O1, O2, O3, N1O1, N1O2, N1and N2 compounds were determined with O1 and O2 compounds as the most abundant. SCT contained O1, O2, O3, O4, O5 and O6 compounds, while O2 and O3 compounds dominated. © 2012 Estonian Academy Publishers. Source


Wang W.,China University of Petroleum - Beijing | Ma Y.,China University of Petroleum - Beijing | Li S.,China University of Petroleum - Beijing | Shi J.,China University of Petroleum - Beijing | Teng J.,Shandong Energy Longkou Mining Group Co.
Energy and Fuels | Year: 2016

The reaction involving radical species is a key factor during the pyrolysis process used to form hydrocarbons. In this study, electron paramagnetic resonance (EPR) spectroscopy was used to characterize the properties of free radicals in the pyrolysates of oil shale. Effects of temperature on the yields and the EPR properties of thermal bitumen, shale oil, and semicoke were investigated, with the aim to understand the behavior of free radicals during the oil shale pyrolysis process. This study shows that the free radical concentrations (Ng) of shale oil and semicoke become higher with increasing temperature. The yield and Ng of thermal bitumen as an intermediate product follow the similar trends in the whole temperature range, first increasing and then decreasing. This is attributed to the competing mechnism of thermal bitumen generation and decomposition. The Ng of shale oil is lower than those of semicoke and thermal bitumen due to the coupling reaction of free radicals before the volatiles being condensed. The g-values and linewidths of thermal bitumen, shale oil, and semicoke are also affected by temperature, revealing the changing chemical structure and the surrounding environment of free radicals during the pyrolysis process. © 2016 American Chemical Society. Source

Discover hidden collaborations