Shandong Energy Longkou Mining Group Co.

China

Shandong Energy Longkou Mining Group Co.

China
SEARCH FILTERS
Time filter
Source Type

Shi J.,China University of Petroleum - Beijing | Ma Y.,China University of Petroleum - Beijing | Li S.,China University of Petroleum - Beijing | Wu J.,China University of Petroleum - Beijing | And 2 more authors.
Energy and Fuels | Year: 2017

Preparation and collection of thermal bitumen, a pyrolytic intermediate, are key factors in elucidating the mechanism of oil shale pyrolysis. Electron paramagnetic resonance (EPR), gas chromatography, Fourier transform infrared spectrophotometry, nuclear magnetic resonance (NMR) spectrometry, distortionless enhancement by polarization transfer (DEPT), and X-ray photoelectron spectroscopy were employed to investigate the thermochemical transformation in oil shale pyrolysis. Results showed that thermal bitumen was continuously generated and decomposed during the pyrolysis process. The maximum yield of thermal bitumen at 380 °C was 11.17%. EPR analysis showed that the g factor of kerogen and the pyrolysates was slightly higher than 2 and increased as pyrolysis progressed because of the aromatization of saturates and decarboxylation. CO2 and CO were mainly generated at temperatures lower than 340 °C, and less was obtained in the subsequent pyrolysis process. In contrast, C2-C5 organic gases were mainly generated at temperatures higher than 340 °C. NMR and DEPT analyses indicated that kerogen, thermal bitumen, and shale oil were mainly composed of aliphatic structures. During the pyrolysis process, aliphatic structures were constantly transformed into aromatic compounds, which were easily retained in shale oil and semi-coke. Pyrrolic, pyridinic, and quaternary compounds constituted 80% of the nitrogen compounds in kerogen and the pyrolysates. The sulfoxide content of thermal bitumen and semi-coke was considerably higher than that of kerogen, indicating that sulfoxide compounds present better thermostability during the pyrolysis process. © 2017 American Chemical Society.


Zuo J.-P.,China University of Mining and Technology | Sun Y.-J.,China University of Mining and Technology | Jiang G.-H.,China University of Mining and Technology | Wang P.-F.,Shandong Energy Longkou Mining Group Co. | And 2 more authors.
Meitan Xuebao/Journal of the China Coal Society | Year: 2017

Based on the engineering background of Beizao Coal Mine in Longkou, the ascending combined mining method of coal and oil shale is put forward in this paper. The key problems of combined mining on coal and oil shale include the failure mechanism and post-peak strength characteristics of oil shale, mining face layout and surrounding rock control, the mining discontinuous deformation analysis of oil shale etc. The oil shale will fail after the excavation of coal, and then be compacted. The strength of failed oil shale will increase with compacting. Therefore, the oil shale can be mined at a reasonable range of strength. Research indicates that the reasonable spacing range of layers is about from 13.2 m to 32.9 m for the ascending combined mining of coal and oil shale in Beizao Coal Mine. MDDA program has been used to simulate the combined mining of coal and oil shale. Simulation results indicates that the oil shale mining face can be arranged behind the coal mining face more than 125 m. The combined mining of coal and oil shale has been successfully applied in Beizao Coal Mine, which achieved good economic benefits and realized sustainable the development of the coal mine. © 2017, Editorial Office of Journal of China Coal Society. All right reserved.


Pan L.-Y.,Shandong University of Science and Technology | Chen L.-Q.,Shandong University of Science and Technology | Zhang R.-X.,Shandong Energy Longkou Mining Group Co.
Yantu Gongcheng Xuebao/Chinese Journal of Geotechnical Engineering | Year: 2015

For the geological conditions of two soft coal seams, mechanical models for rockburst occurring in two soft coal seams. Mechanical analysis and field practice of these models show that the main causes for rockburst in deep two soft coal seams are the stress concentration and energy accumulation in the soft alluvium that is clamped in the upper force source layer and the lower stable layer, and the energy accumulated from mining activities which releases to crushing mitigation areas, causing instantaneous ejection of coal and rock blocks and forming the rock burst. Through the researches on stress, energy, material conditions and inducing factors for burst of deep two soft coal seams, the prevention measures for rockburst of block structure of the roof support structure such as transferring stress, maintaining the stability of chain pillars, strengthening coal side, and loosening working slope are formulated. Field practice is made so as to realize the safe and high-efficiency non-impact mining at working faces. ©, 2015, Chinese Society of Civil Engineering. All right reserved.


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.


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.


Hou J.,China University of Petroleum - Beijing | Li S.,China University of Petroleum - Beijing | Ma Y.,China University of Petroleum - Beijing | Geng C.,China University of Petroleum - Beijing | And 3 more authors.
Energy and Fuels | Year: 2016

In this paper, with 1000 kg of oil shale for research, the heat and material balance of Myanmar oil shale processing by Sanjiang gas combustion rectangular retort (SJ-retort) was calculated. The results show that the heat requirement of Myanmar oil shale retorting can be satisfied by its high-calorie retorting gas combustion as well as the heat release from the retorting process. In the study, 33.26% surplus retorting gas is obtained, which indicates that the Myanmar oil shale processing by SJ-retort is theoretically feasible. In addition, a concise and accurate method is proposed to calculate the gas balance of the retorting process, which can calculate the dynamic equilibrium value of various types of gases (total input and output gases, recycle gases, and the new air that enters the retort) when the retorting system reaches a steady state. This method was validated with the successful operation of a pilot-scale test for oil shale retorting in Shenmu of Shanxi province and Yaojie of Gansu province in China. © 2016 American Chemical Society.


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.


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.


Wang W.,China University of Petroleum - Beijing | Li S.,China University of Petroleum - Beijing | Li L.,China University of Petroleum - Beijing | Ma Y.,China University of Petroleum - Beijing | And 2 more authors.
Petroleum Science | Year: 2014

Pyrolysis characteristics of a North Korean oil shale and its pyrolysates were investigated in this paper. The pyrolysis experiments were conducted below 600 °C at a heating rate of 10, 15, 20 and 25 °C/min, respectively. The kinetics data were calculated using both integral and differential methods with the assumption of first order kinetics. The results show that the averaged oil content of the North Korean oil shale is about 12.1 wt% and its heat value is 13,400 kJ/kg. The oil yields at different retorting temperatures show that the higher the retorting temperature the greater the oil and retorting gas yields. The optimal retorting temperature for the North Korean oil shale is about 500 °C. The properties of the North Korean shale oil including density, viscosity, flash point and freezing point are found to be relatively low compared with those of shale oil from FuShun, China. The gasoline fraction, diesel fraction and heavy oil fraction account for 11.5 wt%, 41.5 wt% and 47 wt%, respectively. The major pyrolysis gases are CH4 (the most abundant), H2, CO2, H2S, CO, and C2-C5 hydrocarbons. The heat value of retorting gas is more than 900 kJ/mol, and the retorting gas has high sulfur content. © 2014 The Authors.


Tang X.,China University of Petroleum - Beijing | Li S.,China University of Petroleum - Beijing | Yue C.,China University of Petroleum - Beijing | He J.,Shandong Energy Longkou Mining Group Co. | Hou J.,China University of Petroleum - Beijing
Oil Shale | Year: 2013

The hydrogenation experiments of the middle distillate (MD) of Chinese Huadian shale oil were carried out in a bench-scale trickle-bed reactor using a commercial catalyst Ni-Mo-W/Al2O3 under various operating conditions. Three kinds of lumping kinetic models were developed in order to compare their capabilities to predict the concentrations of sulfur and nitrogen in hydrotreated oil samples. The results showed that three-lump and four-lump models can be reasonably used to describe hydrodesulfurization (HDS) and hydrodenitrogenation (HDN), respectively. The predictions made using lumping models agreed well with experimental data. The discrepancies between experimental and predicted data are smaller than 5%. The three-lump model for HDS and the four-lump model for HDN were also utilized for predicting reactive features and obtaining suitable operating conditions for HDS and HDN of the middle distillate (MD) of Huadian shale oil. The species and distribution of sulfur and nitrogen compounds were also investigated. © 2013 Estonian Academy Publishers.

Loading Shandong Energy Longkou Mining Group Co. collaborators
Loading Shandong Energy Longkou Mining Group Co. collaborators