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Wang H.,Tsinghua University | Cao T.,Tsinghua University | Shi Y.,Tsinghua University | Cai N.,Tsinghua University | Yuan W.,Shenhua Ningxia Coal Industry Group Co.
Energy | Year: 2014

A liquid antimony (Sb) anode DCFC (direct carbon fuel cell) is fabricated on a smooth single crystal YSZ (Yttria Stabilized Zirconia) electrolyte substrate with porous Pt cathode to reveal the intrinsic reaction kinetics of electrochemical oxidation of liquid Sb and the reduction reaction characteristics of Sb2O3 with the reaction mass-produced Taixi de-ash coal fuel. The reduction kinetics of Sb2O3 with the de-ash coal is obtained using a temperature programmed reaction testing system. The reaction kinetics of the Sb2O3 with the de-ash coal can be enhanced by decreasing the coal particle size, and by adding de-ash coal into the anode chamber. The Sb2O3 accumulation at the interface between anode and electrolyte lead to the increase of ohmic resistance. While effective reaction active sites increase when the mole content of oxygen ion conductor Sb2O3 increase at the earlier stage of the cell discharging processes which further decrease the electrode polarization. The Si and Fe in the ash possibly accumulate at the interface between anode and electrolyte. © 2014.


Wang H.,Tsinghua University | Shi Y.,Tsinghua University | Yuan W.,Shenhua Ningxia Coal Industry Group Co. | Cao T.,Tsinghua University | And 2 more authors.
ECS Transactions | Year: 2013

A liquid Sb anode direct carbon fuel cell (DCFC) was fabricated on a smooth single crystal YSZ electrolyte (Ra=0.67nm) substrate with porous Pt cathode to reveal the intrinsic reaction kinetics of electrochemical oxidation of liquid Sb in battery mode and the reduction characteristic of Sb2O3 in carbon fuel mode using Taixi de-ash coal. The reduction kinetics of Sb2O3 with the de-ash coal was obtained using a temperature programmed reaction testing system. The intrinsic exchange current density of the liquid Sb anode is 15A m-2. The reaction kinetics of the Sb2O3 with the deash coal can be enhanced by decreasing the coal particle size, and by adding de-ash coal into the anode chamber, the performance can be improved and kept stable. Since Sb2O3 is an oxygen ion conductor, the performance can be enhanced in the beginning. The distribution of Sb/Sb 2O3 at the anode has important effects on the liquid Sb DCFC performance. © The Electrochemical Society.


Yang Z.-M.,Xi'an University of Science and Technology | Zhang J.-H.,Xi'an University of Science and Technology | Zhang J.-H.,Shenhua Ningxia Coal Industry Group Co. | Lai X.-P.,Xi'an University of Science and Technology | Lu Z.-H.,Shenhua Ningxia Coal Industry Group Co.
Meitan Xuebao/Journal of the China Coal Society | Year: 2010

Taking the safe mining of the water-rich working face at Qingshuiying Coal Mine as a goal, adopted methods of the geophysical prospecting, theoretical analysis, in-situ monitor and mining practice to reveal the evolution mechanism of the complicated super-thick seam steeply inclined and large mining height working face overlying strata load's localized and asymmetric gradual expansion to the roof. The local stress of the working face is obviously concentrated, forepoling pressure's influence scale is narrowed, periodic weighting length is 10~15 m, and strata development at goaf is obvious variability.


Yao M.,Xi'an University of Science and Technology | Yao M.,Shen Hua Ningxia Coal Industry Group Co. | Hu S.,China National Petroleum Corporation | Wang J.,Shen Hua Ningxia Coal Industry Group Co. | And 2 more authors.
Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica | Year: 2012

Catalytic conversion of methanol to propylene (MTP) by HZSM-5 zeolite is of great importance in industrial applications. In this paper, a series of HZSM-5 zeolites with different crystal sizes were synthesized by adjusting the initial gel composition, crystallization temperature, and crystallization time. The crystal structure, size, morphology, pore structure, and acidity of HZSM-5 were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen adsorption, and temperature-programmed desorption of ammonia (NH 3-TPD). The catalytic activity and stability of HZSM-5 with different crystal sizes for MTP were evaluated on a continuous flowing fixed-bed reactor. Coke deposited on HZSM-5 was analyzed by thermogravimetric (TG) analyzer. Results indicated that with smaller crystal size, HZSM-5 zeolite had larger surface area and pore volume, higher density of pore openings, and shorter path length of micropore channels that prevent side reactions. For MTP reaction, smaller crystal sizes of HZSM-5 showed a higher resistance and better tolerance to coke, and longer catalytic lifetime. The lowering of both the total and strong acidity on HZSM-5 with smaller crystal size favored a higher selectivity of target product, propylene. © Editorial office of Acta Physico-Chimica Sinica.


Wang J.,Shenhua Ningxia Coal Industry Group Co. | Liu Z.,Xi'an Jiaotong University | Wang S.,Xi'an Jiaotong University
Proceedings - 2014 7th International Joint Conference on Computational Sciences and Optimization, CSO 2014 | Year: 2014

Shale gas is a new kind of unconventional gas and can be used with a environmental acceptable way with high energy efficiency. The large-scale development of shale gas in china will contribute to energy structure referring both in supply and demand as well as promoting the extent of carbon emission reduction. However, because of special technique used in the process of shale gas development, environmental concerns gain much attention. It reported that practice of shale gas development can partly do harm to local air (atmospheric environment), water body environment, geology and ecological environment. Therefore, there is absolute negative impact of shale gas development on the environmental quality. To this point, shale gas development in china is facing opportunity and challenge. © 2014 IEEE.


Zhang J.,Zhejiang Pharmaceutical College | Yong X.,Shenhua Ningxia Coal Industry Group Co. | Zhao D.,Zhejiang Pharmaceutical College | Shi Q.,Zhejiang Pharmaceutical College
Journal of AOAC International | Year: 2015

The content of mononuclear Al (Ala%) changed with its determination time (ta) under different dosages of Ferron (7-iodo-8-hydroxyquinoline-5-sulfonic acid, [Ferron]), and the change of Ala% with [Ferron] at different ta was systematically investigated for the first time. Thus, the most appropriate ta was found with the optimal [Ferron]. Also, the judgment of the platform (flat or level portion) of the complete reaction on the absorption-time curve determined in the hydroxyl polyaluminum solution by Ferron timed spectrophotometry (Ferron assay) was first digitized. The time point (tb) of complete reaction between the medium polyaluminum (Alb) and Ferron reagent depended on the reaction extent, and time could not be used only to judge. Thus, the tb was accurately determined and reduced to half of original, which improved the experiment efficiency significantly. The Ferron assay was completely optimized.


The global methanol market is characterized by the strong presence of a handful of regional companies with an established customer base in various countries. These include Petroliam Nasional Berhad (PETRONAS), Reliance Industries Limited, AR-RAZI Saudi Methanol Company, RAMA Petrochemicals Ltd., Shenhua Ningxia Coal Industry Group Co. Ltd., and Gujarat Narmada Valley Fertilisers & Chemicals Limited. Transparency Market Research notes that the market dynamics are increasingly dependent on long-term contracts, the goodwill of companies, and a strong and unique product portfolio. Focusing on developing new projects and alliances is also a key growth strategy adopted by leading players in the methanol market. For instance, the acquisition of Ningdong Power, Xuzhou Power, and Zhoushan Power by Shenhua Ningxia Coal Industry Group Co. Ltd. in 2015 was a business merger that strengthened the company's presence in the local as well as global market. By application, formaldehyde accounted for the dominant share of 29.6% in the global methanol market in 2015, followed by acetic acid. However, the market share of this segment is expected to decrease during the forecast period. On the other hand, DME and gasoline have been identified as immensely lucrative application segments and both are likely to register a 4.8% CAGR from 2016 to 2024. From a geographical standpoint, Asia Pacific dominates the global methanol market and accounted for a share of just under 70.0% in 2015. The region is also expected to be an attractive investment opportunity for players in the methanol market and is likely to expand at a CAGR of 3.9% between 2016 and 2024 in terms of volume. The global market for methanol has been witness to several dramatic changes in the recent past, most of which have had a positive impact on its growth. One of the most influential developments in this market has been China's emergence as a dominant contributor to its revenue and demand. "China's explosive economic growth and the rapid development of its methanol market has resulted in a significant increase in the global methanol demand and capacity," the author states. China presently accounts for nearly half the global production of methanol and its capacity is only set to increase in the coming years. The country's contribution in the production of coal-based methanol as an alternative to the natural gas-based variant is also noteworthy and is anticipated to drive the global market. Get Industry Research Report Sample for more Professional and Technical Industry Insights: http://www.transparencymarketresearch.com/sample/sample.php?flag=S&rep_id=1249 Another factor that is sure to benefit the global methanol market is the recovery of the U.S. methanol industry. "The production of methanol had been strong in the U.S. until the mid-2000s; the market, however, took a severe hit owing to high gas prices. Methanol plants across the U.S. and Canada shut down in a couple of years and the overall market reached a point of being unprofitable," the lead analyst explains. However, the ready availability of shale-derived feedstock has since boosted U.S.'s ability to produce methanol once again. So much so, that analysts expect the country to become a key exporter of methanol in the coming years. New production plants have sprouted across the region and are hinting at the re-emergence of a driven market. This review is based on the findings of a TMR report titled "Methanol Market - Global Industry Analysis, Size, Share, Growth, Trends, and Forecast 2016 - 2024." Transparency Market Research (TMR) is a market intelligence company, providing global business information reports and services. Our exclusive blend of quantitative forecasting and trends analysis provides forward-looking insight for thousands of decision makers. TMR's experienced team of analysts, researchers, and consultants, use proprietary data sources and various tools and techniques to gather, and analyze information. Our business offerings represent the latest and the most reliable information indispensable for businesses to sustain a competitive edge. Each TMR syndicated research report covers a different sector - such as pharmaceuticals, chemicals, energy, food & beverages, semiconductors, med-devices, consumer goods and technology. These reports provide in-depth analysis and deep segmentation to possible micro levels. With wider scope and stratified research methodology, TMR's syndicated reports strive to provide clients to serve their overall research requirement.


Wang F.,Shenhua Ningxia Coal Industry Group Co. | Yan S.-J.,Shenhua Ningxia Coal Industry Group Co. | Yong X.-J.,Shenhua Ningxia Coal Industry Group Co. | Luo C.-T.,Shenhua Ningxia Coal Industry Group Co. | And 4 more authors.
Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica | Year: 2013

The effects of Na+ in dilution steam and coke deposition on the physicochemical properties and catalytic performance of ZSM-5 catalysts for the methanol-to-propylene (MTP) reaction were investigated. The deactivated and regenerated catalysts were characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray fluorescence (XRF) spectrum, nitrogen adsorption/desorption, temperature-programmed desorption of ammonia (NH3-TPD), and thermogravimetry (TG). Their catalytic performance for MTP reaction was tested in a continuous flow fixed-bed micro-reactor at 470 °C, 101325 Pa, and with methanol weight hourly space velocity (WHSV) in the range of 1.0-3.0 h-1. The results indicated that the catalyst crystal structure and morphology was not significantly altered after 970 h on stream. In the MTP reaction, Na+ in the dilution steam can easily enter the pore channels of the catalyst, and partially replace H protons, thereby gradually decreasing the amount of acidity and acid strength of the catalyst, which eventually causes deactivation. In addition, coke deposits on the catalyst surface blocking its micropores are the main reason for deactivation of the MTP catalyst. Coke deposits are mostly eliminated through the burning charcoal regeneration process. The effect of framework dealumination from the catalyst by steam in the MTP process is slow but more serious. Through regeneration and ion exchange process, the catalytic activity of the deactivated catalyst can be fully restored. The conversion of methanol is consistently above 99%, and propylene selectivity is greater than 46% even after 470 h on stream. With increasing reaction time, the propylene selectivity gradually increases, while ethylene selectivity gradually decreases. © Editorial office of Acta Physico-Chimica Sinica.


Zhang W.,Shenhua Ningxia Coal Industry Group Co. | Wang F.,Shenhua Ningxia Coal Industry Group Co. | Yong X.,Shenhua Ningxia Coal Industry Group Co. | Gong Y.,China National Petroleum Corporation
Petroleum Processing and Petrochemicals | Year: 2016

Hierarchical porous ZSM-5 zolites were prepared by direct synthesis and post modification and characterized by means of X-ray diffraction (XRD) , scanning electron microscopy (SEM) , nitrogen adsorption/desorption and temperature-programmed desorption of ammonia (NH3-TPD) techniques. The catalytic cracking performance of the samples was evaluated in a micro fixed-bed reactor. The results indicate that compared with conventional ZSM-5 , the hierarchical porous ZSM-5 zeolites have the advantages in higher surface area, mesoporous volume and ratio of meso/micro. The propylene yield is increased because the mesopores are introduced in the modified sieve, which make the product more easily to diffuse and to effectively suppress the hydrogen transfer reaction. Over the nanolayered NZSM-5- 300 with the highest ratio of meso/micro, the selectivity of ethylene and propylene reaches 15. 8% and 40. 1 % , respectively. The test results indicate that with increase of meso/micro ratio, the sample exhibits better stability and lower deactivation rate as well as longer lifetime.


Wang F.,Shenhua Ningxia Coal Industry Group Co Ltd | Zhang W.,Shenhua Ningxia Coal Industry Group Co Ltd | Yong X.,Shenhua Ningxia Coal Industry Group Co Ltd | Luo C.,Shenhua Ningxia Coal Industry Group Co Ltd
Petroleum Processing and Petrochemicals | Year: 2014

The characteristics and commercial application of Lurgi's methanol-to-propylene (MTP) technology in Shenhua Ningxia Co, Ltd. was introduced. Through the technical improvement and optimization, some of the problems in this process, such as the cavitation of chilling water pump, the over standard Na+ amount in process steam and water in propylene were solved, resulting in improved capacity of the process steam tower and full load operation of the MTP device. But there are still some problems in the process: The complex structure of MTP reactors, the uneven distribution of materials, and the insufficient capacity of the process steam tower. The industrial operation results show that the propylene yield is about 1. 5%-9.8% lower than the designed value, while the yields of liquefied petroleum gas and fuel gas are higher. Gasoline fraction obtained from Lurgi's MTP reaction is characterized by low normal alkane and high aromatic content. The composition of the MTP gasoline is quite different from that of the conventional FCC gasoline. The total life of MTP catalyst is less than 8 000 h, and its regeneration cycles is only about 640-700 h.

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