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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. Source


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. Source


Wang Z.,Ministry Province Co cultivated State Key Laboratory Base of Natural Gas Conversion | Wang Z.,Ningxia University | Chen J.,Ministry Province Co cultivated State Key Laboratory Base of Natural Gas Conversion | Chen J.,Shenhua Ningxia Coal Industry Group Co. | And 3 more authors.
Shiyou Xuebao, Shiyou Jiagong/Acta Petrolei Sinica (Petroleum Processing Section) | Year: 2011

Core-shell zeolite composite HZSM-5/Silicalite-1 was synthesized via hydrothermal procedure with continuous stirring, and characterized by XRD, SEM, NH3-TPD and Py-IR. Methylation of toluene with methanol to p-xylene over HZSM-5/Silicalite-1 core-shell zeolites in continuous flow fixed-bed reactor was carried out to evaluate the catalytic activity of HZSM-5/Silicalite-1.It was proved that HZSM-5/Silicalite-1 was really a core-shell zeolite composite with a core of HZSM-5 and a shell of Silicalite-1, and the Silicalite-1 shell reached 86%. A reduction of the acid sites and strength could also be achieved by epitaxial overgrowth of Silicalite-1 on the precursor ZSM-5 crystals, showing that HZSM-5/Silicalite-1 possessed high catalytic activity and the selectivity to p-xylene. The toluene conversion and p-xylene selectivity reached 28.1% and 74.3%, respectively. Source


Wang J.,Shenhua Ningxia Coal Industry Group Co. | Liu Z.,Xian Jiaotong University | Wang S.,Xian 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. Source


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. Source

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