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Yi Q.,Taiyuan University of Technology | Yi Q.,Train Base Of State Key Laboratory Of Coal Science And Technology Jointly Constructed By Shanxi Province | Li W.,Taiyuan University of Technology | Li W.,Train Base Of State Key Laboratory Of Coal Science And Technology Jointly Constructed By Shanxi Province | And 5 more authors.
Journal of Cleaner Production | Year: 2015

Waste cooking oil (WCO) can be converted into a bio-flotation agent (BFA) which can replace diesel and develop into a new coal flotation agent with the Zr-SBA-15 catalyst. A tech-economic assessment of WCO-to-BFA on the basis of the pilot program showed that compared with petro-diesel, WCO-to-BFA technology can help save energy by 13%, reduce CO2 emission by 76%, and save production costs by 0.003-0.005 USD·MJ-1. WCO-to-BFA technology provided an excellent result regarding BFA substituting diesel as a coal flotation agent, which can lead to reduction of standard coal consumption by 1.2 kg, reduction of CO2 emission by 5.5 kg, reduction of production costs for each ton of coal slime by 0.836 USD in the whole production chain lifecycle that includes the application of WCO-to-BFA technology into coal flotation process. It has proven that the WCO-to-BFA technology is an efficient, economic and environmentally friendly technique which has widespread applications and bright market prospects. © 2015 Elsevier Ltd. All rights reserved. Source


Hao Y.,Taiyuan University of Technology | Hao Y.,Train Base Of State Key Laboratory Of Coal Science And Technology Jointly Constructed By Shanxi Province | Hao Y.,Shanxi University | Huang Y.,Taiyuan University of Technology | And 9 more authors.
Energy Conversion and Management | Year: 2015

Polygeneration system, typically involving chemicals/fuels and electricity co-production, is a promising technology for the sustainable development of energy and environment. In this study, a new polygeneration system based on coal and coke oven gas (COG) inputs for co-production of dimethyl ether (DME)/methanol and electricity is proposed. In the new system, an appropriate syngas for the synthesis of DME is from coal gasified gas (CGG) reforming of COG coupled with an oxygen-permeable membrane reactor, in which both COG and CGG reforming process and fuel combustion process are incorporated, which reduces exergy destruction in the whole reforming process. In order to obtain the best performance of CO2 reduction, energy saving and economic benefit, the key operation parameters of the proposed process are analyzed and optimized. The new system is compared with the process based on CH4/CO2 dry reforming, in terms of exergy efficiency, exergy cost and CO2 emissions. Through the new system, the exergy efficiency can be increased by 7.8%, the exergy cost can be reduced by 0.88 USD/GJ and the CO2 emission can be reduced by 0.023 kg/MJ. These results suggest that the polygeneration system from CGG and COG partial catalytic oxidation coupling with an oxygen-permeable membrane reactor (PL-PCO-OPMR) would be a more attractive way for highly efficient and clean use of CGG and COG. © 2015 Elsevier Ltd. All rights reserved. Source


Zhang L.,Taiyuan University of Technology | Zhang L.,Train Base Of State Key Laboratory Of Coal Science And Technology Jointly Constructed By Shanxi Province | Feng J.,Taiyuan University of Technology | Feng J.,Train Base Of State Key Laboratory Of Coal Science And Technology Jointly Constructed By Shanxi Province | And 7 more authors.
Catalysis Communications | Year: 2015

Ni2Mo3N catalysts with different amounts of potassium were prepared by an impregnation method, and their sulfur tolerance in benzene hydrogenation in the presence of different amounts of thiophene was investigated. The results showed that the lower potassium loading samples (≤ 0.07 wt.% K) improved the sulfur tolerance obviously due to the electronic modifier of potassium, giving rise to an electron enrichment of the Ni phase, decreasing the chances for the formation of Ni-S bonds. At the same time, increasing the reaction temperature resulted in better sulfur tolerance of the un-promoted and potassium-promoted catalysts. © 2015 Elsevier B.V. All rights reserved. Source


Wang Q.,Taiyuan University of Technology | Wang Q.,Train Base Of State Key Laboratory Of Coal Science And Technology Jointly Constructed By Shanxi Province | Li X.,Taiyuan University of Technology | Li X.,Train Base Of State Key Laboratory Of Coal Science And Technology Jointly Constructed By Shanxi Province | And 4 more authors.
Catalysis Communications | Year: 2014

To improve the lattice structure of CeO2 and the transmission capacity of oxygen, Ce1 - xFexO2(x ≤ 0.2)solid solutions were prepared by a hydrothermal method and used in oxidative dehydrogenation of ethylbenzene to styrene with CO2. Ce 1 - xFexO2 solid solutions were characterized by powder X-ray diffraction, Raman spectroscopy, N2-adsorption, H2 temperature-programmed reduction and H2-O2 titration. Results showed that approximately 20% of Fe3 + could dissolve into the CeO2 lattice while portions of Fe2O 3 were highly dispersed on the surface of the Ce 1 - xFexO2 solid solution. The formation of Ce-Fe solid solutions could create more oxygen vacancies to promote the absorption and activation of CO2, which improves the activity of the catalyst and increased ethylbenzene conversion by as much as 13%. © 2014 Elsevier B.V. Source


Song Y.-C.,Taiyuan University of Technology | Song Y.-C.,Train Base Of State Key Laboratory Of Coal Science And Technology Jointly Constructed By Shanxi Province | Ji M.-S.,Taiyuan University of Technology | Ji M.-S.,Train Base Of State Key Laboratory Of Coal Science And Technology Jointly Constructed By Shanxi Province | And 4 more authors.
Energy Sources, Part A: Recovery, Utilization and Environmental Effects | Year: 2015

Co-gasification of coal and biomass is an effective way to utilize coal of low rank to alleviate problems of energy shortage and environmental pollution. In order to investigate the product distribution resulting from the co-gasification of coal and biomass in a fluidized-bed reactor, experiments were conducted at varying biomass ratios, oxygen equivalent ratios, steam/carbon ratios, and also gasification temperatures. With an increase of biomass ratio, the amount of CO and CH4 increased while H2 and CO2 contents decreased. The amount of H2 increased obviously with an increase of gasification temperature ranging from 650 to 1000°C, whereas the CO and CO2 amount decreased. An increase of the steam/carbon ratio was beneficial to promote H2 formation and decrease CO and hydrocarbon compounds. With an increase of the gasification temperature, the steam/carbon ratio and oxygen equivalent ratio can promote the elements with low reaction activity in biomass gasification to be useful gas compositions. Copyright © Taylor & Francis Group, LLC. Source

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