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The 4th Joint China/Japan Chemical Engineering Symposium

作者： Qinghua Liu Chun Xia Ye Tian yongdan litianjin key laboratory of applied catalysis science and technology School of Chemical Engineering and technology Tianjin University Tianjin 300072 China

A variety of fuel cells such as molten carbonate fuel cell （MCFC）, solid oxide fuel cell（SOFC）, have been developed for a number of years and now are close to commercial ***, the direct carbon fuel cell （DCFC） is in the beginning stage of development. DCFCemploys an electrochemical process in which carbon fuel is converted to electricity. Compared withhydrogen fuel cell, DCFC has several advantages that include: The theoretical efficiency of a DCFCis 100%, while that of a hydrogen fuel cell is only 70%. Because the chemical potentials of the solidcarbon and the product CO2 do not change during consumption of the fuel, the EMP is *** CO2 is the only product at the anode ready for sequestration. And solid C fuel is notexplosive. This work focuses on a novel DCFC working model with detailed thermodynamic and electrodeprocesses description. All of the performance related parameters of DCFC, such as anode exchangecurrent density, resistivity of components, etc., are expressed as a function of temperature. Thecontribution of different cell components to cause the losses in cell performance has beeninvestigated. It was recognized that the anode activation overpotential plays a limiting role indetermining the cell performance. Moreover, the activation overpotential and the maximum powerdensity of a single cell for different anodes in different electrolyte are determined by this *** activation overpotential can be reduced with the increase of temperature. The first law and thesecond law efficiencies for DCFC are around 0.80 and 0.70 at the temperature range from 923.15 Kto 1023.15 K.

关键词： Direct carbon fuel cell First and second law efficiencies Carbon Modeling

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PRESSURE DROP ACROSS A FIXED BED REACTOR WITH MECHANICAL FAILURE OF CATALYST PELLETS DESCRIBED BY SIMPLIFIED ERGUN'S EQUATION

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Particuology 2005年第Z1期 23-25+4页

作者： Dong Zhang, Panfeng Fan, Dongfang Wu and yongdan Li Department of catalysis science and technology and Tianjin key laboratory of applied catalysis science & technology, School of Chemical Engineering, Tianjin University, Tianjin 300072, P. R. China

The pressure drop across a laboratory-scale catalyst packed bed with mechanical failure of catalyst pellets has been examined. It was found that the increased pressure drop can be described by a simplified model deduc... 详细信息

关键词： solid catalyst packing mechanical failure bulk crushing strength pressure drop

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A high H_2 evolution rate under visible light of a CdS/TiO_2@Ni S catalyst due to a directional electron transfer between the phases

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Chinese Journal of Chemical Engineering 2019年第3期27卷 544-548页

作者： Jianling Meng yongdan Li School of Material and Chemical Engineering Tongren University Tianjin key laboratory of applied catalysis science and technology State Key Laboratory for Chemical Engineering School of Chemical Engineering Tianjin University

The photocatalytic activity of CdS can be greatly improved by co-modification of NiS and TiO_2 materials; furthermore the order of connection affects much. A directional electron transfer route via CdS → TiO_2→ NiS is found crucial to the enhancement of ternary catalyst, where TiO_2 acts as an electron reservoir and Ni S works as an effective cocatalyst. Cd S/TiO_2@Ni S with Ni S loaded on TiO_2 has an activity of H_2 evolution 2.5 times higher than NiS@Cd S/TiO_2 with Ni S pre-loaded on Cd S. Faster e-/h+separation rates is obtained of Cd S/TiO_2@Ni S under visible light than under extra UV light irradiation, which in turn demonstrates the importance of directional electron transfer route.

关键词： Directional electron transfer Photocatalysis Hydrogen Visible light

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Insight into SO_(2) poisoning and regeneration of one-pot synthesized Cu-SSZ-13 catalyst for selective reduction of NO_(x) by NH_(3)

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Chinese Journal of Chemical Engineering 2022年第6期35卷 184-193页

作者： Xin Yong Hong Chen Huawang Zhao Miao Wei Yingnan Zhao yongdan Li School of Environmental Engineering Tianjin UniversityTianjin 300072China Collaborative Innovation Center of Chemical science and Engineering(Tianjin) Tianjin Key Laboratory of Applied Catalysis Science and TechnologyState Key Laboratory of Chemical Engineering(Tianjin University)School of Chemical EngineeringTianjin UniversityTianjin 300072China Department of Chemical and Metallurgical Engineering School of Chemical EngineeringAalto UniversityEspoo 02150Finland

The effects of SO_(2) on an one-pot synthesized Cu-SSZ-13 catalyst for selective reduction of NO_(x) by NH_(3) were *** addition of SO_(2) inhibited NO_(x) conversion significantly below 300℃,while no effect on NO_(x) conversion was observed above 300℃.TGA,TPD,and XPS results showed that the deactivation was caused by the formation of(NH4)2SO_(4),SO_(2) chemisorption on the isolated Cu^(2+)ion sites,as well as the formation of CuSO_(4)-like *** them,the site-blocking effect of(NH_(4))_(2)SO_(4) on Cu^(2+)was the primary reason for ***,89%of deNO_(x) activity of the poisoned catalyst was recovered after thermal treatment at 500℃ in air,where(NH_(4))_(2)SO_(4) was completely *** activity was further recovered with regeneration temperature increasing to 600℃,removing the adsorbed SO_(2) on the Cu^(2+)*** regeneration at 600℃ could not recover the activity completely,because of the high stability of CuSO_(4)-like species.

关键词： Emission control SCR One-pot synthesis of Cu-SSZ-13 SO_(2)poisoning Activity regeneration

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