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Advances in direct production of value-added chemicals via syngas conversion

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Science China Chemistry 2017年第7期60卷 887-903页

作者： Yunlei An tiejun lin Fei Yu Yanzhang Yang Liangshu Zhong Minghong Wu Yuhan Sun School of Environmental and Chemical Engineering Shanghai UniversityShanghai 200444China CAS Key Laboratory of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201203China University of the Chinese Academy of Sciences Beijing 100049China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201203China

Syngas conversion to fuels and chemicals is one of the most challenging subjects in the field of C1 chemistry. It is considered as an attractive alternative non-petroleum-based production route. The direct synthesis of olefins and alcohols as high value-added chemicals from syngas has drawn particular attention due to its process simplicity, low energy consumption and clean utilization of carbon resource, which conforms to the principles of green carbon science. This review describes the recent advances for the direct production of lower olefins and higher alcohols via syngas conversion. Recent progress in the development of new catalyst systems for enhanced catalytic performance is highlighted. We also give recommendations regarding major challenges for further research in syngas conversion to various chemicals.

关键词： green carbon science syngas conversion Fischer-Tropsh Fischer-Tropsh to olefins higher alcohol synthesis

Effect of Sodium on the Structure-Performance Relationship of Co/SiO2 for Fischer-Tropsch Synthesis

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Chinese Journal of Chemistry 2017年第6期35卷 918-926页

作者： Yuanyuan Dai Fei Yu Zhengjia Li Yunlei An tiejun lin Yanzhang Yang Liangshu Zhong Hui wang Yuhan Sun CAS Key Laboratory of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research Institute Chinese Academy of Sciences Shanghai 201203 China University of the Chinese Academy of Sciences Beijing 100049 China School of Chemistry and Molecular Engineering East China Normal University Shanghai 200062 China College of Environmental and Chemical Engineering Shanghai University Shanghai 200444 China School of Physical Science and Technolog.v Shanghai Tech University Shanghai 201203 China

A series of Co/SiO2 catalysts with different sodium （Na）loadings （0, 0.1, 0.2, 0.5 and I wt%） were prepared and evaluated for Fischer-Tropsch reaction to study the effect of Na on the catalyst structure and catalytic performance. The addition of Na was found to decrease the catalytic activity and hydrocarbon selectivity, but increase CO2 selec- tivity due to the enhanced WGS activity. The addition of Na also resulted in higher selectivity to oxygenates （alco- hols and aldehydes） and O/P ratio as well as the shift of hydrocarbons to lower carbon numbers. Structure charac- terization revealed a decrease in the surface area and particles size for the calcined samples with the addition of Na. CozC was formed during the reaction process for the Na-promoted catalysts. As a result, a new Co/Co2C bifunc- tional active sites were generated for oxygenates formation leading to increasing oxygenates selectivity. In addition, the Co2C nanoparticles alone may also act as dual active sites for oxygenate formation at high reaction pressure over the promoted catalysts with high Na loading.

关键词： Fischer-Tropsch synthesis structure-performance relationship sodium cobalt carbide oxygenates

Study on the fluid flow rule of five-cylinder plunger pump hydraulic end

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Petroleum 2018年第4期4卷 457-465页

作者： Zhanghua Lian Yang Liu tiejun lin Li Li Zhongqing Lei Chuanjun Han State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation Southwest Petroleum University610500PR China Institute of Technology CNPC Xinjiang Oil Company834000PR China Engineering Technology Research Institute CNPC Bohai Drilling Engineering Company LimitedTianjin300280PR China

The change of velocity and pressure of flow field in suction and discharge chamber of five-cylinder plunger pump obtained by CFD under maximum and minimum stroke,the results show that:when the stroke is 79 rpm,the internal of pump head will produce pressure holding,and the internal organization of pump head body will be in a fatigue state of high pressure for a long *** the rotate angle is small,the peak velocity at the gap of valve disc and valve seat reaches 9.60m/s,which is the orifice jet *** the stroke is 299 rpm,the overall velocity curve is relatively stable,but the velocity of fluid flow through the pump head body is larger,and the maximum velocity reaches 18.72 m/s at the bottom corner of valve,it will produce the circumfluence and vortex discharge chamber at the same time,which will cause the increase of vibration of pump head *** it should use proper punching gear in order to conducive to overall working life of pump.

关键词： Five-cylinder plunger pump Pressure holding Orifice jet Vibration

MIMO Capacity Bounds with Doubly Correlated Rician Channel in Geometrical Channel Model

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China Communications 2010年第5期7卷 9-13页

作者： Li Yonghua He Zhiqiang Lv tiejun lin Jiaru Key Laboratory of Universal Wireless Comunications Ministry of Education Beijing University of Posts and Telecommunications Beijing 100876 P. R. China

MIMO system can provide higher capacity in independent conditions. When the spatial-temporal fading correlation exists, the capacity may decrease. In this paper, the geometrical MIMO channel model is presented with Rician factor. Based on the MIMO ergodic capacity, the capacity bounds are derived with arbitrary finite number of antennas. The bounds are derived in the exact expressions in doubly correlated MIMO R/clan channel. Then a simple expression for the capacity bounds is attained for the high SNR. Finally, the tightness of derived bounds is verified by Monte Carlo simulation.

关键词： MIMO Rician capacity bounds

Regulating crystal phase of TiO_(2) to enhance catalytic activity of Ni/TiO_(2) for solar-driven dry reforming of methane

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燃料化学学报（中英文） 2024年第9期52卷 1203-1213页

作者： HE Zhanjun GONG Kun DAI Yuanyuan NIU Qiang lin tiejun ZHONG Liangshu Key Laboratory of Low-Carbon Conversion Science and Engineering Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201210China University of Chinese Academy of Sciences Beijing 100049China National Enterprise Technology Center Inner Mongolia Erdos Electric Power and Metallurgy Group Co.LtdOrdos 016064China

Ni/TiO_(2) catalyst is widely employed for photo-driven DRM reaction while the influence of crystal structure of TiO_(2) remains *** this work,the rutile/anatase ratio in supports was successfully controlled by varying the calcination temperature of anatase-TiO_(2).Structural characterizations revealed that a distinct TiO_(x) coating on the Ni nanoparticles(NPs)was evident for Ni/TiO_(2)-700 catalyst due to strong metal-support *** is observed that the TiOx overlayer gradually disappeared as the ratio of rutile/anatase increased,thereby enhancing the exposure of Ni active *** exposed Ni sites enhanced visible light absorption and boosted the dissociation capability of CH4,which led to the much elevated catalytic activity for Ni/TiO_(2)-950 in which rutile ***,the catalytic activity of solar-driven DRM reaction was significantly influenced by the rutile/anatase ***/TiO_(2)-950,characterized by a predominant rutile phase,exhibited the highest DRM reactivity,with remarkable H_(2) and CO production rates reaching as high as 87.4 and 220.2 mmol/(g·h),*** rates were approximately 257 and 130 times higher,respectively,compared to those obtained on Ni/TiO_(2)-700 with *** study suggests that the optimization of crystal structure of TiO_(2) support can effectively enhance the performance of photothermal DRM reaction.

关键词： dry reforming of methane photothermal catalysis crystal phase TiO_(2) metal-support interaction

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高压高产气井油管柱特殊螺纹密封动力学研究

中国石油大学学报（自然科学版） 2020年第3期44卷 134-140页

作者：张颖练章华周谧林铁军四川轻化工大学机械工程学院四川自贡643000 西南石油大学油气藏地质及开发工程国家重点实验室四川成都610500

针对高产气井中油管柱振动问题建立特殊螺纹接头密封面在动载荷作用下接触应力的力学模型。分析密封面接触应力、密封球面半径、密封面表面摩擦系数对特殊螺纹密封性能的影响。针对油管柱的高频振动,提出特殊螺纹密封面之间将会产生微... 详细信息

针对高产气井中油管柱振动问题建立特殊螺纹接头密封面在动载荷作用下接触应力的力学模型。分析密封面接触应力、密封球面半径、密封面表面摩擦系数对特殊螺纹密封性能的影响。针对油管柱的高频振动,提出特殊螺纹密封面之间将会产生微振磨损,并基于能量耗散模型,分析不同螺纹锥度情况下,振荡载荷对油管柱接头能量耗散的影响。结果表明:公接头密封球面半径越小,接触应力越集中,接触应力也就越大,密封接触宽度也越小;同时,螺纹密封面锥度越小,密封面能量耗散值也越小,而当密封面锥度小于11°时能量耗散几乎与锥度无关;建议在高压高产气井中,应适当减小特殊螺纹密封面锥度,且密封面结构优先采用锥面对锥面密封结构形式,其次采用球面对锥面结构。

关键词：高产气井特殊螺纹振动密封性能动力学

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光热催化甲烷干重整研究进展

物理化学学报 2023年第9期39卷 22-34页

作者：何展军黄敏林铁军钟良枢中国科学院上海高等研究院中科院低碳转化科学与工程重点实验室上海201210 中国科学院大学北京100049 上海科技大学物质科学与技术学院上海201210

随着工业化的推进,化石能源的消耗产生大量温室气体,其中CH_(4)和CO_(2)占据温室气体排放的98%以上。将CH_(4)和CO_(2)转化为高附加值化学品具有重要的意义,一直受到工业界和学术界广泛关注。传统的热催化甲烷干重整(DRM)可实现将CH_(4)... 详细信息

随着工业化的推进,化石能源的消耗产生大量温室气体,其中CH_(4)和CO_(2)占据温室气体排放的98%以上。将CH_(4)和CO_(2)转化为高附加值化学品具有重要的意义,一直受到工业界和学术界广泛关注。传统的热催化甲烷干重整(DRM)可实现将CH_(4)和CO_(2)转化为合成气,但该反应过程受热力学限制,需要很高的能量输入,并且由于反应温度较高,催化剂易发生积碳而失活。绿色环保的光催化技术可以使甲烷干重整反应在温和条件下进行,但是存在太阳光利用率和反应转化率较低等问题。最近光热协同催化受到学术界广泛关注。许多研究结果表明,在相对温和的条件下,光热催化DRM可以获得良好的催化效果,可有效实现太阳能转化为化学能。本文简要介绍近期光热催化甲烷干重整反应的研究进展,总结不同金属催化剂在光热催化甲烷干重整中的应用,同时提出了光热催化甲烷干重整存在的一些挑战及展望。

关键词：甲烷干重整光热催化 LSPR 金属基催化剂

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Effect of the support on cobalt carbide catalysts for sustainable production of olefins from syngas

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Chinese Journal of Catalysis 2018年第12期39卷 1869-1880页

作者： Xinxing Wang Wen Chen tiejun lin Jie Li Fei Yu Yunlei An Yuanyuan Dai Hui Wang Liangshu Zhong Yuhan Sun CAS Key Laboratory of Low‐Carbon Conversion Science and Engineering Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201203China University of Chinese Academy of Sciences Beijing 100049China School of Physical Science and Technology ShanghaiTech UniversityShanghai 201203China

Co2C‐based catalysts with SiO2,γ‐Al2O3,and carbon nanotubes(CNTs)as support materials were prepared and evaluated for the Fischer‐Tropsch to olefin(FTO)*** combination of catalytic performance and structure characterization indicates that the cobalt‐support interaction has a great influence on the Co2C morphology and catalytic *** CNT support facilitates the formation of a CoMn composite oxide during calcination,and Co2C nanoprisms were observed in the spent catalysts,resulting in a product distribution that greatly deviates from the classical Anderson‐Schulz‐Flory(ASF)distribution,where only 2.4 C%methane was *** Co3O4 phase for SiO2‐andγ‐Al2O3‐supported catalysts was observed in the calcined *** reduction,CoO,MnO,and low‐valence CoMn composite oxide were generated in theγ‐Al2O3‐supported sample,and both Co2C nanospheres and nanoprisms were identified in the corresponding spent ***,only separated phases of CoO and MnO were found in the reduced sample supported by SiO2,and Co2C nanospheres were detected in the spent catalyst without the evidence of any Co2C *** Co2C nanospheres led to a relatively high methane selectivity of 5.8 C%and 12.0 C%of theγ‐Al2O3‐and SiO2‐supported catalysts,*** results suggest that a relatively weak cobalt‐support interaction is necessary for the formation of the CoMn composite oxide during calcination,which benefits the formation of Co2C nanoprisms with promising catalytic performance for the sustainable production of olefins via syngas.

关键词： Fischer‐Tropsch to olefins Cobalt carbide Supported catalyst Olefin Syngas

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刑事侦查中秘密拍照手段法制化研究

中国刑事法杂志 2005年第5期 85-89页

作者：樊学勇林铁军中国人民公安大学

秘密拍照是一种广泛应用于各国侦查实践中的技术侦查手段。由于其自身具有的秘密性、紧迫性、广泛性等特点,在侦查实践中若是运用不当就会不同程度上侵犯犯罪嫌疑人及相关人员的肖像权、住宅权和隐私权。我们应当借鉴他国经验并结合我... 详细信息

秘密拍照是一种广泛应用于各国侦查实践中的技术侦查手段。由于其自身具有的秘密性、紧迫性、广泛性等特点,在侦查实践中若是运用不当就会不同程度上侵犯犯罪嫌疑人及相关人员的肖像权、住宅权和隐私权。我们应当借鉴他国经验并结合我国的侦查实践,完善我国秘密拍照的立法,从而加强秘密拍照中的人权保护。

关键词：秘密拍照技术侦查人权保护秘密性拍照刑事侦查法制化侦查实践犯罪嫌疑人侦查手段相关人员人权保护