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海洋重力仪的格值校正方法研究

海洋科学进展 2025年第1期43卷 179-187页

作者：马龙刘晨光鄢全树邢健张连伟自然资源部第一海洋研究所山东青岛266061 同济大学海洋与地球科学学院上海200092 青岛市海底声学探测技术与应用重点实验室山东青岛266061 自然资源部东海调查中心上海200137 国家海洋信息中心天津300171

作为海洋地球物理调查的关键设备,海洋重力仪除受外界环境及现场操作人员水平等因素影响会引起各种系统和偶然误差外,在设备使用过程中,重力仪本身的格值往往也会发生变化。本文以重力仪往返启航/返航港且中途停靠补给港的重力数据资料... 详细信息

作为海洋地球物理调查的关键设备,海洋重力仪除受外界环境及现场操作人员水平等因素影响会引起各种系统和偶然误差外,在设备使用过程中,重力仪本身的格值往往也会发生变化。本文以重力仪往返启航/返航港且中途停靠补给港的重力数据资料为基础数学模型,建立观测重力值的误差补偿校正模型,以对观测重力值进行误差补偿,并基于补偿后的重力观测值与绝对重力值的对应关系来计算格值。在此基础上采用多次迭代的方式逐步优化并求得更新后的格值,直至相邻两次迭代所得到的格值K的差值绝对值小于允许误差为止,进而得到校正后的格值。此方法可消除由格值误差引起的系统误差,并获得高精度的航次调查成果数据,对海洋地球物理调查,尤其是大洋航次的海洋重力测量具有实际应用价值。

关键词：海洋重力仪格值校正迭代计算系统误差校正

Deep Hydrodesulfurization of Diesel Fuel over Diatomite-dispersed NiMoW Sulfide Catalyst

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China Petroleum Processing & Petrochemical Technology 2013年第4期15卷 38-43页

作者： liu Di liu chenguang College of Chemical and Environmental Engineering Shandong University of Science and Technology State Key Laboratory of Heavy Oil Processing Key Laboratory of Catalysis CNPC China University of Petroleum

Diatomite-dispersed NiMoW catalyst was prepared and characterized,and the activity of catalyst samples was tested during the HDS reaction of FCC *** compounds in the feedstock and the hydrogenated products obtained over different catalysts were determined by *** test results showed that the diatomite-dispersed NiMoW catalyst had high hydrodesulfurization activity for FCC diesel,which could be contributed to the excellent hydrogenation performance of the said *** of catalyst by TEM and XRD indicated that the diatomite-dispersed NiMoW catalyst possessed higher layer stacking,larger curvature of MoS2or WS2,and segregated Ni3S2crystals relative to the supported *** kind of structure leads to high hydrogenation activity of the diatomite-dispersed NiMoW catalyst.

关键词： NiMoW catalyst diatomite hydrodesulfurization FCC diesel GC-PFPD

Ultra-deep desulfurization by reactive adsorption desulfurization on copper-based catalysts

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Journal of Energy Chemistry 2019年第2期28卷 8-16页

作者： Yaqing liu Hongying Wang Jinchong Zhao Yunqi liu chenguang liu State Key Laboratory of Heavy Oil Processing Key Laboratory of CatalysisChina National Petroleum Corporation (CNPC)China University of Petroleum

In this paper,a novel copper-based catalyst for FCC gasoline improving the ability of removal the sulfur and avoiding the loss of the octane number from olefin saturation by reactive adsorption desulfurization(RADS) was *** series of Cu/Zn O-Al_2 O_3 catalysts were characterized by X-ray powder diffraction(XRD),N_2 adsorption analysis and temperature-programmed reduction(TPR) studies,X-ray photoelectron spectroscopy(XPS),scanning electron microscope(SEM) and transmission electron microscopy(TEM).The experiment results showed that the catalysts had an optimum desulfurization ability with copper loading 6 wt%,which the sulfur contents of product decreased less than 10 μg/g and olefin contents decreased from 16.19% to 14.14% for the long period *** appropriate Cu loading content could lead to the high active and low apparent activation energy(E_a).Therefore,the Cu-based catalyst may become a novel catalyst for second-generation for reactive adsorption desulfurization,which achieves the high desulfurization active and low olefins saturation to satisfy the upgrading the product.

关键词： Cu/ZnO-Al2O3 Desulfurization activity Octane number Olefins saturation Stability

Synthesis, characterization and hydrodesulfurization activity of silica-dispersed NiMoW trimetallic catalysts

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Journal of Natural Gas Chemistry 2010年第5期19卷 530-533页

作者： Di liu Lihua liu Guangci Li chenguang liu State Key Laboratory of Heavy Oil Processing Key Laboratory of Catalysis CNPC China University of Petroleum Qingdao 266555 Shandong China

Silica-dispersed NiMoW trimetallic hydrodesulfurization catalysts were prepared by deposition-precipitation method. For comparative pur- poses, bulk NiMoW trimetallic catalysts were obtained by co-precipitation. Silica was employed to disperse active metals for full utilization of active components and silica-dispersed NiMoW catalyst had high active metal content. BET analysis showed that silica-dispersed NiMoW trimetallic catalysts had a high surface area （165.1 m2/g） and pore volume （0.27 ml/g）. Transmission electron microscopy results proved that active components were well dispersed. Hydrodesulfurization activity of silica-dispersed NiMoW catalysts was much higher than that of comparative catalysts and up to twice greater than those of commercial NiMo alumina-supported systems per gram of catalyst.

关键词： hydrodesulfurization NiMoW SiO2 gel surface area

Weakening internal diffusion effect in selective hydrodesulfurization of FCC gasoline by novel designed eggshell CoMoS/Al_2O_3 catalysts

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Journal of Natural Gas Chemistry 2012年第2期21卷 194-199页

作者： Bin liu Yongming Chai Yajing Wang Yunqi liu chenguang liu State Key Laboratory of Heavy Oil Processing Key Laboratory of CatalysisChina National Petroleum Corp.(CNPC)China University of Petroleum(East China)Qingdao 266555ShandongChina

A simple method for preparation of presulfided eggshell CoMoS/γ-Al2O3 catalysts with sharp boundary is developed, through which the eggshell thicknesses of Co and Mo could be easily regulated by controlling the impregnation time. According to the results characterized by EDS, XRD, HRTEM and FT-IR of adsorbed CO, the active component structures, the nature and/or the amount of active sites on the eggshell catalyst are similar to these on the uniform catalyst. The evaluation results of the catalytic performance in selective hydrodesulfurization （HDS） of FCC gasoline show the presence of significant internal diffusion inhibition effect on HDS of S-compounds especially in the uniform catalyst. Compared with uniform catalyst, the eggshell catalyst could remarkably reduce such an internal diffusion inhibition effect due to a shortened diffusion path of the reactants, thus showing higher HDS activity and selectivity.

关键词： CoMoS/γ-Al2O3 eggshell catalyst uniform catalyst internal diffusion hydrodesulfurization

Principal basis analysis in sparse representation

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Science China(Information Sciences) 2017年第2期60卷 199-201页

作者： Hong SUN Chengwei SANG chenguang liu School of electronic Information Wuhan University Department Signal and Image Processing Telecom ParisTech Department of Scientific Research Air Force Early Warning Academy

We propose a principal basis analysis(PBA)method over a learned overcomplete basis set(called dictionary).The proposed PBA makes use of a novel criterion:the frequency of basis vector(atom of the dictionary)over a data *** proposed criterion is well adapted to sparse signal *** it adapts to an intrinsic characteristic of the regularity of signals.

关键词： PSNR Figure PBA SAR

Reactive adsorption of thiophene on Ni/ZnO adsorbent:Effect of ZnO textural structure on the desulfurization activity

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Journal of Natural Gas Chemistry 2010年第3期19卷 327-332页

作者： Jingcheng Zhang Yunqi liu Shuang Tian Yongming Chai chenguang liu State Key Laboratory of Heavy Oil Processing Key Laboratory of Catalysis CNPC China University of Petroleum Qingdao 266555 Shandong China

To better understand the nature of reactive adsorption of thiophene on Ni/ZnO adsorbent,the effect of ZnO textural structure on the desulfurization activity was *** materials were synthesized by low-temperature solid-state reaction and the corresponding Ni/ZnO adsorbents were prepared by incipient impregnation *** analysis results showed that the crystalline sizes of ZnO as-synthesized as well as the BET surface areas varied obviously with the calcination *** activity evaluations indicated that the Ni/ZnO adsorbents prepared with ZnO possessed a favorable textural structure as active component exhibited good activity of removing *** evolutions of the main crystalline phases of Ni/ZnO adsorbents before and after reaction confirmed that ZnO played a crucial role in taking up S element and converting it into ZnS in the reactive adsorption *** was concluded that ZnO with larger surface area and smaller crystal particles resulted in better desulfurization activity,which may be the main reason for the different activities of the Ni/ZnO adsorbents prepared with ZnO calcined at different temperatures.

关键词： Ni/ZnO reactive adsorption textural structure low-temperature solid-state reaction thiophene

Synergetic effect between sulfurized Mo/γ-Al_2O_3 and Ni/γ-Al_2O_3 catalysts in hydrodenitrogenation of quinoline

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Journal of Natural Gas Chemistry 2011年第2期20卷 214-217页

作者： Lihua liu Bin liu Yongming Chai Yunqi liu chenguang liu State Key Laboratory of Heavy Oil Processing Key Laboratory of Catalysis CNPC China University of Petroleum （East China） Qingdao 266555 Shandong China

An evidence for the synergetic effect between the stacked bed of Mo/γ-Al2O3 and Ni/γ-Al2O3 in the hydrodenitrogenation （HDN） reaction of quinoline has been provided in this paper. The synergism factor decreases when the reaction temperature increases （280？340 ？C）. The synergetic effect leads to improve the hydrogenation activity for the stacked bed compared with the single Mo/γ-Al2O3 bed, which may be attributed to the generation of hydrogen spillover on the Ni/γ-Al2O3 catalyst.

关键词： hydrogen spillover synergetic effect hydrodenitrogenation NiMo catalyst

Density Functional Investigation of Methanethiol and Dimethyl Sulfide Adsorption on Zeolite

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Journal of Natural Gas Chemistry 2006年第2期15卷 134-143页

作者： Renqing Lü Guangmin Qiu chenguang liu College of Chemistry and Chemical Engineering China University of Petroleum （East China） Dongying 257061 China College of Petroleum Engineering China University of Petroleum （East China） Dongying 257061 China

The density functional theory and cluster model methods have been employed to investigate the interactions between methanethiol, dimethyl sulfide and zeolites. The molecular complexes formed by adsorption of methanethiol or dimethyl sulfide on silanol H3SiOSi（OH）2OSiH3 with five coordination forms or four coordination forms, and complexes formed by interactions of BrSnsted acid sites of bridging hydroxyl H3Si（OH）AI（OH）2OSiH3 with methanethiol or dimethyl sulfide have been investigated. Full optimization and frequency analysis of all cluster models have been carried out using the B3LYP hybrid method at 6-31＋G （d,p） basis set level for hydrogen, silicon, aluminum, oxygen, carbon, and sulfur atoms. The structures and energy changes of different coordination forms between methanethiol and H3Si（OH）Al（OH）2OSiH3, dimethyl sulfide and H3Si（OH）Al（OH）2OSiH3, methanethiol and H3SiOSi（OH）2OSiH3, dimethyl sulfide and H3SiOSi（OH）2OSiH3 complexes have been comparatively studied. The calculated results showed the nature of interactions that led to the formation of all complexes was van der Waals force confirmed by an insignificant change of geometric structures and properties. The conclusions that methanethiol and dimethyl sulfide molecules were adsorbed on bridging hydroxyl group prior to silanol group were obtained on the basis of adsorption heat, the most stable adsorption models of a 6 ring structure for interaction between bridging hydroxyl and methanethiol, and a 7 ring structure for interaction between bridging hydroxyl and dimethyl sulfide.

关键词： density functional theory methanethiol dimethyl sulfide zeolite model cluster