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碳卫星超光谱探测仪地面光谱定标

光谱学与光谱分析 2023年第5期43卷 1556-1562页

作者：杜国军张玉贵崔博伦江澄欧宗耀北京空间机电研究所北京100190

碳卫星超光谱探测仪聚焦于陆地生态系统植被碳汇和森林蓄积量探测,利用670~780 nm谱段的光谱绘制植被荧光的时空分布规律,满足全球碳汇定量监测、森林植被生产力评估的需求。如何有效地标定超光谱探测仪的光谱参数,建立探测仪和被测光... 详细信息

碳卫星超光谱探测仪聚焦于陆地生态系统植被碳汇和森林蓄积量探测,利用670~780 nm谱段的光谱绘制植被荧光的时空分布规律,满足全球碳汇定量监测、森林植被生产力评估的需求。如何有效地标定超光谱探测仪的光谱参数,建立探测仪和被测光谱信息的对应关系是定量化反演的基础。通过光栅方程推导了超光谱探测仪的光谱数据误差模型,并结合光学系统的弥散斑分布函数,卷积得到了超光谱探测仪的仪器线形函数(ils)分布规律。仿真结果表明,仪器线形函数是缓慢变化的,在一个小光谱范围内ils可以近似认为是一致的;波长误差是一个系统误差,主要由光栅制造误差等引起,采用已知波长特征谱线标定的方法可以消除。通过真空罐模拟在轨环境,建立了包含可调谐激光器、波长计、旋转散射片、积分球和平行光管等装置的光谱定标系统,提供线宽小于0.001 nm均匀分布的单色标准光源,利用自动化数据处理系统测试探测仪响应曲线和单色标准光源的对应关系,标定超光谱探测仪的光谱参数。超光谱探测仪光谱采样率2.5像元左右,单波长光谱的有效数据点少,无法给出ils函数的精确数据,以0.015 nm波长间隔单波长扫描的新方法将光谱采样密度提高2个数量级,高斯拟合获取光谱分辨率,数据处理结果表明超光谱探测仪光谱分辨率为0.24~0.26 nm。通过选取特征波长和三次多项式拟合的方法得到波长定标方程,给出了全部像元的光谱定标数据,选取特征波长验证拟合波长残差,结果表明定标精度优于0.005 nm。为了进一步验证光谱定标结果,开展了超光谱探测仪的地面推扫成像实验,利用中国科学院空天院怀来试验站的测试平台,获取了松树林和石子路面的光谱数据,超光谱探测仪测量的大气吸收线和HITRAN模拟的大气吸收线比对结果表明,氧吸收线中心波长偏差小于0.003 nm,证明超光谱探测仪光谱定标精度满足指标要求。

关键词：超光谱成像定标光谱分辨率 ils 大气吸收

A comparative study of the extractive desulfurization mechanism by Cu(Ⅱ)and Zn-based imidazolium ionic liquids

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Green Energy & Environment 2019年第1期4卷 38-48页

作者： Hongping Li Beibei Zhang Wei Jiang Wenshuai Zhu Ming Zhang Chao Wang Jingyu Pang Huaming Li Institute for Energy Research Jiangsu University School of Energy and Power Engineering Jiangsu University School of Chemistry and Chemical Engineering Jiangsu University

A comparative study of the extractive desulfurization(EDS) mechanism by Cu(Ⅱ) and Zn-based ils([C_4mim]_2[MCl_4], M ? Cu(Ⅱ) or Zn)has been performed. It is found that the p–p interaction and C-H/p interaction play important roles in EDS for both Cu(Ⅱ) and Zn-based ils,which is different from Al, Fe-based ils. In the gas phase models, the interaction energy between Zn-based ils and dibenzothiophene(DBT) is stronger than the interaction energy of Cu(Ⅱ)-based ils. In order to consider the solvent effect, a generic ionic liquid of solvation model has been implemented, which is few considered in the previous calculations of EDS. It is interesting to find that the gap of interaction energies between Cu(Ⅱ), Zn-based ils and DBT are reduced when the solvent effect is considered. In addition, by combined discussion of currently theoretical and experimental evidences for metal-based ils with different compositions, we firstly propose that the EDS performance should be influenced by the balance of the contribution of cation, metal-based anion, metal chlorides and the viscosity.

关键词： Extractive desulfurization Metal-based ils Mechanism Density functional theory

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新型离子液体催化H2S制备β-巯基丙酸

精细化工 2023年第10期40卷 2249-2256页

作者：孙健王欣月金朝辉高华晶张建林易先君吉林化工学院石油化工学院吉林吉林132022 吉林化工学院研究生学院吉林吉林132022 山东益丰新材料股份有限公司山东滨州256600

以羧乙基硫代丁二酸(CETSA)为阴离子,1,5-二氮杂双环[4.3.0]-5-壬烯(DBN)、1,8-二氮杂双环[5.4.0]十一碳-7-烯(DBU)、3-二乙胺基丙胺(DEAPA)、1,1,3,3-四甲基胍(TMG)为阳离子,一步法合成4种亲水性的新型离子液体(ils)。采用^(1)HNMR、^(13)CNMR、TG、MS和FTIR对ils结构进行了表征。以丙烯酸和原位生成的H2S为原料,考察了ils对催化合成β-巯基丙酸的影响。得到的最佳工艺条件为:四氢呋喃35.00 g,丙烯酸2.16 g(0.03 mol),通过原位生成足量H2S代替传统气瓶,催化剂3.0 mmol,在水热合成反应釜中反应温度90℃,反应时间4.5 h。此时,1,5-二氮杂双环[4.3.0]-5-壬烯羧乙基硫代丁二酸盐([DBNH]CETSA)的催化效果最佳,丙烯酸转化率100%,产物选择性为90.57%。[DBNH]CETSA在反应中具有较好的稳定性,其重复使用7次仍具有较高的活性,丙烯酸的转化率仍达98.97%。

关键词： ils H2S 加成反应 β-巯基丙酸催化

Design of ionic liquids as liquid desiccant for an air conditioning system

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Green Energy & Environment 2019年第2期4卷 139-145页

作者： Haruki Watanabe Takuro Komura Ryo Matsumoto Kenta Ito Hiroshi Nakayama Toshiki Nokami Toshiyuki Itoh Department of Chemistry and Biotechnology Graduate School of Engineering Tottori University Chubu Electric Power Company Inc. Research and Development Division Energy Application Research and Development Center Center for Research on Green Sustainable Chemistry Tottori University

Suitable control of the humidity can contribute to electric energy savings. However, the present dehumidification system has many weak points. The liquid desiccant air-conditioning system has recently gained growing interest from the stand point of reducing energy consumption during dehumidification. In order to find the appropriate ionic liquids(ils) as a desiccant for the liquid desiccant air-conditioner system, we conducted a systematic evaluation of the humidification capability of 16 types of ils. Among the tested ils, tributyl(methyl)phosphonium dimethyl phosphate([P4441][DMPO_4]) exhibited the best dehumidification capacity and had a less corrosive effect on four types of metals as possible piping materials. It should be noted that this [P_(4441)][DMPO_4] has a very stable nature and produced no odor while conducting the experiment and storing for over 1 year at room temperature under ambient conditions. Furthermore, it was revealed that a 77%(w/w) aqueous solution of [P4441][DMPO_4] worked as an efficient desiccant liquid for the liquid desiccant air-conditioner system.

关键词： Dehumidification Liquid desiccant Ionic liquids Air-conditioner system Phosphonium ils

COSMO-RS: An ionic liquid prescreening tool for gas hydrate mitigation

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Chinese Journal of Chemical Engineering 2016年第11期24卷 1619-1624页

作者： Cornelius B.Bavoh Bhajan Lal Omar Nashed Muhammad S.Khan Lau K.Keong Mohd.Azmi Bustam Chemical Engineering Department Universiti Teknologi PETRONAS

Recently ionic liquids(ils) are introduced as novel dual function gas hydrate inhibitors. However, no desired gas hydrate inhibition has been reported due to poor IL selection and/or tuning method. Trial & error as well as selection based on existing literature are the methods currently employed for selecting and/or tuning ils. These methods are probabilistic, time consuming, expensive and may not result in selecting high performance ils for gas hydrate mitigation. In this work, COSMO-RS is considered as a prescreening tool of ils for gas hydrate mitigation by predicting the hydrogen bonding energies(E_(HB)) of studied IL inhibitors and comparing the predicted E_(HB) to the depression temperature(?) and induction time. Results show that, predicted EHBand chain length of ils strongly relate and significantly affect the gas hydrate inhibition depression temperature but correlate moderately(R = 0.70) with average induction time in literature. It is deduced from the results that, ? increases with increasing IL EHBand/or decreases with increasing chain length. However, the cation–anion pairing of ils also affects IL gas hydrate inhibition performance. Furthermore, a visual and better understanding of IL/water behavior for gas hydrate inhibition in terms of hydrogen bond donor and acceptor interaction analysis is also presented by determining the sigma profile and sigma potential of studied IL cations and anions used for gas hydrate mitigation for easy IL selection.

关键词：天然气水合物离子液体工具水合物抑制剂初筛调谐方法抑制性能 ils

Electrochemical oxidation behavior of hydroxypivalaldehyde in the ionic liquids

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Chinese Chemical Letters 2008年第3期19卷 319-323页

作者： Jian Fang Zhong De Liang He Zhou Zhou Yi Bin Xu State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering Hunan University Changsha 410082 China

The similar electrochemical oxidation behaviors of hydroxypivalaldehyde in ionic liquids （ils） medium, C4MIMPF6, C4MIMBF4 and CsMIMPF6, are investigated using classic electrochemical methods, respectively. Only the product, hydroxypivalic acid is detected by high performance liquid chromatography （HPLC）. It can be conferred that the electrochemical oxidation of hydroxypivalaldehyde consists of two successive one-electron irreversible reactions at glass carbon （GC） electrode and the possible reaction mechanism in the ils is proposed firstly. The diffusion coefficients of hydroxypivalaldehyde are obtained according to the electrochemical characteristics of hydroxypivalaldehyde in C4MIMPF6, C4MIMBF4 and CsMIMPF6.

关键词： Hydroxypivalaldehyde ils Cyclic voltammetry Chronocoulometry

Ionic Liquids in Energy and Environment

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Green Energy & Environment 2019年第2期4卷 93-94页

作者： Toshiyuki Itoh Masayoshi Watanabe Liangnian He Tottori University Yokohama National University Nankai University

Ionic liquids (ils) have received a great deal of attention because they are less-volatile, less-flammable, have low toxicity and unique solubility for many organic and inorganic materials, and these properties allow them to be used in various fields of sustainable sciences. Remarkable progress in the science of ils has been accomplished during the past two decades;the number of publications of ils reached more than 90,000 since 1999 to be present [1]. ils are nowwell recognized as essential players in the fields of environmental benign synthesis, catalysts, extraction, electrochemistry, and biotechnology, and they also attract much attention as a key technology to promote the spread of renewable energy.

关键词： ils energy number

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新型离子液体催化HS制备β-巯基丙酸

精细化工 2023年

作者：孙健王欣月金朝辉高华晶张建林易先君吉林化工学院研究生学院山东益丰新材料股份有限公司吉林化工学院石油化工学院

以羧乙基硫代丁二酸(CETSA)为阴离子，1，5-二氮杂双环[4.3.0]-5-壬烯(DBN)、1，8-二氮杂双环[5.4.0]十一碳-7-烯(DBU)、3-二乙胺基丙胺(DEAPA)、1，1，3，3-四甲基胍(TMG)为阳离子，一步法合成4种亲水性的新型离子液体(ils)。采用1HNMR... 详细信息

以羧乙基硫代丁二酸(CETSA)为阴离子，1，5-二氮杂双环[4.3.0]-5-壬烯(DBN)、1，8-二氮杂双环[5.4.0]十一碳-7-烯(DBU)、3-二乙胺基丙胺(DEAPA)、1，1，3，3-四甲基胍(TMG)为阳离子，一步法合成4种亲水性的新型离子液体(ils)。采用1HNMR、13CNMR、TG、MS和FTIR对ils结构进行了表征。以丙烯酸和原位生成的H2S为原料，考察了ils对催化合成β-巯基丙酸的影响。得到的最佳工艺条件为：四氢呋喃35 g，丙烯酸2.16 g(0.03mol)，通过原位生成足量H2S代替传统气瓶，催化剂3 mmol，在水热合成反应釜中反应温度90 ℃，反应时间4.5 h。此时，1，5-二氮杂双环[4.3.0]-5-壬烯羧乙基硫代丁二酸盐([DBNH]CETSA)的催化效果最佳，丙烯酸转化率100%，产物选择性为90.57%。[DBNH]CETSA在反应中具有较好的稳定性，其重复使用7次仍具有较高的活性，丙烯酸的转化率仍达98.97%。

关键词： ils H S 加成反应 β-巯基丙酸催化

基于无人机的VOR/ils实时检测分析系统设计与实现

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基于无人机的VOR/ILS实时检测分析系统设计与实现

作者：刘芳弟中国民航大学

学位级别：硕士

中国民航业发展迅猛,机场总量也在持续地增加,同时其航空业务量也在高速地上升,给机场安全运行带来了巨大压力。民航VOR、ils等导航设备的正常运行,对机场安全运行提供了至关重要的保障。这些设备在投产和使用时,都需要进行全面的测试... 详细信息

中国民航业发展迅猛,机场总量也在持续地增加,同时其航空业务量也在高速地上升,给机场安全运行带来了巨大压力。民航VOR、ils等导航设备的正常运行,对机场安全运行提供了至关重要的保障。这些设备在投产和使用时,都需要进行全面的测试。国内外所采用的测试方式主要有两种,一种是地面人工测试,这种方式简便且费用低,但是难以保证信号测试的全面性;另一种是采用校飞飞机进行测试,这种方式虽然可以保证测试的全面性,但是费用高且灵活性低,无法做到信号的实时测量。针对以上情况,一种新的VOR/ils导航信号检测分析系统的研究迫在眉睫。本课题利用无人机高效灵活、成本低的特点,而且可以对VOR/ils导航信号进行实时、高效和全面地检测,同时系统还可以采集VOR/ils信号进行脱机处理。因此,设计基于无人机的VOR/LIS实时检测分析系统,具有重要的现实意义。首先,阐述VOR和ils的原理及信号特点,对基于无人机的VOR/ils实时检测分析系统的整体需求进行分析,以此设计了系统总体实现方案,并对信号实时处理部分和地面端监控部分进行了功能模块划分。其次,设计基于ZYNQ的VOR/ils实时检测系统,主要包括射频前端单元、预处理单元、VOR信号、ils信号和GPS信息处理单元、获取台站识别码单元,同时还设计了基带信号存储模块与PS处理器系统部分主程序运行。然后,设计完成了地面端监控系统部分,包括数据传输过程中的帧格式,从而实现数据接收、解析、控制命令生成与发送过程。按照对软件功能的总体设计要求,完成了上位机软件界面设计,从而给出其设计过程,并对其功能进行了详细说明。最后,对基于无人机的VOR/ils实时检测分析系统的性能进行测试验证。根据所设计系统,构建测试环境,然后根据功能一一进行测试与分析,以验证系统功能的稳定性和准确性。结果表明,本系统可以对VOR/ils信号进行实时测量,并对机载工作状态进行控制,具有重要的实际应用价值。

关键词：无人机 ZYNQ VOR ils 实时检测