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富油煤原位热解技术研究现状及进展

煤炭学报 2024年第9期49卷 3969-3984页

作者：王苗王长安宁星陈美静黄笑乐薛香玉毛崎森邓磊车得福西安交通大学能源与动力工程学院陕西西安710049

我国富油煤资源量丰富,原位热解提取油气不仅可以实现富油煤的高效清洁低碳利用,还可以缓解油气对外依存度,是未来富油煤开采利用的重要发展方向之一。简述了富油煤的热物理性质及分布特性,地面热解和原位热解的工艺特点,重点阐述了富... 详细信息

我国富油煤资源量丰富,原位热解提取油气不仅可以实现富油煤的高效清洁低碳利用,还可以缓解油气对外依存度,是未来富油煤开采利用的重要发展方向之一。简述了富油煤的热物理性质及分布特性,地面热解和原位热解的工艺特点,重点阐述了富油煤原位热解(布井方式、加热方式、原位气化热解一体化、余热利用、储层压裂、地下封闭技术)的研究现状及进展,最后对富油煤原位热解技术的发展方向进行了展望。①梯级利用是富油煤地面热解的重要途径,井工式原位热解可实现井下收油,但需解决长距离输运管道保温问题,钻孔式原位热解是通过高温介质或电加热进行热解,可采用矿区的分布式能源加热载热流体。②推荐采用对流加热为主,其他加热方式为辅的复合加热技术,可利用原位热解后的余热预热载热流体,也可将煤层局部氧化反应的热量用于富油煤原位热解过程,降低载热流体的注热能耗。③原位气化热解一体化技术可有效提高热能利用率,但气化空腔需进行填充。④综合考虑储层压裂和富油煤原位热解孔隙变化规律,控制煤层裂缝生成路径,形成裂缝网络,以增强煤层热传导效率,降低油气产物在煤层中的运移难度。⑤根据富油煤热解工艺特点,选择适宜的地下体系封闭技术,可促进富油煤原位热解过程中能量的高效利用及生态环境保护,其中CO_(2)气驱止水技术在实现地下体系封闭的同时,还可以进行油气驱替并实现CO_(2)的地质封存。

关键词：富油煤原位热解加热技术储层压裂体系封闭

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Comparative analysis on gas–solid drag models in MFIX-DEM simulations of bubbling fluidized bed

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Chinese Journal of Chemical Engineering 2023年第12期64卷 64-75页

作者： Ruiyu Li xiaole huang Yuhao Wu Lingxiao Dong Srdjan Beloševic Aleksandar Milicevic Ivan Tomanovic Lei Deng Defu Che State Key Laboratory of Multiphase Flow in Power Engineering School of Energy and Power EngineeringXi’an Jiaotong UniversityXi’an 710049China Shunde Institute of Inspection Guangdong Institute of Special Equipment Inspection and ResearchFoshan 528300China Department of Thermal Engineering and Energy "VINCA" Institute of Nuclear Sciences–National Institute of the Republic of SerbiaUniversity of BelgradeMike Petrovica Alasa 12-1411351 VincaPO Box 52211001 BelgradeSerbia

In this study,the open-source software MFIX-DEM simulations of a bubbling fluidized bed(BFB)are applied to assess nine drag models according to experimental and direct numerical simulation(DNS)*** influence of superficial gas velocity on gas–solid flow is also *** results show that according to the distribution of time-averaged particle axial velocity in y direction,except for Wen–Yu and Tenneti–Garg–Subramaniam(TGS),other drag models are consistent with the experimental and DNS *** the TGS drag model,the layer-by-layer movement of particles is observed,which indicates the particle velocity is not correctly *** time domain and frequency domain analysis results of pressure drop of each drag model are *** is recommended to use the drag model derived from DNS or fine grid computational fluid dynamics–discrete element method(CFD-DEM)data first for CFD-DEM *** the investigated BFB,the superficial gas velocity less than 0.9 m·s^(-1) should be adopted to obtain normal hydrodynamics.

关键词： MFIX-DEM Simulation Dense flow Gas-solid Bubbling fluidized bed Drag model

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生物质炉排炉超低排放技术研究

能源与环保 2024年第1期46卷 173-182页

作者：张世鑫许燕飞郭涛江建忠黄笑乐邓磊西安华电清洁能源技术有限公司陕西西安710061 福建华电丰海发电有限公司福建永安366000 西安交通大学动力工程多相流国家重点实验室陕西西安710049

总结了生物质炉排炉目前污染物排放控制措施,分析了各项措施的优缺点,提出“达标第一、综合治理”的控制理念,以反应机理为基础,从燃烧调整角度控制原始排放,优化改造实现脱除能力,动态控制实现最终目标,在实现脱硫、脱硝达标基础上,尽... 详细信息

总结了生物质炉排炉目前污染物排放控制措施,分析了各项措施的优缺点,提出“达标第一、综合治理”的控制理念,以反应机理为基础,从燃烧调整角度控制原始排放,优化改造实现脱除能力,动态控制实现最终目标,在实现脱硫、脱硝达标基础上,尽量降低改造及运行成本。通过实际项目应用结果表明:生物质炉排炉通过燃烧优化、逻辑优化、脱硝系统改造、脱硫系统改造,最终可以实现脱硫、脱硝超低排放运行,即SO_(2)≤35 mg/m^(3),NOx≤50 mg/m^(3)。同时此方法可有效降低原始排放,并提升锅炉效率,经燃烧控制逻辑优化后,NO_(x)原始生成量降低50~70 mg/m^(3),SO_(2)原始生成量降低5~10 mg/m^(3),炉内CO含量由之前的8 000~11 000 mg/m^(3)降至1 000~4 000 mg/m^(3)。

关键词：生物质炉排炉超低排放脱硫脱硝

Crosstalk between glioblastoma and tumor microenvironment drives proneural–mesenchymal transition through ligand-receptor interactions

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Genes & Diseases 2024年第2期11卷 874-889页

作者： Yancheng Lai xiaole Lu Yankai Liao Pei Ouyang Hai Wang Xian Zhang Guanglong huang Songtao Qi Yaomin Li Department of Neurosurgery Institute of Brain DiseaseNanfang HospitalSouthern Medical UniversityGuangzhouGuangdong 510515China Laboratory for Precision Neurosurgery Nanfang HospitalSouthern Medical UniversityGuangzhouGuangdong 510515China

Glioblastoma(GBM)is the most common intrinsic and aggressive primary brain tumor in adults,with a median survival of approximately 15 *** heterogeneity is considered responsible for the treatment resistance and unfavorable ***-mesenchymal transition(PMT)represents GBM malignant progression and recurrence,which might be a breakthrough to understand GBM heterogeneity and overcome treatment *** is a complicated process influenced by crosstalk between GBM and tumor microenvironment,depending on intricate ligand-receptor *** this review,we summarize the autocrine and paracrine pathways in the GBM microenvironment and related ligand-receptor interactions inducing *** also discuss the current therapies targeting the PMT-related autocrine and paracrine ***,this review offers a comprehensive understanding of the failure of GBM-targeted therapy and ideas for future tendencies of GBM treatment.

关键词： Autocrine Glioblastoma Ligand-receptor interaction Microenvironment Paracrine Proneural-mesenchymal transition

Silurian integrative stratigraphy,biotas,and paleogeographical evolution of the Qinghai-Tibetan Plateau and its surrounding areas

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Science China Earth Sciences 2024年第4期67卷 1005-1035页

作者： Zhongyang CHEN Qing CHEN Guangxu WANG Xiang FANG Peng TANG Guanzhou YAN Wenwei YUAN Bing huang xiaole ZHANG Kui YAN Yuandong ZHANG Yi WANG State Key Laboratory of Palaeobiology and Stratigraphy Nanjing Institute of Geology and PalaeontologyChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China

The Silurian palaeontology and stratigraphy of the Qinghai-Tibetan Plateau have been studied for more than100 *** the launch of the Second Tibetan Plateau Scientific Expedition and Research,it is necessary to update the summaries of the Silurian stratigraphy and fossil assemblages of the Qinghai-Tibetan Plateau and their correlation with its surrounding *** this study,we have selected 33 sections from the Qinghai-Tibetan Plateau and its surroundings areas,summarised the available data in terms of stratigraphic regionalisation,lithostratigraphy,chronostratigraphy,and biostratigraphy,and divided the study area into four stratigraphic provinces:the Xizang-Western Yunnan-Western Sichuan Province,the KunlunQilian Province,the South China Province,and the Tarim *** general,the Silurian strata in the Qinghai-Tibetan Plateau is more complete than those in other areas of *** studies of the vertebrate faunas,sporomorph assemblages,and brachiopod faunas of the study area indicate a closer geographical relationship between the South China,Tarim,and Indochina palaeoplates,than previously *** with the surrounding areas where Silurian strata have been extensively studied,the study of Silurian strata in the main part of the Qinghai-Tibetan Plateau is still in the preliminary *** the future,it is necessary to conduct research on the age,distribution,and resource potential of basal Silurian black shales to provide new directions for shale gas exploration and development in *** shallow marine strata of the middle to upper Silurian require further *** that the Silurian System in the Qinghai-Tibetan Plateau is more complete,it has the potential to supplement and improve the study of the carbon isotope stratigraphy of the Silurian in China.

关键词： Qinghai-Tibetan Plateau Silurian Stratigraphic regionalisation Lithostratigraphy Biostratigraphy Palaeogeographical evolution

Microbial community dynamics and flavor formation mechanisms during fermentation of fermented chilies from different regions based on macro-genome sequencing， SPME-GC-MS， electronic nose， and electronic tongue

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Food Science and Human Wellness 2024年

作者： Hui Liao Yi Luo Xiang Lian Hussain Asif Xinlei huang xiaole Xia The Key Laboratory of Industrial Biotechnology， Ministry of Education， School of Biotechnology， Jiangnan University College of Food Science and Engineering， Tianjin University of Science & Technology

Fermented chili products are popular traditional fermented foods around the world. However， differences in microbial communities in fermented chilies from different regions and how they affect the flavor compounds in chili fermentation have not been reported. In this study， the dynamics of flavor compounds and microbial communities in fermented chilies from Sichuan， Guizhou， and Hunan were systematically investigated by macro-genome sequencing， solid phase microextraction-gas chromatograph-mass spectrometry (SPME-GC-MS)， electronic nose， and electronic tongue techniques. Simultaneously， the microbial metabolic mechanisms and the relationship between flavor compounds and microbiome were unraveled through staged and simulated fermentation analysis. The results showed that 53 chemical odorants， including alcohols， esters， aldehydes， and acids， were identified as chemical markers to differentiate the regional samples. Twelve microbial species， including Staphylococcus xylosus， Unclassified staphylococcus species， Weissella confusus， Lactococcus cremoris， Lactococcus garvieae， Lactiplantibacillus sakei， Pediciococcus propionicigenes， Pediciococcus idahonensis， Pediciococcus aciditolerans， Nocardioides antri， Debaryomyces hansenii， and Colletotrichum scovillei， were identified as microbial markers to differentiate the regional samples. Correlation analysis showed that Lactobacillaceae was associated with fruity， floral， spicy， and fatty aromas. The electronic nose and tongue analysis results showed that 9 flavor and 8 taste indicators significantly differed between regional samples (P < 0.05). Additionally， flavor compounds and microbial diversity were robust under initial selection stress and showed higher diversity under metabolome-microbiome interactions. Importantly， simulated fermentation confirmed that metabolome-microbiome interactions drove the shift in microbial structure， metabolism， and flavor in regionally fermented chilies. These results provide insights into

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Energy-efficient intermittent liquid heating of lithium-ion batteries in extreme cold using phase change materials

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Science China Technological Sciences 2024年

作者： LI KaiXuan ZHANG JingShu YAO xiaole huang ZiZe LI WenLong JU Xing XU Chao Key Laboratory of Power Station Energy Transfer Conversion and System of MOE North China Electric Power University

The electrochemical performance of lithium-ion batteries significantly deteriorates in extreme cold. Thus, to ensure battery safety under various conditions, various heating and insulation strategies are implemented. The present study proposes a hybrid heating approach combining active heating with passive insulation. Conceptual experiments were conducted to investigate the effects of phase change materials(PCMs), inlet water temperature, and intermittent pump startup strategies on battery performance. The obtained experimental results demonstrate that low temperatures lead to increased electrochemical impedance and reduced charge–discharge capacity in batteries. Notably, charge transfer resistance of 162 mΩ was observed at-30°C. Herein,the developed PCM-based battery heating system effectively extended the operational capacity of batteries in cold driving conditions and maintained battery warmth by leveraging the superior heat storage capability of the PCM. Additionally, after the switch off of the heating system, the charge capacity of the battery exceeded 80% owing to latent heat. The use of an intermittent heating strategy not only allowed to conserve energy but also maintained adequate heat storage within the battery module. At-30°C, this strategy enhanced the power efficiency of the cooling system by 35.94% with a reduction in capacity of only 0.8%compared to the continuous strategy.

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生物质水洗时有机物释放的实验研究

华中科技大学学报:自然科学版 2023年第8期51卷 88-92页

作者：邓磊黄笑乐吴宇浩车得福西安交通大学动力工程多相流国家重点实验室陕西西安710049

为研究生物质水洗滤液的有机成分,提取小麦秸秆、稻壳、玉米秸秆水洗滤液中的有机物,借助气相色谱质谱联用仪(GC-MS)分析滤液成分,考察了30,60,90℃三个水洗温度下滤液有机物种类与质量分数变化.结果表明:生物质水洗滤液中有机物种类随... 详细信息

为研究生物质水洗滤液的有机成分,提取小麦秸秆、稻壳、玉米秸秆水洗滤液中的有机物,借助气相色谱质谱联用仪(GC-MS)分析滤液成分,考察了30,60,90℃三个水洗温度下滤液有机物种类与质量分数变化.结果表明:生物质水洗滤液中有机物种类随水洗温度的升高而增加;30℃下滤液中的有机物以酯类为主,90℃则以烃类和芳香族类为主;三种生物质30℃下水洗滤液中苯乙烯质量浓度较高,60℃下苯乙烯质量浓度大幅降低,90℃时观察到二次释放苯乙烯;对于稻壳和玉米秸秆,60℃下滤液中邻苯二甲酸二丁酯(DBP)质量浓度分别为1.13×10^(-4)和2.72×10^(-4)mg·L^(-1),而此时小麦秸秆滤液中DBP质量浓度为0.02 mg·L^(-1).所有实验中DBP质量浓度均满足我国相关污水排放标准,但苯乙烯质量浓度高于部分地方标准,水洗滤液还田仍须审慎考虑.

关键词：生物质水洗有机化合物邻苯二甲酸二丁酯苯乙烯化学分析

大学生赴基层就业的影响因素分析及指导策略——基于社会认知职业理论

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河南科技学院学报（社会科学版） 2014年第10期34卷 51-54页

作者：黄小乐漳州闽南师范大学文学院福建漳州363000

以社会认知职业理论为依据,对大学毕业生选择基层就业的影响因素进行考察。结果发现:社会经济地位对结果期待和职业兴趣有显著的负向影响;学习经验直接影响结果期待,通过知觉支持间接、正向地影响自我效能感;知觉支持可以直接、正向地... 详细信息

以社会认知职业理论为依据,对大学毕业生选择基层就业的影响因素进行考察。结果发现:社会经济地位对结果期待和职业兴趣有显著的负向影响;学习经验直接影响结果期待,通过知觉支持间接、正向地影响自我效能感;知觉支持可以直接、正向地影响职业兴趣和职业意向,也可以通过自我效能感间接、正向地影响职业兴趣和职业意向;自我效能感直接、正向地影响结果期待,并且两者共同影响职业兴趣和职业意向。据此提出引导大学生赴基层就业的指导策略:开展毕业生基层实践活动、提升毕业生自我效能感、展示翔实的结果预期信息、建立社会支持系统。

关键词：大学生基层就业社会认知职业理论