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Cultivars and oil extraction techniques affect Cd/Pb contents and health risks in oil of rapeseed grown

《环境科学与工程前沿（英文）》 2023年第17卷第7期 doi: 10.1007/s11783-023-1687-z

摘要：

● Organic solvent extracted fewer Cd/Pb in rapeseed oil than physical pressing.

关键词： Rapeseed oil Oil extraction technologies Human health risk assessment Cd/Pb-contaminated farmland Substitute planting

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EXTRACTION AND EVALUATION OF EDIBLE OIL FROM SCHIZOCHYTRIUM SP. USING AN AQUEOUS ENZYMATIC METHOD

《农业科学与工程前沿（英文）》 2021年第8卷第4期页码 623-634 doi: 10.15302/J-FASE -2021400

摘要：

Schizochytrium sp., a marine microalga, is a potential source of edible oil due to its short growth cycle and rapid lipid accumulation, especially of docosahexaenoic acid. An approach to isolate edible microalgal oil from Schizochytrium sp. using aqueous enzymatic extraction (AEE) was developed. Parameters were optimized by single-factor experiments followed by Box-Behnken design. Proteases were effective in extracting oil. The maximum free oil recovery (49.7%±0.58%) and total oil recovery (68.1%±0.94%) were obtained under optimum conditions of liquid-to-solid ratio of 4.8:1, a 2.5% enzyme concentration of papain and an extraction time of 2.2 h. There was a significant difference (P<0.05) in polyunsaturated fatty acid composition between microalgal oil obtained by AEE and by Soxhlet extraction, with the former having superior physiochemical properties and higher concentrations of bioactive components including total phenolic compounds and total tocopherols. These findings indicate a potential application of AEE for extraction of oil from Schizochytrium sp.

关键词： antioxidant activity / aqueous enzymatic extraction / edible microalgal oil / fatty acid composition / physicochemical properties

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Predicting the yield of pomegranate oil from supercritical extraction using artificial neural networks

J. Sargolzaei, A. Hedayati Moghaddam

《化学科学与工程前沿（英文）》 2013年第7卷第3期页码 357-365 doi: 10.1007/s11705-013-1336-3

摘要： Various simulation tools were used to develop an effective intelligent system to predict the effects of temperature and pressure on an oil extraction yield. Pomegranate oil was extracted using a supercritical CO (SC-CO ) process. Several simulation systems including a back-propagation neural network (BPNN), a radial basis function neural network (RBFNN) and an adaptive-network-based fuzzy inference system (ANFIS) were tested and their results were compared to determine the best predictive model. The performance of these networks was evaluated using the coefficient of determination ( ) and the mean square error (MSE). The best correlation between the predicted and the experimental data was achieved using the BPNN method with an of 0.9948.

关键词： oil recovery artificial intelligence extraction neural networks supercritical extraction

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Oxidation-extraction desulfurization of model oil over Zr-ZSM-5/SBA-15 and kinetic study

Chuanzhu LU,Hui FU,Huipeng LI,Hua ZHAO,Tianfeng CAI

《化学科学与工程前沿（英文）》 2014年第8卷第2期页码 203-211 doi: 10.1007/s11705-014-1420-3

摘要： ZSM-5/SBA-15 composite molecular sieves were synthesized using post-synthesis method and characterized by X-ray diffraction and N adsorption-desorption. The oxidative-extration desulfurization of model oil was investigated by using hydrogen peroxide as the oxidant, tetrabutyl ammonium bromide as phase transfer catalyst, dimethyl sulfoxide as extractant, and Zr-ZSM-5/SBA-15, Ag-ZSM-5/SBA-15, Ce-ZSM-5/SBA-15 as catalyst. Under the optimal conditions, the desulfurization rate decreases in the order: Zr-ZSM-5/SBA-15>Ce-ZSM-5/SBA-15>Ag-ZSM-5/SBA-15. The highest desulfurization rate is 84.53% under the catalysis of Zr-ZSM-5/SBA-15. Kinetics analysis shows that the reaction is pseudo-first-order with the activation energy of 44.23 kJ/mol.

关键词： composite molecular sieve oxidation desulfuration extraction kinetic

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Highly effective extraction of oil from soybean by pretreatment of solid-state fermentation with fungi

Xiaojuan NIU, Shuyi QIU, Yuangen WU, Jie YUAN, Yingying XU

《化学科学与工程前沿（英文）》 2011年第5卷第1期页码 122-125 doi: 10.1007/s11705-010-0533-6

摘要： The solid-state prefermentation by (CICC 2377) and (CICC 40536) was employed to increase the oil extraction yield from soybean. The influence of incubation time on oil yield was investigated. The maximum oil yield extracted from the substrate prefermented by for 96 h was 23%, which increased by 47.4% compared with control (15.6%). In the same fermentation conditions, the maximum oil yield extracted from substrate prefermented by was 21.6%, which increased by 38.5% compared with control (15.6%). The quality of soybean oil was not changed obviously by the pretreatment of fermentation with fungi.

关键词： soybean Aspergillus niger Aspergillus flavus solid-state fermentation extraction of oil

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Technologies for extracting lipids from oleaginous microorganisms for biodiesel production

Cunwen WANG, Lu CHEN, Bajpai RAKESH, Yuanhang QIN, Renliang LV

《能源前沿（英文）》 2012年第6卷第3期页码 266-274 doi: 10.1007/s11708-012-0193-y

摘要： Recently, biodiesel has received much more attention. Soybean oil, rapeseed oil, palm oil and corn oil are primary feedstock for biodiesel production. However, biodiesel production from these traditional oil-rich crops is limited by land availability, climate, and environmental and social issues regarding the use of feed and food crops for fuel. Oleaginous microorganisms, including microalgae, bacteria, yeast and fungi can be cultivated with high lipid contents and used as promising feedstock for biodiesel production. However, the high cost of biodiesel production using oil microorganisms has been the biggest obstacle for its industrialization. The process of biodiesel production from microorganisms involves many steps, of which the lipids extraction is the most important and costly. Therefore, searching for an effective and economical extraction system is critical. Various approaches of lipids extraction are discussed in this review, including traditional extraction procedures such as solvent extraction, pressing and solvent integrated extraction, as well as some new procedures.

关键词： oleaginous microorganisms biodiesel solvent extraction ultrasound-assisted extraction microwave-assisted extraction supercritical fluid extraction (SFE)

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Environmental and economic assessment of vegetable oil production using membrane separation and vapor

Weibin Kong, Qi Miao, Peiyong Qin, Jan Baeyens, Tianwei Tan

《化学科学与工程前沿（英文）》 2017年第11卷第2期页码 166-176 doi: 10.1007/s11705-017-1616-4

摘要： Solvent extraction of crude oil from oilseeds is widely applied for its high production capacity and low cost. In this process, solvent recovery and tail gas treatment are usually performed by adsorption, paraffin scrubbing, or even cryogenics (at low tail gas flow rates). Membrane separation, which has a lower energy consumption than these techniques, spans a broad range of admissible concentrations and flow rates, and is moreover easily combined with other techniques. Vapor recompression has potentials to reduce the heat loss in association with distillation and evaporation. In this study, we proved the possibility of combining membrane separation and vapor recompression to improve the conventional vegetable oil production, by both experiments and process simulation. Nearly 73% of energy can be saved in the process of vegetable oil extraction by the novel processing approach. By further environmental assessment, several impact categories show that the optimized process is environmentally sustainable.

关键词： vegetable oil solvent-extraction membrane separation vapor recompression environmental and economic assessment

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中国油气田开发现状、面临的挑战和技术发展方向

韩大匡

《中国工程科学》 2010年第12卷第5期页码 51-57

摘要：

回顾了我国油气田开发所走过的不平凡光辉历程，简要叙述了我国油气田的储层地质特点、主要类型和已形成的技术系列，揭示了近年来所面临的严峻挑战，比较详细地阐述了应对这些挑战的技术对策和开发好高含水、低渗透、稠油、海洋等主要类型油田和各种复杂气田的技术发展方向。

关键词：中国油气田开发技术系列高含水油田低渗透油田稠油油田海洋油田复杂气田技术发展方向

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陆上超深层油气勘探理论进展与关键技术 Review

郭旭升, 胡东风, 李宇平, 段金宝, 张学丰, 范小军, 段华, 李文成

《工程（英文）》 2019年第5卷第3期页码 458-470 doi: 10.1016/j.eng.2019.01.012

摘要：

中浅层越来越难以发现新的大型油气藏，世界油气勘探有向深层-超深层进军的趋势。近些年来，中国在超深层领域，包括在碳酸盐岩和碎屑岩储层中，取得了令人瞩目的油气勘探成果，发现了（超）大型油（气）田。为了分享这些油气藏的勘探开发经验，本文从油气成藏机理和关键技术两方面进行了总结。超深层油气来源于多元供烃和多期充注。由于低地温梯度或超压作用，在超深层仍然可发育液态烃；且由于深部烃-水-岩反应或深源气体的加入而使超深层天然气组分复杂化。这些油气主要储存于原始高能礁滩或砂体沉积体中，它们具有较高的原始孔隙度。后期溶蚀、白云岩化、破裂作用常使得储层次生孔隙发育。而烃类较早充注等保持性成岩作用，则使得早期孔隙得以保存至今。超深层油气成藏一般呈现近源富集和持续保存的规律。超深层油气藏的有效勘探开发，离不开关键技术的支撑。采用最新的地震信号采集及处理、低孔渗带预测和气水识别等技术，使得超深层油气得以被发现；而先进的钻完井和油气测试技术，则保证了这些油气田的有效开发。

关键词：油气勘探超深层油气来源储层油气富集勘探开发技术

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低渗高粘稀油油藏蒸汽采油技术研究

王立智,王云龙

《中国工程科学》 2012年第14卷第4期页码 88-94

摘要：

为了探索高粘稀油油藏降低储层原油粘度、提高渗流能力、增加流度，进一步研究区块加密后提高采收率的新技术、新方法，2006—2008年开展了“蒸汽驱油现场先导试验”。针对油藏原油粘度高、渗透率低、粘土含量高、有效厚度小等特点，开展了室内物模实验，进行了蒸汽驱油可行性研究；应用数值模拟技术优选了注汽参数和驱替方式；开展了地层防膨预处理和井筒隔热技术研究。现场试验3个井组，累积增油1.81×104 t。通过试验研究，给出了低渗高粘稀油油藏适合蒸汽驱油技术的地质条件。

关键词：低渗高粘稀油蒸汽采油

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Entity and relation extraction with rule-guided dictionary as domain knowledge

《工程管理前沿（英文）》 2022年第9卷第4期页码 610-622 doi: 10.1007/s42524-022-0226-0

摘要： Entity and relation extraction is an indispensable part of domain knowledge graph construction, which can serve relevant knowledge needs in a specific domain, such as providing support for product research, sales, risk control, and domain hotspot analysis. The existing entity and relation extraction methods that depend on pretrained models have shown promising performance on open datasets. However, the performance of these methods degrades when they face domain-specific datasets. Entity extraction models treat characters as basic semantic units while ignoring known character dependency in specific domains. Relation extraction is based on the hypothesis that the relations hidden in sentences are unified, thereby neglecting that relations may be diverse in different entity tuples. To address the problems above, this paper first introduced prior knowledge composed of domain dictionaries to enhance characters’ dependence. Second, domain rules were built to eliminate noise in entity relations and promote potential entity relation extraction. Finally, experiments were designed to verify the effectiveness of our proposed methods. Experimental results on two domains, including laser industry and unmanned ship, showed the superiority of our methods. The F1 value on laser industry entity, unmanned ship entity, laser industry relation, and unmanned ship relation datasets is improved by +1%, +6%, +2%, and +1%, respectively. In addition, the extraction accuracy of entity relation triplet reaches 83% and 76% on laser industry entity pair and unmanned ship entity pair datasets, respectively.

关键词： entity extraction relation extraction prior knowledge domain rule

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迈向21世纪的炼油技术

侯芙生

《中国工程科学》 1999年第1卷第3期页码 22-30

摘要：

21世纪石油仍将是主要能源，炼油技术将进一步发展。降低汽车排放污染的清洁汽油生产技术，低硫低芳清洁柴油生产技术，加氢法润滑油基础油生产技术，加氢裂化和催化裂化重质油转化技术，渣油加工和能量综合利用技术，炼油厂现代化信息技术和过程控制技术等，将成为迈向21世纪有发展前途的炼油技术。

关键词：炼油技术清洁燃料重油转化渣油加工过程控制

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延长油田长6油藏注水开发及水驱前缘微地震监测应用

郝世彦,王永东

《中国工程科学》 2012年第14卷第4期页码 8-11

摘要：

论述了延长油田长6井组的转注原因及注水前缘微地震监测。延长油田子长采油厂4237井组的注水前缘优势方向为北东东向，受到原地应力场方向影响强烈。研究表明，注采井网的布局应该同时参考原地应力场方向及原有裂缝方向。依据监测结果，油水井布置方向是正确的，应该缩短沿北北西方向的油、水井距，以提高注水见效程度。

关键词：延长油田注水开发微地震监测水驱前缘

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An extraction- assay system: Evaluation on flavonols in plant resistance to Pb and Cd by supercriticalextraction- gas chromatography

Xu Zhang, Huanhuan Yang, Xinlei Wang, Wen Song, Zhaojie Cui

《环境科学与工程前沿（英文）》 2018年第12卷第4期 doi: 10.1007/s11783-018-1059-2

摘要：

SFE-GC system is established for flavonols assessment.

Optimal parameters of SFE-GC are evaluated and determined.

Quercetin and kaempferol are detected in plant under heavy metal stress.

Gene expression analysis shows consistent regularity with content of flavonols.

ROS level is applied for elaborating the plant resistance status.

关键词： Flavonols Heavy metal Supercritical carbon dioxide extraction (SFE) GC Plant resistance

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Feature extraction from slice data for reverse engineering

ZHANG Yingjie, LU Shangning

《机械工程前沿（英文）》 2007年第2卷第1期页码 25-31 doi: 10.1007/s11465-007-0004-z

摘要： A new approach to feature extraction for slice data points is presented. The reconstruction of objects is performed as follows. First, all contours in each slice are extracted by contour tracing algorithms. Then the data points on the contours are analyzed, and the curve segments of the contours are divided into three categories: straight lines, conic curves and B-spline curves. The curve fitting methods are applied for each curve segment to remove the unwanted points with pre-determined tolerance. Finally, the features, which consist of the object and connection relations among them, are founded by matching the corresponding contours in adjacent slices, and 3D models are reconstructed based on the features. The proposed approach has been implemented in OpenGL, and the feasibility of the proposed method has been verified by several cases.

关键词： feasibility corresponding B-spline pre-determined tolerance extraction