搜索结果: 91-105 共查到“知识库 化学工程”相关记录10477条 . 查询时间(3.79 秒)
Superstructure-Based Simultaneous Optimization of a Heat Exchanger Network and a Compression-Absorption Cascade Refrigeration System for Heat Recovery
Heat Exchanger Network Refrigeration System Heat Recovery
2023/6/19
A heat exchanger network (HEN) plays an important role in the chemical process industry owing to its significant effect in energy recovery. A compression-absorption cascade refrigeration system (CACRS...
Molecular simulation and optimization on the microporous structure in carbon molecular sieve membrane for CO2/CH4 separation
Carbon molecular sieve membrane Gas separation Molecular simulation Pore size Structure optimization
2023/6/19
Zigzag-type pore model with a modified structure was proposed to evaluate the effect of micropore structure on the gas separation performance of carbon molecular sieve membranes (CMSM). Molecular simu...
Highly selective production of renewable p-xylene from bio-based2,5-dimethylfuran and ethylene over Al-modified H-Beta zeolites
p-xylene ethylene Al-modified H-Beta zeolites
2023/6/19
Highly selective synthesis of renewable p-xylene (PX) from bio-based 2,5-dimethylfuran (DMF) and ethylene was successfully realized on H-Beta zeolite catalysts with further Al-modifications. The influ...
Post-modification of desilicated MFI zeolites by phosphorous promoter
Desilicated zeolites Acidity tailoring Phosphorous modification Glycerol dehydration
2023/6/19
Developments in microporous zeolites-base catalysts have evidenced the necessity of acidity tailoring in order to meet the exact requirements of specific reactions, which can be achieved by the post-m...
Fuzzy comprehensive assessment of running condition for a large-scale centrifugal compressor set
Compressor Condition assessment Mathematical modeling Maximal information coefficient Dynamic deterioration degree Prediction
2023/6/19
A fuzzy comprehensive assessment method of running condition was constructed and applied to a large-scale centrifugal compressor set in a petrochemical corporation aiming at the monitoring and early w...
Low-cost electrochemical filtration carbon membrane prepared from coal via self-bonding
Electrochemical filtration carbon membrane Caking coal Self-bonding Organic pollutants Oxidation mechanism
2023/6/19
Electrochemical filtration membranes are highly effective for wastewater treatment. However, their relatively high production cost may limit their large-scale production and industrial application. In...
Pyrolysis behaviors of coal-related model compounds catalyzed by pyrite
Pyrite Catalytic pyrolysis Coal-related model compounds Tetrahydronaphthalene
2023/6/19
The pyrolysis behaviors of coal-related model compounds (bibenzyl and benzyloxybenzene) were investigated on a fixed-bed reactor catalyzed by pyrite (main component is FeS2). The pyrolysis products we...
草酸溶液处理对SAPO-34分子筛物性和催化性能的影响
SAPO-34 分子筛 草酸溶液 MTO反应
2023/6/19
用XRD、SEM、N2物理吸附、XRF、ICP-AES以及NH3-TPD、FT-IR、固体NMR和固定床甲醇制烯烃技术(MTO)反应评价等表征手段,研究了草酸溶液处理对SAPO-34分子筛的改性作用.结果表明,用草酸溶液对SAPO-34分子筛进行后处理可以通过刻蚀骨架在晶体中产生大孔,调变孔道结构,改善微孔扩散性能;选择性地降低分子筛的骨架硅含量,从而降低分子筛的酸强度和酸中心密度.将改性前后的分...
Desulfurization of 2-phenylcyclohexanethiol over transition-metal phosphides
2-Phenylcyclohexanethiol Cycloalkyl C-S bond Desulfurization Ni2P MoP WP Transition-metal phosphosulfide Piperidine
2023/6/19
The desulfurization of 2-phenylcyclohexanethiol (2-PCHT) was studied over Ni2P, MoP, and WP under 4.0 MPa H-2 or Ar at 240 degrees C. The hydrodesulfurization of 2-PCHT proceeded through three paralle...
KOH改性活性炭及其对微量乙烷的吸附性能
活性炭 KOH改性 乙烷 穿透吸附量
2023/6/19
采用KOH改性椰壳活性炭(AC)作为吸附剂,调变KOH和AC的质量比(KOH/AC,以下简称碱碳比)和活化温度制备一系列改性吸附剂,通过动态吸附法评价其脱除微量乙烷的性能,并与AC进行对比研究.评价结果表明,最佳制备条件为:KOH和吸附剂的最佳碱碳比为0.5,最佳活化温度为800℃.在该条件下制备的KOH改性AC吸附剂的乙烷穿透吸附量达到482.1 μg/g,高于AC的169.6 μg/g.表征结...
女性体内塑化剂含量是男性的近6倍，背后有何原因？
塑化剂 有机化合物 化妆品 医疗用品
2023/6/2
塑料中的 “塑化剂”已污染空气、水、食品等环境，并由此暴露于人群而对健康产生一定的影响。厉曙光介绍了食品中“塑化剂”的污染情况，细胞和动物的毒理学实验，对相关人群的暴露现状以及相关的防制建议等，将他对“塑化剂”24年的研究结果作了总结汇报。
安徽省农业科学院科技成果：新产品纯丝胶系列化妆品（图）
安徽省农科院 纯丝胶系列 化妆品
2023/5/29
利用引进日本的丝胶品种资源和自主创新品种资源，采用远缘杂交、基因定向导入和重组、标记性状辅助系统选育方法，育成全天然纯丝胶蚕基础品种系列，为规模化应用丝胶提供材料保障。通过一种双亲性丝胶蛋白聚合物的制备方法与聚合物的应用技术手段，与企业联合开发丝胶化妆品一套，具有亲肤、保湿、美白等功效，深受消费者喜爱。