微波热处理再生颗粒状活性炭的研究

本文利用微波热处理法,分别在大气和氮气气氛两种情况下快速再生了已经充分吸附SO2的颗粒状活性炭.微波热处理过程中,应用红外热成像技术,采集了样品的一系列热图像,直观显示了温度分布,表明热处理的最高温度仅为300℃.将再生产物用于模拟烟气脱硫实验,结果表明大气气氛下,微波再生活性炭的脱硫性能还不及原炭的一半;换以氮气气氛隔绝空气后,其脱硫性能提升到原炭的97%.隔绝空气条件下的微波热处理再生法比传统热再生方法,降低了处理温度、极大缩短了再生时间,体现了高效、低能耗两大优势.     

吸附SO2饱和活性炭纤维的微波解吸性能研究

通过微波辐照再生吸附SO2饱和的活性炭纤维的实验研究发现，连续六次吸附、解吸后，活性炭纤维吸附容量明显提高，更易被解吸，SO2回收率维持在93％以上，最终活性炭纤维的损耗率在10％以内。实验中的最佳解吸操作条件为微波辐照功率700W、辐照时间240s、空床气速0．071m／s、床层厚度40mm。结果表明，微波解吸具有解吸时间短、吸附容量恢复好、活性炭纤维损耗率较低、解吸气体浓度高、S02便于回收等优点，具有很好的经济实用性。     

活性炭的微波制备和再生技术研究进展

介绍了国内外关于微波在活性炭上的应用,包括活性炭的制备、再生和催化活化方面.阐述了微波条件下的活性炭在吸附性、再生性等方面的优点.并评述了未来的发展趋势.     

微波场中活性炭升温行为的影响因素研究

吸附法脱硫技术中的一个关键问题是活性炭的再生.微波作为一种新型的热处理技术,具有作用时间短、加热均匀和再生成本低等优点。本文从理论和实验两个层面研究了微波场中活性炭升温的主要影响因素。结果表明,活性炭的升温速率和温度最大值随微波输入功率增大而增大,随载气量增加而减小,而与活性炭质量关系不甚密切,实验结果与理论推导基本吻合。     

采用低温微波法和电加热法再生载甲苯活性炭

采用低温微波法(60、120、180 W)和电加热法对载甲苯松木活性炭进行再生。比较了这两种再生方法下活性炭的再生效率、升温速率、能耗,并分析了再生前后活性炭的物理化学性能。结果表明:经过5次吸附—微波辐射再生之后,活性炭吸附量基本保持原有吸附量的45%。随着微波功率从60 W 升高到120 W,再生时间从60 min降低到22 min,再生效率从1.7%/min增加到4.5%/min。而传统电加热再生法再生时间为180 min, 是微波法的3～6倍; 功率为60 W的微波加热法的升温速率为178 ℃/min,而电加热法升温速率只有9 ℃/min; 从能耗角度看,微波再生法的能耗为29.7 kJ/g,而电加热法的能耗则为74.3 kJ/g; 并且经检测微波法再生后活性炭的孔隙结构和官能团未发生改变。     

甘蔗渣微波制备活性炭吸附剂及其再生研究

以甘蔗渣为原料,氯化锌、磷酸和氢氧化钠为活化剂,微波制备活性炭吸附剂,考察了活化剂浓度、料液比、浸渍时间、微波功率和辐射时间等对活性炭产率和吸附性能的影响.活性炭指标为:亚甲基蓝吸附值136 mL/g,碘的吸附值1 163.7mg/g,A法焦糖脱色率108.9%,优于国家一级品指标.用该活性炭处理酱油模拟废液后再生,其亚甲基蓝吸附值为105mL/g,碘的吸附值为1 186.4mg/g,A法焦糖脱色率为111.5%,仍优于国家一级品指标,并且再生活性炭对酱油废液具有更佳的处理效果.该方法操作方便,缩短了活性炭的制备和再生时间,再生效果好.     

固定床活性炭脱硫动态传质过程分析

对活性炭法烟气脱硫技术中SO2在活性炭催化剂中的传质过程进行分析,提出固定床SO2有效传质速率的概念,并建立相应的数学模型.以微孔扩散动力学方程为依据,对不同类型活性炭的SO2粒内扩散系数和内表面利用率进行了测定.结果表明,微孔型活性炭的SO2粒内扩散系数小于中孔型活性炭;活性炭的SO2粒内扩散系数在水洗脱附条件下降至无水情况时的34%~47%;粒内扩散阻力是活性炭的活性位大量失效的原因;小颗粒活性炭的内表面利用率高于大颗粒活性炭.     

活性炭吸附苯酚及其微波辐照再生效果

考察预处理后颗粒活性炭(GAC)对苯酚的吸附行为,探讨微波辐照再生吸附苯酚活性炭的机理,确定GAC达到吸附平衡的时间及吸附过程符合的等温吸附模型.实验结果表明:3 h后GAC吸附基本达到平衡,吸附过程符合Freundlich等温吸附模型,最大平衡吸附量为143.7 mg/g.对吸附饱和苯酚GAC进行微波辐照再生研究,实验结果表明:最佳的再生条件为微波功率520 W,再生时间15 min,GAC用量为6 g,此时GAC再生效率为86.5%.     

微波加热在活性炭再生中应用研究进展

随着微波技术的发展,基础理论研究不断增强及人们对低能耗、环境友好技术要求的提高,微波技术在活性炭加工方面将倍受关注,文中阐述了微波加热在活性炭再生中的应用研究进展。     

活性炭的改性、回收、再生及应用的研究进展

本文重点对活性炭的改性和再生方法及活性炭应用的研究进展进行了综述。重点阐述了几种改性方法的优缺点,对热再生、化学药品再生、微波/超声波再生、光催化再生及Fenton再生等不同的再生方法进行了讨论,并介绍了改性活性炭在水净化、空气净化、重金属回收等方面的应用。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.