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It is found that the crystallite size and the conductivity of PFA pyrolyzed at 600℃ decrease with increasing heat-treatment time.
研究发现,600℃热解的PFA的晶粒尺寸和电导率随热解时间的延长而减小;在700℃以上热解PFA时,热解碳的晶粒尺寸和电导率随热解温度的升高而增大。
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At this stage, the solid pyrolyzed products of polysiloxane and polycarbosilane were amorphous silicon oxycarbide and nonstoichiometric silicon carbide containing excess carbon, respectively At higher temperature, structure of the amorphous pyrolyzed products started to rearrange and experienced a disorder →order transformation, even crystallized Cristobalite crystallized from SiO〓C〓, and β-SiC also crystallized from SiO〓C〓 provided carbon content of the starting polysiloxane was high enough, while β-SiC crystallized from SiC〓.
当热解温度达1000℃时,聚合物先驱体的无机化过程已基本完成,其陶瓷转化率值趋于稳定,此时聚硅氧烷的热解产物为非晶态的氧碳化硅,聚碳硅烷的热解产物则为含过量碳的非化学计量比的非晶态碳化硅;随着热解温度的升高,非晶态热解产物的结构逐步调整,发生无序→有序的相变,以至析晶。
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In this study,TGA and self-made vacuum pyrolysis apparatus were used to detect the characteristics of biomass pyrolysis liquation and the rules of preparation of activated carbon under vacuum.The seven kinds of common agricultural and forestry waste biomass were from Yiyang. The main contents studied are as follows:(1) TGA was used to detect the influence of biomass species and heating rate on the pyrolysis reaction.
本研究采用真空热重分析仪和自制的真空热解实验装置,对益阳地区7种农林废弃生物质进行了真空热重、真空热解液化和真空化学活化等实验研究,以探讨生物质真空热解特性行为和生物质真空化学活化法制备活性炭的规律等,主要内容包括以下几个方面:(1)对7种生物质进行了真空热重分析,考察了不同生物质原料、升温速率对生物质真空热解反应的影响。
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The temperature effect on the oil yield was discussed at first. Then, analytical work was carried out as follows: the ultimate analysis and physi-chemical analysis of the pyrolytic oil comprised a sketch of the fuel properties of the oil; Then, through the distillation analysis of the oil, the fraction composition of the "unrefined"oil was known. After that, a general knowledge of the aromaticity and saturation of the hydrocarbons in the oil was provided by the outcome of the FT-IR functional group analysis. Also, from the analysis, the form of the polar functional groups and their distribution in different fractions of the oil were learned.
文中首先对不同热解温度下热解油产率进行分析讨论,然后,针对热解油品质进行了一系列分析:通过元素组成和理化特性的分析,对热解油作为燃料特性有了一个大致了解;通过实沸点蒸馏分析,得到热解油作为一种未提炼油的馏分分布,并为后续热解油馏分的细入分析提供了前提;通过对热解全油和各窄馏分的FT-IR官能团分析,对热解油的芳香性、不饱和性有了整体的了解,并且清楚了热解油中的极性官能团存在型式及其在热解油不同馏分中的分布。
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Database of physical and chemical properties for solid wastes were constructed through investigation for single typical component and their mixture of solid wastes. The particulate trajectory model and heat transfer model were developed, based on the studies of Characteristics of solid wastes movement and heat mass transfer in rotary kiln. Pyrolysis experiments of solid wastes in lab and pilot scale rotary kiln pyrolyzers were performed. Mechanism of pyrolysis for typical solid wastes was analyzed. The characteristics of pyrolytic products, such as physical and chemical properties, composition and combustibility, etc, were investigated. A neural network model for the prediction of yields and properties of pyrolysis products was developed. Then, the potential applications of pyrolytic products and the substitution of pyrolytic fuels for corresponding commercial furls were investigated. The optimization of energy recovery and utilization for different wastes through pyrolysis was analyzed.
通过对典型固体废物组分及其混合物特性的分析,建立了固体废物的化学特性分析数据库,并据此进行了物理分类;对固体废物在回转窑内的运动和传热特性进行了研究,建立了固体物料的随机颗粒滚动理论模型和传热模型;在小型和中试回转式热解炉上进行了实验;对各种典型固体废物在回转窑内的热解机理和主要热解产物的性质进行了研究;利用神经网络等方法建立了各典型固体废物的热解产物的产率及特性的数学预测模型;对固体废物热解产物的物性、成分、燃烧特性等开展了研究,分析了其与现有商业燃料匹配的可能性;对热解产物的多种应用性能进行了研究,对不同废物热解中的能源回收和利用进行了优化分析。
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Three thermal degradation subzones analysis methods, the whole pyrolysis zones, the main compounds pyrolysis zones, and the active and passive pyrolysis zones, were applied.
采用了生物质整体热解分区、生物质化学组分热解分区、活化热解与消极热解分区等三种热解分区方法进行分析。
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But when Fe/D113 precursor is pyrolysed in the range of 400-700℃, the crystal structure of the iron particle is different. The products are mainly iron oxides andα-Fe as Fe/D113 precursor pyrolysed at 500℃, and as the pyrolytic temperature increases to the range of 600-700℃,α-Fe and Fe_3C are observed. Meanwhile, Al_2O_3、MgO、MgAl_2O_4 were observed in Al/C, Mg/C, Al-Mg/C which were prepared from D113 resin at 1000-1300℃.
而在同样的条件下热解载铁树脂(Fe/D113),热解产物中铁的晶体结构与热解温度有关,400℃热解产物为铁的氧化物;500℃热解产物为体心立方结构的单质铁;600-700℃的热解产物为bcc单质铁和铁的碳化物(Fe_3C)。1000-1300℃热解含Al、Mg及Al-Mg的D113树脂制得的Al/C、Mg/C、Al-Mg/C材料中Al、Mg主要以Al_2O_3、MgO、MgAl_2O_4形式存在。
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The results indicate the mutual effect exists between the single coals, which could increase the maximum of thermal weight loss obviously and has a small effect on the temperature extent of the weight loss. The main pyrolysis production of coal is coke, but the main production of waste plastics is tar; the yield of water became decrease and the gas became increase by adding the waste plastics. And the CRI and CSR decreased with the ratio of waste plastics in coal. The main ingredients of tar from blend coal are aromatic hydrocarbon and alkane, while those of waste plastics are alkane and alkene. The result of co-coking with coal and waste plastics make the light tar and the aromatic hydrocarbon increase obviously. The combustible ingredient(CO、H2、CH4) of gas from co-coking with coal increase at different ratio; Co-coking with coal and waste plastics could increase the combustible ingredient and thermal value of gas.
结果表明,废塑料与煤混合物在煤的塑性温度区间内存在明显的相互作用,使最大热解失重峰迁移,热解速率变大,且随着废塑料配比的增加呈现规律性的变化;煤热解产物固体焦炭为主,而废塑料的热解产物以焦油为主,废塑料的添加使得总体焦炭和水产率下降,焦炉煤气和焦油的产率增加,即共焦化呈现出明显的&增油减水&效应;随着塑料添加量的增加,焦炭热强度呈现劣化趋势;废塑料代替瘦煤配煤炼焦可使其比例提高到3%而不影响焦炭的质量;纯煤焦化所得焦油以芳香烃类和烷烃类为主,而废塑料热解焦油以烷烃和烯烃为主;废塑料配煤炼焦,可使得的焦油呈现&环构化&和&轻质化&趋势;废塑料的添加可使煤气中的可燃组分(CO、H2、CH4)的含量均有不同程度的增加;废塑料配煤炼焦可以优化焦炉煤气的组成,增加煤气中的可燃组分,提高焦炉煤气的热值。
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Then quality upgrading scheme was explored in order to solve the high content of sulphur and nitrogen in pyrolytic oil, low flash point as well. Yields of pyrolysis of scrap tires in a pilot-scale rotary kiln under 550℃were firstly summarized. Then elemental composition and physiochemical properties were analyzed on both pyrolytic crude oil and its fractions. Based on these researches, the feasibility that pyrolytic oil is used as fuel was discussed. From FT-IR spectra the functional group compounds were generally acquainted, and by column chromatography analysis chemical compositions were clearly known. Then through GC analysis the absolute content of BTX in pyrolytic crude oil was defined.
本文首先考察了中试回转窑550℃下的废轮胎热解产率及热解原油的元素组成和理化特性,对其作为燃料使用的可行性进行了分析;通过实沸点蒸馏研究了轻质、中质馏分热解油的基本特性:红外分析得出了有代表性馏分热解油的大致官能团组成形式,对热解油的强芳香性和部分不饱和性有了整体了解;化学族组成分析进一步了解了热解油内在化学族组成和含量,对热解油的内在性质有了更为深入理解;气相色谱分析对热解油中富含的苯、甲苯和二甲苯进行绝对定量,为热解油提取BTX化工原料的经济性提供了参考。
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Experimental results showed that vacuum pyrolysis disciplinarians of scrap PCB are decided by pyrolysis conditions. Pyrolysis temperature is the key factor among all the pyrolysis conditions and other factors have influence on distribution of pyrolysis products too.
试验结果表明,热解条件决定废线路板的真空热解规律,热解终温是影响热解产物产率分布的最重要的热解条件,其它热解条件对热解产物产率分布也有一定影响。
- 更多网络解释与热解相关的网络解释 [注:此内容来源于网络,仅供参考]
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pyrolysis:热解
煤的热解是指煤在隔绝空气或在惰性气体条件下持续加热至较高温度时,所发生的一系列物理变化和化学反应的复杂过程. 粘结和成焦则是煤在一定条件下的热解的结果. 由于命名尚未统一,除"热解"(Pyrolysis)这一名称外,还常用"热分解"(thermal decomposition)和"干馏"(carbonization)等术语.
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pyrolysis apparatus:热解器
pyrolysis analysis 热解分析 | pyrolysis apparatus 热解器 | pyrolysis chamber 热解室
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Thermolysis:热解
thermogravimetric analysis 热解重量分析 | thermolysis 热解 | thermomagnetic analysis 热磁分析
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pyrolytic reaction:热解反应
pyrolytic oxide 热解氧化物 | pyrolytic reaction 热解反应 | pyrolytically deposited layer 热解淀积层
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pyrolytic graphite:热解石墨,高温分解石墨
pyrolytic deposition process 热解沉积法 | pyrolytic graphite 热解石墨,高温分解石墨 | pyrolytic infiltration 热解渗滤
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pyrolytic deposition:热解淀积
pyrolytic decomposition 热解 | pyrolytic deposition 热解淀积 | pyrolytic oxide 热解氧化物
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pyrolyzing apparatus:热解器
pyrolyzer ==> 热解器,裂解炉 | pyrolyzing apparatus ==> 热解器 | pyrolyzing furnace ==> 热解炉
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pyrolyzed polymer:热解聚合物
pyrolytic-graphite semiconductor 热解石墨半导体 | pyrolyzed polymer 热解聚合物 | pyrolyzed polymer semiconductor 热解聚合物半导体
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pyrolyzed polymer:热解聚合物,热解聚合物半导体
pyrolyzed substance ==> 热解物 | pyrolyzed-polymer ==> 热解聚合物,热解聚合物半导体 | pyrolyzer ==> 热解器,裂解炉
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pyrolyzed substance:热解物
pyrolyze ==> 热解 | pyrolyzed substance ==> 热解物 | pyrolyzed-polymer ==> 热解聚合物,热解聚合物半导体