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植物纤维素蒸爆及水解技术通过鉴定我院和东台市粮油机械厂合作完成的植物纤维素蒸爆及水解技术研究项目在化工部科技司主持下,于1993年12月24日在南京通过专家鉴定。该蒸爆技术对玉米棒芯、玉米秸杆、稻草等蒸爆裂解取得了良好的结果,蒸爆处理后的玉米棒芯多糖... 相似文献
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蒸爆技术及其在植物纤维素资源中的应用 总被引:4,自引:0,他引:4
介绍了蒸爆原理,类型和几种蒸爆工艺条件。同时还介绍了蒸爆在植物纤维素水解和制无胶板中的应用,此外本文还对蒸爆设备作简要描述。 相似文献
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介绍蒸爆原理,类型和几种蒸爆工艺条件。同时还介绍了蒸爆在植物纤维素水解和制无胶板中的应用,此外还对蒸爆设备作了简要描述。 相似文献
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以甘蔗渣为原料,对蒸爆预处理进行了研究,考察了蒸爆压力和时间对甘蔗渣水解的影响。并研究了稀酸蒸焊对还原糖得率的影响。 相似文献
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蒸爆予处理甘蔗渣的主要影响因素是压力和处理时间,实验主要考察蒸爆压力和时间对甘蔗渣水解的影响和稀酸蒸 爆对还原糖得率影响。实验设备: 间歇蒸爆器, 方法: 甘蔗渣 30 g于蒸爆器中密封,升温至一定压力,维持若干时间,卸压后,取出物料于恒温水浴中酸解 2 h,测还原糖浓度变化。压力 与时间选取 0 6、 1 0、 1 6 MPa, 3、 5、 6 5、 8、 10min,结果: 0 6 MPa糖浓度较低并随时间增加而增加 ,1 0MPa浓度整体升高, 8min出现最高值 ;1 6 MPa、 5 min出现最高值,较高压力下时间对浓度影响较大。蒸爆后酸解、还原糖得率随压力增… 相似文献
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纳米纤维素环保高效制备研究进展? 总被引:1,自引:0,他引:1
《纤维素科学与技术》2019,(1):72-79
概述了纳米纤维素的制备研究现状及环保化发展趋势。重点对通过多物理场耦合蒸爆可控解离天然植物纤维素获得结构和性质可调的纳米纤维素进行了展望,指出了蒸爆技术应用于纳米纤维素高效环保制备需解决的主要问题,提出新型纳米纤维素制备技术朝着高效、环保的方向发展。 相似文献
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D. G. Gordeev L. F. Gudarenko M. V. Zhernokletov V. G. Kudel’kin M. A. Mochalov 《Combustion, Explosion, and Shock Waves》2008,44(2):177-189
A semi-empirical equation of state for metals is described. Its capabilities are demonstrated by the example of the equation
of state for aluminum. New experimental data are presented on the location of the isentrope of aluminum for unloading from
the state at p = 229.71 GPa on the shock adiabat to an aerogel (SiO2) of density 0.08 g/cm3.
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Translated from Fizika Goreniya i Vzryva, Vol. 44, No. 2, pp. 61–75, March–April, 2008. 相似文献
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乙烯酮(双乙烯酮)是十分重要的化工中间体,其下游产品较多。江苏某化工厂开发生产乙烯酮(双乙烯酮)下游产品三十多个,年生产规模三万多吨,是国内以乙烯酮(双乙烯酮)为中间体生产精细化学品的综合骨干企业。针对乙烯酮(双乙烯酮)下游产品废水特点,该厂结合企业实际,开展了产品优化,结构调整,清洁生产,资源循环利用,节水降耗等工作,从源头削减了污染物的生产。同时投资二千多万元新建预处理装置三套,6000m3/d废水生化处理装置一套,使全厂乙烯酮(双乙烯酮)下游产品的废水得到了有效的治理。 相似文献
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Jorge Marcelo Romero Soledad Bustillo Hugo Enrique Ramirez Maisuls Nelly Lidia Jorge Manuel Eduardo Gómez Vara Eduardo Alberto Castro Alicia H. Jubert 《International journal of molecular sciences》2007,8(7):688-694
A thermochemical rather simple experimental technique is applied to determine the enthalpy of formation of Diperoxide of ciclohexanone. The study is complemented with suitable theoretical calculations at the semiempirical and ab initio levels. A particular satisfactory agreement between both ways is found for the ab initio calculation at the 6–311G basis This set level. Some possible extensions of the present procedure are pointed out. 相似文献
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醋酸纤维素取代基分布与性质的关系 总被引:9,自引:0,他引:9
分析了以吡啶为溶剂的醋酸纤维素的13C-NMR核磁共振谱,得出了三种不同位置羟基的取代度。结合X—射线和DSC分析,初步说明具有相同取代度但未经水解和经过水解的醋酸纤维素(CA) 性质上的差异是由于三个羟基上的取代度分布不同及消晶程度差异所致。 相似文献
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介绍了平板硫化机热板中高度在硫化排气过程中的作用及其实现途径和评价方法;提出了设置热板中高度时应遵守的"刚性横梁、柔性热板"概念和"最短路径、最小排气阻力"原则;探讨了横梁热变形对热板中高度的影响。结果表明,参考横梁热变形设置的热板中高度有助于解决平板硫化机在复杂状态下硫化制品时的表面排气问题。 相似文献
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The objective of the study was to explore the effect of the degree of deacetylation (DD) of the chitosan used on the degradation rate and rate constant during ultrasonic degradation. Chitin was extracted from red shrimp process waste. Four different DD chitosans were prepared from chitin by alkali deacetylation. Those chitosans were degraded by ultrasonic radiation to different molecular weights. Changes of the molecular weight were determined by light scattering, and data of molecular weight changes were used to calculate the degradation rate and rate constant. The results were as follows: The molecular weight of chitosans decreased with an increasing ultrasonication time. The curves of the molecular weight versus the ultrasonication time were broken at 1‐h treatment. The degradation rate and rate constant of sonolysis decreased with an increasing ultrasonication time. This may be because the chances of being attacked by the cavitation energy increased with an increasing molecular weight species and may be because smaller molecular weight species have shorter relaxation times and, thus, can alleviate the sonication stress easier. However, the degradation rate and rate constant of sonolysis increased with an increasing DD of the chitosan used. This may be because the flexibilitier molecules of higher DD chitosans are more susceptible to the shear force of elongation flow generated by the cavitation field or due to the bond energy difference of acetamido and β‐1,4‐glucoside linkage or hydrogen bonds. Breakage of the β‐1,4‐glucoside linkage will result in lower molecular weight and an increasing reaction rate and rate constant. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 90: 3526–3531, 2003 相似文献