A paraffin-fueled SOFC system design and integration

This paper addresses an integrated design of paraffin-reformer, gas separations and the electricity production with a solid oxide fuel cell (SOFC). The overall design consists of three modules. First module is a system of paraffin reformer. In this module, the paraffin feed stream is to send to a steam-reformer. In the second module, the gas separations method illustrated is the combination of a methane-permeable membrane with a pressure-swing adsorption (PSA). In the third module, the purified hydrogen is fed to the SOFC unit. To be energy efficient, this paraffin-fueled SOFC system is designed with the consideration of heat integration. The intent of this paper is to provide a possible, alternative way of cogeneration systems for refinery and petrochemical plants.     

加氢催化剂的器外再生

介绍了国内外再生技术的发展状况，对比器内和器外再生技术的优缺点以及催化剂活性恢复率的差异，说明器外再生技术是催化剂再生的发展方向。     

异龙脑愈创木酚合成檀香的制备

以酸性白土为催化剂 ,进行异龙脑与愈创木酚的选择性烷基化反应 ,烷基化反应产物异龙脑基愈创木酚在雷尼镍存在下催化加氢 ,得到合成檀香异莰基环己醇混合物。该工艺所得合成檀香中主要成分含量较高 ,香气纯正 ,粘度较大 ,留香时间长 ,有一定的实用价值。     

Ionic conductivity and interfacial properties of polymer electrolytes based on PEO and boroxine ring polymer

Blended polymer electrolytes based on poly(ethylene oxide) (PEO) and boroxine ring polymer (BP) solvated with lithium triflate were formulated and evaluated. Compared to PEO–salt polymer electrolyte, ionic conductivities of blended polymer electrolytes were two orders of magnitude higher in a low‐temperature range; as well, lithium transference numbers were increased to ～ 0.4. These were due to the increased mobility and anion trapping of boroxine rings. BP also exhibited the stabilizing effect on lithium–polymer electrolyte interface, and a reduced interfacial resistance between lithium metal and the polymer electrolyte was found with increasing of BP content. Polymer electrolytes based on PEO and BP are suitable for use in lithium secondary battery. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 84: 17–21, 2002; DOI 10.1002/app.10090     

Ozonolysis of cyclododecene

Ozonolysis of cyclododecene was carried out to produce an w-formyl carboxylic acid (12-oxododecanoic acid) which is derived from zwitterion and aldehyde moiety that are formed during the reaction. The ozonolysis was performed to examine the product distribution under such reaction variables as temperature, kinds of solvent, and presence of catalyst. The yield of polymeric ozonide, which is undesirable product, was measured to be dominantly 86% without pyridine catalyst, whereas, only 10.25% with the catalyst. The optimum reaction condition was to be in MC (methylene chloride) solvent, and in the presence of equimolar olefin and pyridine catalyst at O°C, at which the yields of polymeric ozonide, 1,12-dodecanedialdehyde, 1,12-dodecanedicarboxylic acid, and 12-oxo-dodecanoic acid were 10.25%, 26.72%, 26.31%, and 36.72%, respectively.     

SO_4~（2－）／ZrO_2固体超强酸的失活与再生

初步探索了ＳＯ_４~２－／ＺｒＯ２固体超强酸的失活机理．并着重研究了催化剂的两种再生方法：灼烧法和溶剂洗涤法。催化剂主要是因结焦而失活，高温灼烧能基本恢复催化剂原有活性．且再生效果与灼烧温度有关。溶剂洗涤法有一定的再生能力，但不显著．     

A minimal kinematic model for serial robot calibration using POE formula

Traditional methods based on the product of exponentials (POE) formula are parametrically continuous and complete for the calibration of the kinematic parameters of serial robots. However, these methods are not minimal due to the constraints of joint twists. This paper puts forward a new POE-based model, whose parameters are totally independent and conform to the formula of minimality. This is the first model that simultaneously satisfies the requirements of parametric continuity, completeness, and minimality with uniform and generic modeling rules. The proposed approach avoids the operations of normalization and orthogonalization which are necessary redundancy elimination steps with the traditional model. Simulations on a SCARA robot and experiments on an ABB IRB 120 robot prove that the new model outperforms in convergence, accuracy, and efficiency.     

煤岩配煤技术的发展与现状

煤岩学在炼焦配煤技术上的应用,使炼焦配煤手段更有效,使焦炭质量预测在生产上应用成为可能,为定性的经验配煤技术跃变到定量的科学配煤技术创造了条件。夏皮洛煤岩配煤技术是目前较好的配煤方法,其相关系数可达0.93;国内许多学者在煤岩配煤方面也做了大量研究工作,有些相关系数达0.98。目前虽然各种方法存在一定局限性,但随着计算机和图像处理技术的发展,煤岩学在指导配煤技术方面将有新的突破。     

碘化钠催化合成1,4-二乙氧基苯的研究

以乙醇为溶剂，碘化钠为催化剂，由金属钠，对苯二酚和溴乙烷合成了1，4－二乙氧基苯，考察了影响收率的因素，最佳合成条件为：物料溴乙烷：对苯二酚：金属钠：碘化钠（摩尔比）为2．5：1：2．2：0．13，反应在回流温度下进行，反应时间2h，收率可达92．8％。     

从四氢呋喃、甲醇、水三元混合物系中分离四氢呋喃的研究

叙述了以液—液萃取、间歇精馏为手段，从四氢呋喃、甲醇、水三元混合物系中分离四氢呋喃的方法。四氢呋喃纯度超过９８％，收率６４．８％。