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一种新的评估MTO反应生焦量大小的方法
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作者 白永伟 麻丽娟 《石油与天然气化工》 CAS 北大核心 2017年第4期53-56,共4页
从能量守恒角度对MTO反应生焦量的大小进行了评估。MTO反应过程中生成的焦炭附着在分子筛催化剂的活性中心上,导致催化剂失活,为恢复催化剂活性,催化剂需再生烧焦。由于焦炭燃烧释放的能量被用于生产蒸汽,所以计算生产蒸汽过程的焓变大... 从能量守恒角度对MTO反应生焦量的大小进行了评估。MTO反应过程中生成的焦炭附着在分子筛催化剂的活性中心上,导致催化剂失活,为恢复催化剂活性,催化剂需再生烧焦。由于焦炭燃烧释放的能量被用于生产蒸汽,所以计算生产蒸汽过程的焓变大小就能体现焦炭量的大小。利用工业上通用的水蒸气热力学性质计算公式IAPWS-IF97,对某企业MTO装置两个汽包在不同温度、压力条件下,产汽过程焓变进行计算。通过软件SigmaPlot 13.0对焓变数据进行处理,得出产汽过程焓值变化公式,进而得出单位质量甲醇由于生成焦炭而损失能量大小的公式,为调整MTO反应操作条件、降低生焦量提供了指导。 展开更多
关键词 甲醇制烯烃 生焦量 产汽过程 焓变
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Material selection of polymeric composite automotive bumper beam using analytical hierarchy process 被引量:3
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作者 A.HAMBALI S.M.SAPUAN +1 位作者 N.ISMAIL Y.NUKMAN 《Journal of Central South University》 SCIE EI CAS 2010年第2期244-256,共13页
Selection of materials,as an area of design research,has been under considerable interest over the years.Materials selection is one of the most important activities in the product development process.Inappropriate dec... Selection of materials,as an area of design research,has been under considerable interest over the years.Materials selection is one of the most important activities in the product development process.Inappropriate decision of materials can cause the product to be reproduced or remanufactured.To avoid this circumstance,one of the useful tools that can be employed in determining the most appropriate material is analytical hierarchy process(AHP).To illustrate the application of AHP,six different types of composite materials were considered.The most appropriate one for suitability of use in manufacturing automotive bumper beam was determined by considering eight main selection factors and 12 sub-factors.The AHP analysis reveals that the glass fibre epoxy is the most appropriate material because it has the highest value(25.7%,mass fraction) compared with other materials.The final material is obtained by performing six different scenarios of the sensitivity analysis.It is proved that glass fibre epoxy is the most optimum decision. 展开更多
关键词 COMPOSITE polymer matrix bumper beam analytical hierarchy process
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