Modeling and optimization of the cyclic steady state operation of adsorptive reactors

Adsorptive reactors(AR),in which an adsorptive functionality is incorporated into the catalytic reactors,offer enhanced performance over their conventional counterparts due to the effective manipulation of concentration and temperature profiles.The operation of these attractive reactors is,however,inherently unsteady state,complicating the design and operation of such sorption-enhanced processes.In order to capture,comprehend and capitalize upon the rich dynamic texture of adsorptive reactors,it is necessary to employ cyclic steady state algorithms describing the entire reaction-adsorption/desorption cycle.The stability of this cyclic steady state is of great importance for the design and operation of adsorptive reactors.In this paper,the cyclic steady state of previously proposed novel adsorptive reactor designs has been calculated and then optimized to give maximum space–time yields.The results obtained revealed unambiguously that an improvement potential of up to multifold level could be attained under the optimized cyclic steady state conditions.This additional improvement resulted from the reduction of the regeneration time well below the reaction-adsorption time,which means,in turn,more space–time yield.

跨越钢铁屏障——美国钢保措施及其连锁效应的影响与对策分析

美国在国内外经济增长衰退和钢铁产业衰落条件下 ,根据国内立法第 2 0 1条款出台的钢铁保障措施 ,因以损害他国正当利益为条件而谋求本国利益最大化必然导致贸易争端。我国作为钢铁生产和消费大国必受美国贸易保护及其连锁效应的损害 ,因此 ,在遵循WTO规则和不断调适外贸政策目标条件下 ,采取相应对策维护正当贸易利益和保护钢铁产业健康发展是情势所迫。

企业永续债融资条款设计与市场反应——基于四家上市房地产公司的多案例研究

本文以永续债的条款设计为研究起点,首先选取四家房地产上市公司作为研究样本,通过对比永续债发行条款,发现企业在永续债基础性条款设计呈现趋同化的发展趋势,对投资人保护性条款(触发机制和救济机制)的设计体现出差异性和创造性。其次利用事件研究法,观察设置不同条款的永续债在发行后的资本市场反应,揭示了市场对企业永续债融资的反应呈现出从抵触到接纳的动态变化,同时发现市场对投资人保护条款的态度因企业产权性质不同而存在差异:国有企业永续债融资设立投资人保护条款市场反应积极,民营企业永续债融资设立投资人保护条款市场反应消极。本文分析这些现象背后的原因,论证了永续债条款设计与资本市场反应之间的逻辑关系,打破了之前的学术研究中两者简单的罗列关系,对该领域研究做出有益补充,为永续债市场各方参与者提供有价值的参考信息。