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Quick Assessment of Potential Hydrate Promoters for Rapid Formation 被引量:3
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作者 Chi Y. Lo p. somasundaran Jae W. Lee 《Geomaterials》 2012年第4期63-69,共7页
Hydrate technology has advanced to greater proportions: implementing the high latent heats as refrigerant, safe carbon capture as carbon sequestration in hydrates, purifying rare gases in hydrates, and safe efficient ... Hydrate technology has advanced to greater proportions: implementing the high latent heats as refrigerant, safe carbon capture as carbon sequestration in hydrates, purifying rare gases in hydrates, and safe efficient transport of energy using rapid hydrate formation. These account for only a small amount of the fundamental understanding of gas hydrates and the use of such a novel technology. A quick and broad analysis of novel hydrate promoters is needed to assess the potential of other promoter agents. This will improve the understanding of rapid hydrate formation and fundamental ideas related to the kinetics and formation of hydrates. There are still hundreds of other surfactants that have not been identified for rapid formation. The insurmountable endeavor deters many from trying as it can be like finding a needle in a hay stack. This almost futile endeavor of correctly identifying a surfactant as a promoter agent without doing a formation test can be accomplished with recent techniques. Using Raman and a liquid hydrocarbon (Cyclo-pentane), surfactants may shift the sample’s peak towards the hydrate peak (890 cm–1), thereby identifying it as a choice surfactant for rapid formation of hydrates. With a broad survey of surfactants, understanding fundamental science and engineering kinetics for hydrates will be easily achieved. Finding more effective and novel surfactants for hydrate formations will broaden the field of hydrates and self-assembling crystallization. As hydrate technology broadens, interdisciplinary fields can contribute expertise from surface science to spectroscopy leading to geological formations and engineering kinetics. 展开更多
关键词 GAS HYDRATE PROMOTER Technology CLATHRATE
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聚合物吸附和构型在选矿中的作用
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作者 p. somasundaran 卢毅屏 《国外金属矿选矿》 1992年第12期23-27,共5页
细粒矿物的絮凝通常是使用聚合物而产生的,然而聚合物吸附和构型影响絮凝的机理目前尚不清楚。本文多途径地研究了氧化铝悬浮液各种絮凝效应与聚丙烯酸在矿粒表面的吸附和构型的关系。测定了氧化铝悬浮液的浊度、沉降固体产率和沉积物... 细粒矿物的絮凝通常是使用聚合物而产生的,然而聚合物吸附和构型影响絮凝的机理目前尚不清楚。本文多途径地研究了氧化铝悬浮液各种絮凝效应与聚丙烯酸在矿粒表面的吸附和构型的关系。测定了氧化铝悬浮液的浊度、沉降固体产率和沉积物高度以及同一样品中的聚合物吸附量,吸附的聚合物分子构型和覆盖了聚合物的矿粒的ξ电位。使用芘为探针,用萤光光谱检测聚合物在固液界面下的构型。研究了吸附的聚丙烯酸以卷曲、伸展和从卷曲到伸展三种构型存在时细粒的絮凝行为。当聚丙烯酸呈卷曲态或伸展态时,悬浮液只有轻微的絮凝,而在从卷曲到伸展的构型状态(体系中聚丙烯酸先呈卷曲态,随pH增大而转为伸展态),悬浮液的絮凝或分散取决于pH值和聚丙烯酸吸附量的相应变化。 展开更多
关键词 选矿 高聚物 吸附 构型
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