A number of experiments regarding hydrodynamics have been carried out in the open turbinerotating disc contactor using quartz particles as solid phase,tap water and kerosene as liquid phase.Flooding phenomenon has bee...A number of experiments regarding hydrodynamics have been carried out in the open turbinerotating disc contactor using quartz particles as solid phase,tap water and kerosene as liquid phase.Flooding phenomenon has been observed.The variables studied include the rotor speed,compartment heigh,stator ring opening,column diameter and the superficial velocity of eachphase Correlations for predicting the solid phase holdup and characteristic velocity have been devel-oped.In comparison with liquid-liquid system,the presence of solid particles will result in higherdispersed phase holdup but lower characteristic velocity and total throughput.展开更多
茶酒是茶和酒结合的产物,成分组成及风味复杂,研究采用液液萃取和顶空固相微萃取结合全二维气相色谱-飞行时间质谱联用(comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry,GC×GC-TOF/MS)分析茶...茶酒是茶和酒结合的产物,成分组成及风味复杂,研究采用液液萃取和顶空固相微萃取结合全二维气相色谱-飞行时间质谱联用(comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry,GC×GC-TOF/MS)分析茶酒及其基酒的挥发性成分组成和相对含量。结果显示,茶酒中分析鉴定出366种挥发性组分,包括酯类化合物136种,醇类39种,醛酮类48种,酸及酸酐30种,酚类4种,呋喃类16种,含氮化合物31种,萜烯类7种,含硫化合物6种,醚类7种,烷类14种,其他化合物28种。液液萃取和顶空固相微萃取结合GC×GC-TOF/MS的分析方法可快速、全面分析鉴定茶酒中各类挥发性组分,结果对于明确茶酒物质基础具有重要意义,为茶酒的风味体系、风味融合和健康属性研究提供了科学支撑。展开更多
文摘A number of experiments regarding hydrodynamics have been carried out in the open turbinerotating disc contactor using quartz particles as solid phase,tap water and kerosene as liquid phase.Flooding phenomenon has been observed.The variables studied include the rotor speed,compartment heigh,stator ring opening,column diameter and the superficial velocity of eachphase Correlations for predicting the solid phase holdup and characteristic velocity have been devel-oped.In comparison with liquid-liquid system,the presence of solid particles will result in higherdispersed phase holdup but lower characteristic velocity and total throughput.
文摘茶酒是茶和酒结合的产物,成分组成及风味复杂,研究采用液液萃取和顶空固相微萃取结合全二维气相色谱-飞行时间质谱联用(comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry,GC×GC-TOF/MS)分析茶酒及其基酒的挥发性成分组成和相对含量。结果显示,茶酒中分析鉴定出366种挥发性组分,包括酯类化合物136种,醇类39种,醛酮类48种,酸及酸酐30种,酚类4种,呋喃类16种,含氮化合物31种,萜烯类7种,含硫化合物6种,醚类7种,烷类14种,其他化合物28种。液液萃取和顶空固相微萃取结合GC×GC-TOF/MS的分析方法可快速、全面分析鉴定茶酒中各类挥发性组分,结果对于明确茶酒物质基础具有重要意义,为茶酒的风味体系、风味融合和健康属性研究提供了科学支撑。