Rheology study of supercritically extracted tea-oil

Abstract

The rheological analysis on dynamic shear rate-viscosity relationship of tea-oil extracted from tea-oil tree seeds by supercritical extraction method was carried out at gradient temperatures and constant shear rate, respectively. The results show that at 20, 40, 60 and 80 ℃, once the shear rate increases gradually, the torque enlarges correspondingly, while the viscosity shows little difference. However, at the constant shear rate, the rising temperature results in a steady downtrend on tea-oil viscosity. This results reveal that tea-oil viscosity is not closely correlated with shear rate at constant temperature, yet negatively correlated with temperature at constant shear rate.

Characteristics of activated carbon remove sulfur particles against smog

“…Activated carbon with highly developed porous structure and huge specific surface area (Peng et al, 2013b), good chemical stability and thermal stability, high mechanical strength and surface contains a variety of oxygen containing functional groups (Wang et al, 2013; Peng et al, 2013c). What’s more, activated carbon, which contained potassium, calcium and other minerals, could have adsorption and filtration of extractives, oil, sulfur-based compounds, other matters (Liu et al, 2008, Zhang et al, 2008, Ling et al, 1999, Bautista-Toledo et al, 1994). Therefore, activated carbon has a strong adsorption, and at the same time can make high dispersed catalyst load system, and as a reducing agent to participate in the reaction, reduces the reaction temperature (Wang et al, 2009).…”

Adsorption characteristics of sulfur powder by bamboo charcoal to restrain sulfur allergies

“…Because the trait was due to the highly porous structure of the bamboo fabric, it could absorb sulfur-based compounds, nitrogen-based compounds and so on (Ignatova et al, 2003, Abe et al, 2001, Kawashita et al, 2003, Mizuta et al, 1994, Wang et al, 2006, Xue et al, 2014, Cui et al, 2014). What’s more, bamboo charcoal, which contained potassium, calcium and other minerals, could cause adsorption and filtration of extractives, oil, and other substances (Peng et al, 2013a, Xiao et al, 2013, Peng et al, 2013b, Wang et al, 2013, Peng et al, 2013c, Peng et al, 2012b, Peng and Le, 2012, Peng et al, 2011, Zhang et al, 2008, Qi et al, 2012), that was beneficial for people’s health. But so far, the bamboo charcoal in coal-fired flue gas pollution (sulfide, etc.)…”

Desulphurization characteristics of bamboo charcoal from sulfur solution

“…The highly porous structure of the bamboo fabric, could absorb sulfur-based compounds (Abe et al, 2001; Kawashita et al, 1994; Mizuta et al, 1994; Wang et al, 2006; Xue et al, 2014; Cui et al, 2014). What’s more, bamboo charcoal, which contained potassium, calcium and other minerals, could have adsorption and filtration of extractives, oil, and other substances (Peng et al, 2013a, Peng et al, 2013b, Peng et al, 2013c, Peng et al, 2012a, Peng et al, 2012b, Peng et al, 2011, Xiao et al, 2013, Wang et al, 2013, Liu et al, 2008, Zhang et al, 2008, Qi et al, 2012). That was beneficial for people’s health.…”