Sentence examples for selectivity about from inspiring English sources

For acetic acid production, a pressure of about 300 psig gives acetic acid selectivity about 20%, and ethylene selectivity about 70%.

Accordingly, the MIPs were used as a solid phase extraction (SPE) sorbent for the extraction and enrichment of PAHs in mixed samples to evaluate the selectivity about the MIPs.

A high selectivity (about 97%) of phenol formation at about 3.5% conversion of benzene was achieved over catalysts containing Ca and Cu ions in the cation part of hydroxyapatite.

By adjusting the diffusion rate to the chemical reaction rate for producing olefins within the ZSM-5 zeolite layer, olefins were successfully produced at a high selectivity (about 80 90%) from methanol at high conversions of 60 98%.

Here's background and a "larger than life" exercise to help build consciousness and selectivity about your physicality.

Under these conditions, the yield is above 95% for a selectivity of about 6.6‰.

At 150°C, the oxygen and nitrogen permeabilities were about 2.6 and 3.8 times higher than those at 20°C, respectively, but the O2/N2 selectivity was about 1.5 times lower.

While after a SO2 molecule is strongly adsorbed over pore16 as a partially closed gate, a mixture of smaller molecules like H2/CH4 can be separated successfully, with a selectivity of about 8100 1.

A maximum STY selectivity of about 72% was achieved in a two-step catalytic run: the first step was carried out at 323 K and 20 bar and the second step at 353 K and 1 bar.

When the methanation temperature rises to 280 °C, methane selectivity reaches about 98%%, while the CH4 yield is about 62%%, suggesting that the catalyst prepared in this way gave a high CH4 selectivity, although its activity for CO2 conversion is lower than that for CO hydrogenation.

Micropore diffusivities derived from the second moments of the chromotographic response peaks are in reasonable agreement with the values derived from the uptake curves [ Dc/rc2 O2 ≈ 3.7 × 10−3 s−1; (Dc/rc2)N2 ≈ 1.2 × 10−4 s−1 at 303 K], indicating a kinetic selectivity (DO2/DN2) of about 30.