The optimization suggests that, in the present design, the yield cannot be improved significantly beyond 90%, but that almost complete conversion could be achieved when the reactor profile of hydrogen pressure is optimized.
Negative pressure is optimized to prevent air bubble entrapment in the chamber of the printing head and was fixed at −5 kPa for all printing liquids.
After a screening of six different polysaccharide based chiral stationary phases and four co-solvents, the percentage of co-solvent, the flow-rate and the outlet pressure were optimized through a design of experiments (DoE).
Parameters of the inkjet printing system such as voltage applied to the piezoelectric transducer and the meniscus pressure were optimized towards a stable ejection of a ball-shaped droplet of the colloidal suspensions with a jetting frequency of up to 5 kHz.
For the CO2 system, when the system was in transcritical cycle due to higher ambient air temperature, the head pressure was optimized through extensive thermodynamic cycle analysis as a function of ambient air temperature.
In Rankine cycle, the turbine inlet pressure was optimized to maximize the thermal efficiency.
The conditions for each printing liquid, such as the magnitudes of positive and negative pressures, the push time for deflecting the membrane downward by positive pressure, and the pull time for deflecting the membrane upward by negative pressure, were optimized to operate the printing head.
The CO2 absorption at atmospheric pressure was optimized by varying the TEPA-loading level (0 40% (w/w)), operating temperature (40 80 °C) and water vapor concentration (0 16% (v/v)) in a 10% (v/v) CO2 feed stream in helium balance using a full 23 factorial design.
The reaction conditions including temperature and hydrogen pressure were optimized.
The operating conditions including the hollow cathode dimension, applied pulsed voltage and argon pressure, were optimized.
