How I use power factor capistor for 22kw motor

You should find this helpful:

Power Factor for a Three-Phase Electrical Motor

Practical power factor correction : POWER FACTOR

You should do an economic study based on pf at full load and saving if corrected to, say,0.9 or 0.95.

Compare the cost of installing a capacitor with savings in electricity bill(kVA and kwh)if corrected to a certain pf