Six tower VPSA unit was used for removing CO,CO2 ,C2H4 ,C2H6 ,C3H6 ,C3H8 ,N2 ,CH4 and O2 from feedstock. The used sorbent was regenerated under vacuum.
It is found that NO/N2 gas discharge plasma remove NO is achieved mainly through a series of fast elementary reactions including N+NO→N2+O, e+N2(A3∑+) →2N+e and e+N2→N2(A3∑u+)+e, and that the active atom of N is the base for NO removal.
For the purpose of recoverying C_((3)~+), the light hydrocarbon recoverying installation is equipped with deethanizer to remove the C_1 and C_2 from liquid hydrocarbons.
In this experiment foam flotation is used to remove Cr 3+ from the wastewater, sodium dodecyl sulfate ( SDS ) as surfactant, and Fe(OH) 3 as flocculant, and operating parameters adaptable to batch operation are obtained: pH value of solution about 5.5, SDS 180 mg/L, and gas flowrate 800 mL/min.
The results show that fluoride-bearing acids are the efficēnt agents for cleaning coal,where HF acid can effectively remove the SiO_2,Al_2O_3,Fe_2O_3 components in minerals,and H_2SiF_6 acid can effec- tively remove the Al_2O_3,Fe_2O_3,CaO,MgO components in minerals,espe- cially for CaO,MgO.
The effect of the pH value of the solution, treatment temperature and the molar ratio of calcium ions to phosphite ions on the removal efficiency of phosphite was investigated.
In search for the characteristics of natural reproduction and establishment of the mosses, 10 quadrates (10×10 cm for each) were obtained by removing the moss crusts in different positions of fixed dunes.
In this method, the pre-dispersed nano-particle suspensions are blended with melting polymers in a weak shearing field using an extruder, followed by removing the water from the vent.
The coagulation efficiency and dynamic experimental results showed that Nano-Al13 with high positive-charged species was effective in removing turbidity and color.
The regeneration of exhausted solutions of electroless nickel plating wood veneer was realized using soluble calcium salt to precipitate and remove phosphite and then using fluoride to remove residual calcium ions from the solution.
Progress has been made in the past decade on phytoremediation, a safe and inexpensive approach to remove contaminants from soil and water using plants.
As a result of long-term removal of animal grazing, crust kept intact in year-round exclusion community, which was a main reason of community xerophytization.
The catalytic activity of the catalysts in removal of NOx, total hydrocarbon (THC) and particulate matter (PM) from diesel exhaust gases were examined in detail using temperature-programmed reaction technique.
The concentration of formic acid, activated carbon dosage, initial concentration of hydrogen peroxide and reaction temperature affect the oxidative removal of DBT.