The result shows that the rare earth oxide mixture composing of CeO_2 and La_2O_3, as the catalyst for the reduction of SO_2 by CO, can remove SO_2 mostly without O_2.In the presence of O_2 the result shows that the catalyst will be poisoned by oxygen and SO_2 conversion drops almostly to 0. This kind of poisone influnce is reversible partly.
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.
After crosslinking the PAA shell and removing the PCL core, "nanocages" made of PAA network were obtained.
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.
Denitrifying phosphorus removing bacteria were very hungry when the internal PHB was consumed.
The coagulation efficiency and dynamic experimental results showed that Nano-Al13 with high positive-charged species was effective in removing turbidity and color.
In ambient air, the Li-Ti-O compound adsorbs water easily, and the chemically adsorbed water is difficult to remove below 400°C.
According to the introduction of new diffusion term, this model can not only remove noise but also enhance edges and keep their locality.
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.
The curve fitting methods are applied for each curve segment to remove the unwanted points with pre-determined tolerance.
Progress has been made in the past decade on phytoremediation, a safe and inexpensive approach to remove contaminants from soil and water using plants.
The removal of two outliers led to statistically significant models.
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.
Consequently, the catalytic activity in the removal of THC and NOx is significantly improved.
The concentration of formic acid, activated carbon dosage, initial concentration of hydrogen peroxide and reaction temperature affect the oxidative removal of DBT.