【摘 要】
：
We prepared a kind of metal oxide-modified walnut-shell activated carbon (MWAC) by KOH chemical activation method and used for PH3 adsorption removal. Meanwhile, the PH3 adsorption equilibrium was investigated experimentally and fitted by the Toth equatio
【机 构】
：
Solar Energy Research Institute, Yunnan Normal University, Kunming 650500, China;Faculty of Environm
【出 处】
：
武汉理工大学学报（材料科学版）（英文版）
论文部分内容阅读
We prepared a kind of metal oxide-modified walnut-shell activated carbon (MWAC) by KOH chemical activation method and used for PH3 adsorption removal. Meanwhile, the PH3 adsorption equilibrium was investigated experimentally and fitted by the Toth equation, and the isosteric heat of PH3 adsorption was calculated by the Clausius-Clapeyron Equation. The exhausted MWAC was regenerated by water washing and air drying. Moreover, the properties of five different samples were characterized by N2 adsorption isotherm, SEM/EDS, XPS, and FTIR. The results showed that the maximum PH3 equilibrium adsorption capacity was 595.56 mg/g. The MWAC had an energetically heterogeneous surface due to values of isosteric heat of adsorption ranging from 43 to 90 kJ/mol. The regeneration method provided an effective way for both adsorption species recycling and exhausted carbon regeneration. The high removal efficiency and big equilibrium adsorption capacity for PH3 adsorption on the MWAC were related to its large surface area and high oxidation activity in PH3 adsorption-oxidation to H3PO4 and P2O5. Furthermore, a possible PH3 adsorption mechanism was proposed.
其他文献
The arc erosion under medium direct currents in the argon flow was tested on tungsten-copper (W-Cu) contacts which were processed by hot extrusion and heat treatment. The scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were u
A multifunctional amine,1,4-bis(2,4-diaminophenoxy)benzene(14BDAPOB),was prepared and used as a novel hardener for novolac epoxy resin(ER).The structure of 14BDAPOB was characterized with Fourier transform infrared(FT-IR)spectroscopy and differential scan
Drying shrinkage of thermal insulation mortar with glazed hollow beads was measured by a vertical length comparator, and the influences of fly ash with different contents (0, 18%, 36%, and 54%were used) on the long-term drying shrinkage were discussed. Th
According to the results of accelerated tests of acidiifcation corrosion depth and compressive strength of concretes subjected to sulfuric acid environments, the acidiifcation depth laws of concretes were predicted based on the grey system theory. Thus, t
Nylon 10T and nylon 10T/1010 samples were synthesized by direct melt polymerization.The isothermal crystallization kinetics of nylon 10T and nylon 10T/1010 was investigated by means of differential scanning calorimetry(DSC).The crystallization kinetics un
Carbon nanotubes (CNTs) were deposited uniformly on carbon cloth by electrophoretic deposition (EPD). Thereafter, CNT-doped clothes were stacked and densified by pyrocarbon via chemical vapor infiltration to fabricate two-dimensional (2D) carbon/carbon (C
To improve the mechanical properties of alumina particulates reinforced steel matrix composite, Ti powder was added into the alumina preform, a 5140 steel matrix composite was fabricated by squeeze casting, and the influences of Ti powder on the microstru
Aiming at the problem of available water conservation in desertification ecological restoration, we prepared the water retention materials with montmorillonite(MMT) modified by Castor Oil Polyoxyethylene Ether(10) (EL-10) emulsifying vegetable waxes. The