Effect of Preparation Conditions on the Property Cu/AC Adsorbents for Phosphine Adsorption

Abstract

Copper-based activated carbon adsorbents (Cu/AC) were prepared and used to investigate the effects of various copper precursors, impregnation solution concentration, and calcination temperature on phosphine (PH 3 ) adsorption removal from yellow phosphorus tail gas. N 2 adsorption isotherm and X-ray Diffraction (XRD) were used for characterizing the Cu/AC adsorbents. It can be seen that the Cu(N)/AC adsorbent prepared from the Cu(NO 3 ) 2 precursor has higher PH 3 breakthrough adsorption capacity than other three adsorbent because the surface copper status of it is mainly CuO. Fresh activated carbon requires an optimal impregnation solution concentration (0.05 mol/L) to reach this optimal PH 3 breakthrough adsorption capacity (78.62 mg/g). The result shows that the surface chemical characteristics (Cu content) of activated carbon is more important than the physical ones (specific surface or pore volume) for the PH 3 adsorption performance. When the calcination temperature is 350 C, the Cu(N)/AC adsorbent has the biggest PH 3 breakthrough adsorbed amount of 112.38 mg/g. The present study confirmed that the Cu/AC adsorbents would be one of the candidates for PH 3 adsorption removal from yellow phosphorus tail gas.

Preparation and Phosphine Adsorption of Activated Carbon Prepared from Walnut Shells by KOH Chemical Activation

“…The result shows that the MWSAC adsorbent owns the biggest PH 3 breakthrough adsorption capacity and is one of the candidates for PH 3 adsorption removal from yellow phosphorus tail gas. Table 5 (2,4,7,19,22,24,(35)(36)(37) shows that some of the promising experimental performances were obtained with different composite adsorbents. In order to improve PH 3 adsorption capacity, most of the adsorbents are modified by copper (Cu).…”

“…According to the previous study (21,22), PH 3 adsorption capacity of fresh ACs is rather low. To enhance the PH 3 adsorption capacity, modification of AC using copper oxides has been reported (2,19,(22)(23)(24).…”

“…To enhance the PH 3 adsorption capacity, modification of AC using copper oxides has been reported (2,19,(22)(23)(24). Moreover, addition of zinc and lanthanum onto copper-based activated carbon increased degree of dispersion and the stability of CuO (7,25).…”

Adsorption of Trace Phosphine in Circular Hydrogen of a Polysilicon Chemical Vapor Deposition Stove by Cu/γ-Al2O3

“…The raw materials frequently used for adsorbent support are active carbon and molecular sieve because of their special characteristics with high specific surface areas and pore volumes, which are beneficial for both physical and chemical adsorption. Ning and co-workers − used active carbon and zeolites as supports for removal of phosphine in yellow phosphorus tail gas. Li et al also did some research about the adsorptive behaviors of phosphine on Y zeolite and ZSM-5 recently.…”

Determination of Fluorine in the Atmosphere Surrounded the Yellow Phosphorous Enterprise Using Ion Chromatography

“…When 1t of yellow phosphorus is produced, the off-gas emission is about 3500 Nm 3 , causing serious pollution of the surrounding atmospheric environment. Phosphorus exhaust contains large amount of phosphorus, sulfur, fluorine, arsenic and other impurities [1][2][3][4][5][6][7][8] . Among them, HF and SiF 4 is considered to be of high toxicity, and direct damage can be caused to various organs in human body as people in the exposure to the off-gas.…”