Citation: TANG Xiao-dong, LU Hai, LI Jing-jing, ZHOU Miao, HU Na. Preparation and evaluation of activated carbon-based desulfurization adsorbent by one-step method at low temperature[J]. Journal of Fuel Chemistry and Technology, ;2018, 46(5): 633-640. shu

Preparation and evaluation of activated carbon-based desulfurization adsorbent by one-step method at low temperature

TANG Xiao-dong ^1,2,, ,
LU Hai ^1,2 ,
LI Jing-jing ² ,
ZHOU Miao ² ,
HU Na ²

1.
State Key Laboratory of Oil and Gas Reservoir Geology and Development Engineering, Southwest Petroleum University, Chengdu 610500, China
2.
College of Chemistry and Chemical Engineering, Southwest Petroleum University, Chengdu 610500, China

Corresponding author: TANG Xiao-dong, txd3079@163.com
Received Date: 21 December 2017
Revised Date: 20 March 2018

Figures(12)

Activated carbon was prepared by one-step method at low temperature using sawdust as material. Effect of preparation and adsorption conditions among liquid-solid and gas-solid on desulfurization performance was discussed. The results show that the optimum preparation conditions are as follows:mass ratio of 1:1 for impregnation liquid (with HNO₃ mass fraction of 30%) and sawdust, NiO loading of 5% on surface of adsorbent, impregnation time of 24 h under room temperature and calcination time of 3 h under 400℃. Under adsorbent mass/DBT volume of 0.2 g/10 mL, liquid-solid adsorption temperature of 40℃ and adsorption time of 5 h, desulfurization efficiency can reach 28.36%. After continuous adsorption 4 times saturated adsorption sulfur capacity is up to 2.34 mgS/g. Under gas-solid adsorption temperature of 250℃ and adsorption velocity of 6.3 h^-1, adsorption sulfur capacity can reach 2.37 mgS/g. The effect of high temperature gas-solid adsorption desulfurization on adsorbent indicates that BET specific surface area, total pore volume and micropore volume of adsorbent have been improved obviously, which show that the gas-solid adsorption desulfurization process has realized the reaming activation of activated carbon simultaneously. The regeneration experiment of toluene solvent shows that the regeneration performance can reach more than 90% after 5 times cycle.
- adsorbent,
- preparation,
- dibenzothiophene,
- adsorption,
- desulfurization
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