Study on explosion suppression and gas ablation of CuO-CeO2/CaO composite powders with catalytic adsorption
ZHANG Leilin
REN Ke
YU Yong
Abstract：Coal mine gas explosion accident will not only produce a huge shock wave,but also produce a large number of toxic and harm-ful gas CO,which seriously affects the mine safety production environment.In order to achieve the dual protection of explosion suppres-sion and gas ablation,CuO-CeO2 composite oxide was used as CO catalyst and CaO was used as CO2 adsorbent.The catalytic adsorption composite powder CuO-CeO2/CaO doped with CaO was prepared by the combination of solid phase impregnation and thermal dispersion.The effects of H2O and CaO doping amount on the catalytic adsorption performance were investigated by heating and isothermal gas reac-tion experiments.The physical and chemical structures of CuO-CeO2/CaO were characterized by X-ray diffractometer,X-ray photoelec-tron spectrometer,Raman spectrometer and scanning electron microscope.The explosion suppression and gas ablation properties of differ-ent powders were analyzed by 20 L spherical explosion tester and gas chromatograph.The results show that the doping of CaO reduces the negative effects of H2O and CO2 on CuO-CeO2/CaO,promotes the formation of surface oxygen vacancies and the interaction between Cu-Ce,and then improves the CO catalytic performance,so that it can completely oxidize CO at about 120℃.When the doping amount of CaO is 15%,its CO catalytic performance and CO2 adsorption are the highest.Compared with equal mass Al2O3 and CuO-CeO2 powders,CuO-CeO2/CaO composite powders have stronger explosion suppression and gas ablation ability.The specific performance is that after adding CuO-CeO2/CaO,the maximum explosion pressure,maximum pressure rise rate and deflagration index of gas explosion reach the lowest,which are 0.483 MPa,7.60 MPa/s and 2.1 MPa·m/s,respectively,and the elimination rates of CO and CO2 reach the highest,which are 89.1%and 95.3%,respectively.The study confirmed that the composite powder CuO-CeO2/CaO can eliminate CO and CO2 by its catalytic adsorption,and reduce the gas explosion pressure by interrupting the chain reaction,dilution asphyxiation and endo-thermic effect of adsorption products,which provides a new idea for reducing the risk of gas explosion.
Keywords：gas explosionexplosion suppressiongas ablationcomposite powdercatalytic adsorption
Publication Date：2025-12-31
Online Publishing Date：2026-01-16(First online date of this platform, not the publication date of the document)
Pages：13( 122-134 )