Lu, C
1991
Rotary Kiln Incineration: Comparison and Scaling of Field-Scale Contaminant Evolution Rates from Sorbent Beds
Lester, T.W.; Cundy, V.A.; Sterling, A.M.; Montestruc, A.N.; Jakway, A.J.; Lu, C.; Leger, C.B.; Pershing D.W.; Lighty, J.S.; Silcox, G.D. and Owens, W.D.
Environmental Science Technology, 25:1142-1152, 1991. Funded by Environmental Protection Agency, Louisiana State University/Hazardous Waste Research Center and ACERC.
A comparison is made, for the first time, between the evolution of hydrocarbons from clay sorbent beds in a field-scale rotary kiln incinerator and in a pilot-scale rotary kiln simulator. To relate the data from the different sized units, due allowance is made for bed dynamical similitude, bed geometrical factors, and bed heat-up. To minimize the effects of disturbances caused by foreign matter in the field scale bed and differences in loading techniques, the rate of evolution is characterized by an "evolution interval" defined as the time required for the middle 80% of the ultimate containment evolution to occur. A comparison of evolution intervals with reciprocal bed temperature reveals that the data are consistent with an analysis that assumes a uniform bed temperature (at any instant of time) and desorption controlled evolution rate. Furthermore, the evolution intervals scale inversely with a modified Froude Number, which characterizes bed dynamics. The success in comparing field and simulator results indicates that pilot scale rotary kilns may be used to simulate certain features of industrial-scale units if dynamical, geometrical and thermal parameters are matched appropriately.
1989
Chain Branching Flames Under Conditions of Partial Equilibrium
Fife, P.; Hastings, S. and Lu, C.
Accepted for publication in SIAM J. Appl. Math., 1989. Funded by National Science Foundation.
A full analysis is given for planar steady flames under the following model chemistry:
A + B —> 2B
2B —> Products
The analysis is asymptotic, based on large activation energy of the first reaction, and the smallness of a certain other parameter. This is followed by a mathematically rigorous analysis justifying the asymptotics. Of especial interest is the regime where the first reversible reaction is in partial equilibrium. Parameter values leading to that regime are delineated. The forward first reaction can be either exothermic or endothermic.
Lu, C
1991
Rotary Kiln Incineration: Comparison and Scaling of Field-Scale Contaminant Evolution Rates from Sorbent Beds
Lester, T.W.; Cundy, V.A.; Sterling, A.M.; Montestruc, A.N.; Jakway, A.J.; Lu, C.; Leger, C.B.; Pershing D.W.; Lighty, J.S.; Silcox, G.D. and Owens, W.D.
Environmental Science Technology, 25:1142-1152, 1991. Funded by Environmental Protection Agency, Louisiana State University/Hazardous Waste Research Center and ACERC.
A comparison is made, for the first time, between the evolution of hydrocarbons from clay sorbent beds in a field-scale rotary kiln incinerator and in a pilot-scale rotary kiln simulator. To relate the data from the different sized units, due allowance is made for bed dynamical similitude, bed geometrical factors, and bed heat-up. To minimize the effects of disturbances caused by foreign matter in the field scale bed and differences in loading techniques, the rate of evolution is characterized by an "evolution interval" defined as the time required for the middle 80% of the ultimate containment evolution to occur. A comparison of evolution intervals with reciprocal bed temperature reveals that the data are consistent with an analysis that assumes a uniform bed temperature (at any instant of time) and desorption controlled evolution rate. Furthermore, the evolution intervals scale inversely with a modified Froude Number, which characterizes bed dynamics. The success in comparing field and simulator results indicates that pilot scale rotary kilns may be used to simulate certain features of industrial-scale units if dynamical, geometrical and thermal parameters are matched appropriately.
1989
Chain Branching Flames Under Conditions of Partial Equilibrium
Fife, P.; Hastings, S. and Lu, C.
Accepted for publication in SIAM J. Appl. Math., 1989. Funded by National Science Foundation.
A full analysis is given for planar steady flames under the following model chemistry:
A + B —> 2B
2B —> Products
The analysis is asymptotic, based on large activation energy of the first reaction, and the smallness of a certain other parameter. This is followed by a mathematically rigorous analysis justifying the asymptotics. Of especial interest is the regime where the first reversible reaction is in partial equilibrium. Parameter values leading to that regime are delineated. The forward first reaction can be either exothermic or endothermic.