Moving Bed Gasification of Low Rank Alaska Coal

Table 1

Rate expression for reactions occurring in char combustion gasification section [10].

Reaction	Rate expression
(1)	𝑅1=𝑃O21/𝑘film+1/𝑘ash
	𝑘film=0.292∗4.26∗[𝑇/1800]𝑑𝑝∗𝑇^1.75
	𝑘ash=𝑘film∗𝑌∗𝜀1−𝑌^𝑝2.5
(2)	𝑅2=𝑘2∗exp−𝐸2/𝑅𝑇(𝑃H2O−𝑃H2O^∗)[C]
	𝑃H2O^∗=𝑃H2∗𝑃COexp(17.29−16330/𝑇)
(3)	𝑅3=𝑘3∗exp−𝐸3/𝑅𝑇∗[C]∗(𝑃CO2−𝑃CO2^∗)
	𝑃CO2^∗=𝑃CO2/exp(20.92−20280/𝑇)
(4)	𝑅4=exp(−7.087−8078/𝑇)∗(𝑃H2−𝑃H2^∗)[C]
	𝑃H2^∗=𝑃CH4/exp(−13.43+10100/𝑇)^0.5
(5)	𝑅5=𝑏∗2.877∗10^5∗exp(−27760/𝑅𝑇)
	∗𝑋CO𝑋H2O−𝑋CO2𝑋H2𝑘wgs𝑋ash∗𝜌c
	∗𝑃^(0.5−𝑃/250)∗1−𝜀bed∗exp(−8.91+5553/𝑇)
	𝑘wgs=exp(−3.6890+7234/1.8𝑇)
(6)	𝑅6=3∗10^10∗exp(−16000/𝑅𝑇)∗
	𝑇∗𝑃O2/82.06^0.3∗𝑇∗𝑃H2/82.06^0.5∗𝜀bed