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Water Gas Shift Reaction and Effect of Gasification Reaction in Packed-bed under Heating-up Condition

机译：加热条件下填充床中水煤气变换反应及气化反应的影响

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For the decrease of CO_2 emission from ironmaking field, it is important to clarify the behaviors of hydrogen in blast furnace (BF). However, when hydrogen content increased in BF, many reactions related to hydrogen occurred, and many complicated relationships among the reactions are generated. Especially, the behavior of water gas shift reaction (WGSR) is not understood correctly and the effects on the gasification reaction and the reduction reaction are not known at all. In the present study, the interest was focused on the relationship between WGSR and coke gasification reaction. The WGSR was examined experimentally and kinetic analysis was performed with and without gasification reaction. The quantification of reaction rates was carried out by gas analysis method. Several kind of crucibles were developed for determining the respective reaction rates occurring in different position. The rate equation of invers WGSR was decided as R_(sh-i)=-dCO_2/dt=+dH_2O/dt=r_(H2O){mol/s·cm~3-bed}=AK_(sh-i)(C_(co2)C_(H2)-C(co2)~eC_(H2)~e) where the rate constant in the alumina crucible was obtained as k_(sh-i)~′{cm~3-bed/s·mol}=107×10~(+9)exp{-117 430/RT} The single WGSR in alumina crucible is in an equilibrium state over 1 573 K. Calculation of gasification reaction (K_B, Boudouard reaction) in Zone 1 and Zone 1 +2+3 were in excellent agreement with the observation under CO-CO_2 system (without Hydrogen). When H_2 was added to the reaction gases, Water gas reaction Ⅰ (Kwi) and Ⅱ (K_(W2)) in addition to K_B were calculated separately and the total gasification reaction RCS_(cal) (=K_b+K_(w1)+K_(w2)) was in good agreement with the observation. The relationship between the separated gasification reactions (K_B, K_(w1) and K_(w2)) and WGSR was discussed.
机译：为了减少炼铁场的CO_2排放，弄清高炉中氢的行为很重要。然而，当BF中的氢含量增加时，发生许多与氢有关的反应，并且在反应之间产生许多复杂的关系。尤其是，对水煤气变换反应（WGSR）的行为的认识不正确，对气化反应和还原反应的影响也完全不清楚。在本研究中，兴趣集中在WGSR和焦化气化反应之间的关系。通过实验检查了WGSR，并在有或没有气化反应的情况下进行了动力学分析。反应速率的定量通过气体分析方法进行。开发了几种坩埚，用于确定在不同位置发生的相应反应速率。反相WGSR的速率方程确定为R_（sh-i）=-dCO_2 / dt = + dH_2O / dt = r_（H2O）{mol / s·cm〜3床} = AK_（sh-i）（C_获得氧化铝坩埚中的速率常数为（k_（sh-i）〜'{cm〜3-bed / s·mol}的（co2）C_（H2）-C（co2）〜eC_（H2）〜e） = 107×10〜（+9）exp {-117 430 / RT}氧化铝坩埚中的单个WGSR在1 573 K上处于平衡状态。计算1区和1区中的气化反应（K_B，Boudouard反应） 2 + 3与在CO-CO_2系统（无氢）下的观察结果非常吻合。向反应气体中加入H_2时，除计算K_B以外，还分别计算水煤气反应Ⅰ（Kwi）和Ⅱ（K_（W2）），总气化反应RCS_（cal）（= K_b + K_（w1）+ K_ （w2））与观察结果非常吻合。讨论了分离的气化反应（K_B，K_（w1）和K_（w2））与WGSR之间的关系。

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