Catalysis and degradation of phenol in coking wastewater during low-rank coal coke gasification,Reaction Chemistry & Engineering

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Catalysis and degradation of phenol in coking wastewater during low-rank coal coke gasification
Reaction Chemistry & Engineering ( IF 3.4 ) Pub Date : 2020-11-17 , DOI: 10.1039/d0re00394h
Yang Geng _{1,

2,

3,

4} , Jinfeng Bai _{1,

2,

3,

4} , Yang Liu _{1,

2,

3,

4} , Xiangyun Zhong _{1,

2,

3,

4} , Chao Li _{1,

2,

3,

4} , Yang Liu _{1,

2,

3,

4} , Zhihua Zhang _{1,

2,

3,

4} , Yaru Zhang _{1,

2,

3,

4}

Affiliation

The thermochemical-reaction characteristics of different concentrations of phenol water and gasification-coke at 1000 °C in a thermochemical reactor were experimentally studied. The effect of phenol water on the thermochemical-reaction products and gasification-coke thermochemical reactivity, and the evolution of carbon crystalline structures of gasification-coke during the reaction were analyzed. Experimental results show that compared with pure water, when 1000 and 2000 mg L⁻¹ of phenol water reacted with gasification-coke, the yield of syngas increased by 2.2% and 4.9%, and the heating value increased by 1.4% and 5.8%, respectively. The degradation rates of the phenol and COD_Cr in the condensate could reach 96% and 92%, respectively. Gasification-coke pore walls became thinner or even damaged, and the carbon skeleton structure was eroded after the thermochemical reaction with phenol water. An increasing phenol water concentration was favorable for the thermochemical-reaction activity of gasification-coke, and the carbon conversion increase resulted in a more ordered carbon crystalline structure of gasification-coke. A comparison between pure water and phenol water revealed that the evolution of d₀₀₂ and L_c was approximately the same, with the major difference being in the evolution of L_a during the thermochemical reaction.

中文翻译：

低阶煤焦气化过程中焦化废水中苯酚的催化降解

实验研究了不同浓度的苯酚水和气化焦在1000℃下在热化学反应器中的热化学反应特性。分析了苯酚水对热化学反应产物和气化焦炭热化学反应的影响，以及反应过程中气化焦炭碳晶体结构的演变。实验结果表明，与纯水相比，当1000和2000 mg L ^-1的苯酚水与气化焦炭反应时，合成气的产率分别提高了2.2％和4.9％，发热量分别提高了1.4％和5.8％，分别。苯酚和COD _Cr的降解率凝结水中的水分别达到96％和92％。与苯酚水发生热化学反应后，气化焦炭的孔壁变薄甚至损坏，碳骨架结构被腐蚀。苯酚水浓度的增加有利于气化焦炭的热化学反应活性，碳转化率的增加导致气化焦炭的碳晶体结构更加有序。通过比较纯水和苯酚水，可以看出d ₀₀₂和L _c的变化大致相同，主要区别在于在热化学反应过程中L _a的变化。

更新日期：2020-11-25

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