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Impact of post-flame processes on the hydrogen yield in partial oxidation of methane in the matrix reformer
Chemical Engineering Research and Design ( IF 3.7 ) Pub Date : 2021-09-10 , DOI: 10.1016/j.cherd.2021.09.009
V.I. Savchenko 1 , A.V. Nikitin 1, 2 , Y.S. Zimin 1, 2 , A.V. Ozerskii 1, 2 , I.V. Sedov 1 , V.S. Arutyunov 1, 2
Affiliation  

Non-catalytic partial oxidation of methane in matrix reformers offers the possibility of producing hydrogen directly at sites of its consumption, in particular from local bioresources and non-traditional fossil hydrocarbons. The kinetics simulation of the process shows that it proceeds in two stages. In the flame zone, in the presence of oxygen, along with CO, H2, CO2 and H2O, methane pyrolysis products are formed. Then, in the post-flame zone, in the absence of oxygen, at 1400–1600 K the slow pyrolysis and steam conversion of the products occur. Kinetic analysis shows that the pyrolysis of methane into acetylene and the subsequent steam reforming of the latter proceeds much faster than the direct interaction of methane with H2O, which leads to decreasing methane and acetylene concertation and increasing H2 and CO concentration. It is necessary to optimize conditions in the prost-flame zone to increase hydrogen yield and decrease acetylene yield.



中文翻译:

后火焰过程对基体重整器中甲烷部分氧化氢产率的影响

甲烷在基质重整器中的非催化部分氧化提供了在其消耗地点直接生产氢气的可能性,特别是从当地生物资源和非传统化石碳氢化合物。该过程的动力学模拟表明它分两个阶段进行。在火焰区,在氧气存在的情况下,与CO、H 2、CO 2和H 2 O 一起形成甲烷热解产物。然后,在后火焰区,在没有氧气的情况下,在 1400-1600 K 下,产物发生缓慢的热解和蒸汽转化。动力学分析表明,甲烷热解为乙炔和随后乙炔的蒸汽重整比甲烷与 H 2的直接相互作用进行得快得多O,这会导致甲烷和乙炔协同作用降低并增加 H 2和 CO 浓度。需要优化前焰区的条件,提高氢气产率,降低乙炔产率。

更新日期:2021-09-24
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