Numerical Investigation of Carbon Deposition Behavior in Ni/Al2O3-Based Catalyst Porous-Filled Solar Thermochemical Reactor for the Dry Reforming of Methane Process,Industrial & Engineering Chemistry Research

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Numerical Investigation of Carbon Deposition Behavior in Ni/Al2O3-Based Catalyst Porous-Filled Solar Thermochemical Reactor for the Dry Reforming of Methane Process
Industrial & Engineering Chemistry Research ( IF 3.8 ) Pub Date : 2019-08-15 , DOI: 10.1021/acs.iecr.9b02486
Hao Zhang , Yong Shuai , Songjian Pang , Ruming Pan , Bachirou Guene Lougou , Xing Huang ₁

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Due to the utilization of concentrated solar energy, a more complex high-temperature thermal environment will be formed inside the solar thermochemical reactor, thereby resulting in complicated behaviors of chemical reactions. This paper numerically investigates the carbon deposition behaviors inside a Ni/Al₂O₃-based catalyst porous-filled solar thermochemical reactor for the dry reforming of methane (DRM) process under various operational conditions. The reaction kinetics for DRM including four side reactions are programmed via UDFs. The simulation results indicate that the optimal structural parameters of porous media for high-value syngas products with less carbon deposition are ϕ = 0.8 and d_p = 2 mm, while the optimal feed ratio is CH₄/CO₂ = 1. Besides, the operating condition at v_in = 100 mL/min and P_lamp = 0.7 kW has the advantage of obtaining higher conversion rate while reducing the carbon deposition rate to some extent.

中文翻译：

甲烷干重整制Ni / Al2O3基催化剂多孔太阳能热化学反应器中碳沉积行为的数值研究

由于利用集中的太阳能，将在太阳能热化学反应器内部形成更复杂的高温热环境，从而导致化学反应的行为复杂。本文数值研究了Ni / Al ₂ O ₃基催化剂多孔填充太阳能热化学反应器内的碳沉积行为，该反应器用于在各种操作条件下对甲烷（DRM）进行干重整。DRM的反应动力学包括四个副反应可通过UDF进行编程。模拟结果表明，对于碳沉积较少的高价值合成气产品，多孔介质的最佳结构参数为ϕ = 0.8和d _p = 2 mm，而最佳进料比为CH₄ / CO ₂ = 1。此外，在v _in = 100 mL / min和P _lamp = 0.7 kW时的操作条件具有获得较高转化率的优点，同时在一定程度上降低了碳沉积速率。

更新日期：2019-08-15

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