Thermodynamic and Process Analyses of Syngas Production Using Chemical Looping Reforming Assisted by Flexible Dicalcium Ferrite-Based Oxygen Carrier Regeneration,Energy & Fuels

当前位置： X-MOL 学术 › Energy Fuels › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Thermodynamic and Process Analyses of Syngas Production Using Chemical Looping Reforming Assisted by Flexible Dicalcium Ferrite-Based Oxygen Carrier Regeneration
Energy & Fuels ( IF 5.2 ) Pub Date : 2020-04-15 , DOI: 10.1021/acs.energyfuels.0c00479
Vedant Shah ₁ , Pinak Mohapatra ₁ , Liang-Shih Fan ₁

Affiliation

Syngas production is highly critical to the manufacturing of many value-added products, and its economic prospects can be increased through the enhancement of fuel conversion and the syngas yield. This study explores the thermodynamic characteristics of syngas production through chemical looping reforming (CLR) of natural gas using dicalcium ferrite (Ca₂Fe₂O₅) as the oxygen carrier in a cocurrent moving-bed reactor. The effects of temperature, pressure, and steam addition are studied for both isothermal and adiabatic conditions. A natural gas conversion of 99.78% and a yield of 2.86 mol of syngas/mol of natural gas are obtained for CLR as compared to 95.97% and 2.70, respectively, for autothermal reforming (ATR). A fluidized bed and a countercurrent moving bed are employed for the regeneration of reduced solids using air and a steam/CO₂ mixture, respectively, thereby achieving operational flexibility. The syngas yield increases by ∼41% using the steam/CO₂ mixture, whereas a high-purity H₂ is obtained from the oxidation of reduced solids in pure steam. The process analyses indicate an increase in the effective thermal efficiency from 86.4% to 92.2% and the exergy efficiency from 79.5% to 85.3% on using the Ca₂Fe₂O₅-based CLR over ATR, rendering the syngas production using CLR economically attractive.

中文翻译：

柔性双钙铁氧体基氧气载体再生辅助化学循环重整制合成气的热力学和过程分析

合成气的生产对于许多增值产品的生产至关重要，并且其经济前景可以通过提高燃料转化率和合成气产量来提高。本研究探讨了使用铁酸二钙（Ca ₂ Fe ₂ O ₅）通过天然气的化学循环重整（CLR）来生产合成气的热力学特征。）作为并流移动床反应器中的氧气载体。研究了等温和绝热条件下温度，压力和蒸汽添加的影响。CLR的天然气转化率为99.78％，合成气/摩尔天然气的产率为2.86 mol，而自热重整（ATR）的产率分别为95.97％和2.70。使用流化床和逆流移动床分别使用空气和蒸汽/ CO ₂混合物再生还原的固体，从而获得操作灵活性。使用蒸汽/ CO ₂混合物，合成气收率提高约41％，而高纯度H ₂通过在纯蒸汽中氧化还原性固体而获得。过程分析表明，与使用ATR相比，使用基于Ca ₂ Fe ₂ O ₅的CLR的有效热效率从86.4％增至92.2％，（火用）效率从79.5％增至85.3％，这使得使用CLR生产合成气在经济上具有吸引力。

更新日期：2020-04-15

点击分享查看原文

点击收藏

阅读更多本刊新发论文本刊介绍/投稿指南