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CaCO3 and air/steam effect on the gasification and biohydrogen performance of corn cob as received: Application in the Colombian Caribbean region
Biomass & Bioenergy ( IF 5.8 ) Pub Date : 2021-08-14 , DOI: 10.1016/j.biombioe.2021.106207
Rafael D. Gómez-Vásquez 1 , Erika Arenas Castiblanco 2 , Zulamita Zapata Benabithe 2 , Antonio José Bula Silvera 3 , Diego A. Camargo-Trillos 1
Affiliation  

Corncob is one of the most abundant agro-industrial wastes globally. It represents a bioenergy feedstock of 1500–5500 million tons per year. The shape and size of the corncob are suitable for gasification without pretreatment (size reduction, densification, or drying) in a downdraft gasifier. However, its volatile content (about 80% DAF) can generate high tar content, representing a challenge to adopt this technology. In the present work, an evaluation of the effect of air-steam mixture and calcium carbonate CaCO3 as a promoter of both reforming and gasification reaction was carried out using corn cob without grains as raw material in a 40 kW gasifier. An analysis of variance of four experimental treatments was used to determine the main statistical and interactive effects on the syngas composition, hydrogen yield (yH2), syngas lower heating value (LHVgas), and cold gas efficiency (CGE). Results reveal the highest gasification performance achieved hydrogen production yields of 310 Nml/g, an LHVgas value of 4.8 MJ/Nm3, and cold gas efficiency of 59.18% with steam and CaCO3. Statistical analysis indicated that CaCO3 and steam influence H2 production by increasing 15.8% and 10.8%, respectively, with a CaCO3/biomass ratio of 1% (w/w) and a Steam/biomass ratio of 11% (w/w). Main statistical effects were found for CGE increase of 5% with the addition of steam, 10% with CaCO3, and synergy of 10% using CaCO3 and steam simultaneously.



中文翻译:

CaCO3 和空气/蒸汽对玉米芯气化和生物氢性能的影响:在哥伦比亚加勒比地区的应用

玉米芯是全球最丰富的农业工业废物之一。它代表了每年 1500-55 亿吨的生物能源原料。玉米芯的形状和尺寸适合在下吸式气化炉中无需预处理(粉碎、致密化或干燥)即可气化。然而,其挥发性成分(约 80% DAF)会产生高焦油含量,这对采用该技术提出了挑战。在目前的工作中,评价空气-蒸汽混合物和碳酸钙 CaCO 3 的效果以无谷玉米芯为原料,在 40 kW 气化炉中作为重整和气化反应的促进剂进行。四种实验处理的方差分析用于确定对合成气成分、氢气产率 (yH 2 )、合成气低热值 (LHV gas ) 和冷气效率 (CGE)的主要统计和交互影响。结果表明,最高气化性能实现了 310 Nml/g 的制氢产率、4.8 MJ/Nm 3的 LHV气体值和 59.18% 的蒸汽和 CaCO 3冷气效率。统计分析表明CaCO 3和蒸汽对H 2有影响产量分别增加 15.8% 和 10.8%,CaCO 3 /生物质比为 1% (w/w),蒸汽 / 生物质比为 11% (w/w)。被发现的5%CGE增加与加入蒸汽,用碳酸钙10%主要统计效应3,和使用的CaCO 10%协同3和蒸汽同时。

更新日期:2021-08-15
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