The use of hydrogen as clean energy has been becoming more attractive, because it is the most abundant element in the universe, the lightest fuel and richest in energy per unit mass. Cassava is a commodity of great importance in several underdeveloped countries, where its products and by‐products are of great importance in the food chain of these nations. Thus, the possibility of produce hydrogen from cassava wastewater (manipueira) not only recover the energy contained in cassava wastes but also eliminate most of the hydrocyanic acid contamination problems. The aim of this study is to perform the exergy analysis of hydrogen production by steam reforming from different biogases and analyze the hydrogen production in many different scenarios, showing that cassava wastewater has great potential for hydrogen production. Four different types of methane concentration were studied: 70.25, 75.5, 80.9, and 97.14%. The exergy analysis of the process and the production of hydrogen were calculated through simulation of the process using HYSYS software version 8.0. The results from these analyzes showed this is an alternative environmentally attractive and adding values to the cassava supply chain.

中文翻译：

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Manipueira沼气制氢的火用分析

氢作为清洁能源的使用变得越来越有吸引力，因为氢是宇宙中最丰富的元素，最轻的燃料和每单位质量的能量最丰富。木薯在一些不发达国家中是非常重要的商品，在这些国家，其产品和副产品在这些国家的食物链中都非常重要。因此，从木薯废水（manipueira）生产氢气的可能性不仅可以回收木薯废物中所含的能量，而且还可以消除大多数氢氰酸污染问题。这项研究的目的是对来自不同沼气的蒸汽重整制氢进行能值分析，并在许多不同的情况下分析制氢，这表明木薯废水具有很大的制氢潜力。研究了四种不同类型的甲烷浓度：70.25％，75.5％，80.9％和97.14％。通过使用HYSYS软件8.0版对过程进行模拟，计算了过程的火用分析和氢气的产生。这些分析的结果表明，这是对环境有吸引力的另一种选择，并为木薯供应链增加了价值。