Hydrogen production through gasification of whey

Elif Ece Çağlı,Nezihe Ayas,Tolga Kaan Kanatlı,Serkan Karadeniz,D Ta-Wei Lin

doi:10.1051/e3sconf/202018101001

Elif Ece Çağlı, Nezihe Ayas + Show 3 more

Open Access

https://doi.org/10.1051/e3sconf/202018101001

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Abstract

Hydrogen is one of the clean energy carriers and it is obtained from fossil and renewable energy sources and waste of the food industry. In this study, whey, which is the waste of the cheese factory, was gasified using a high-pressure batch reactor at different temperatures (300, 350, 400 ºC) and an updraft tubular reactor at (650, 700°C). In order to find out suitable gasification conditions, the effect of reaction parameters such as catalyst type (K2CO3 and NaOH), temperature (300-700 °C) and time (30-120 min) were investigated. The highest hydrogen yield (14.47 mol H2/kg Whey Powder-2) was obtained with 2.51 M NaOH at 120 min. reaction time at 400 °C.

Highlights

The energy demand has been increasing with the developing industry
Whey was subjected to gasification at various reaction temperatures (300, 350 and 400 °C) and constant reaction time (120 min) in the presence of NaOH catalyst and 1.5% wt
A high-pressure batch reactor was used for the gasification of whey with a 5.6% solid material content, using NaOH as a catalyst (0.83 M, 1.67 M, 2.51 M) at various temperatures (300, 350, 400 °C) and reaction times (60, 120 min)

Summary

Introduction

The energy demand has been increasing with the developing industry. Conventional energy sources, such as coal, petroleum and natural gas are limited and hazardous to the environment. Biomass is a clean alternative energy source that can be used to mitigate environmental pollution through the reduction of greenhouse gas emissions [1]. Production of hydrogen from biomass is divided into two groups as thermochemical (i.e. pyrolysis, gasification, and liquefaction) and biological (i.e. biophotolysis and fermentation) processes [2]. Gasification is one of the thermochemical processes that convert feedstocks into useful gases and chemicals in the presence of a gasification agent (air, oxygen, steam or a mixture of these) [3]. The compositional difference between whey and whey powder are listed in Table 1 [5]

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Conclusion