Akademik Veri Yönetim Sistemi
International Hydrogen Technologies Congress, Edirne, Türkiye, 20 - 23 Haziran 2019, sa.315, ss.109
Abstract
Lignocellulosic biomass
consists mainly agricultural
and forestry residues which are considered to be the most abundant,
economical and substantial feedstock for renewable energy production.
Therefore, it has low cost and does not compete with food chain and animal
feed. Lignocellulosic biomass includes high amounts of carbohydrates, cellulose
and hemicelluloses, which can be converted into various forms of energy such as
bioethanol, biobutanol, biohydrogen and biogas. The amount of the cellulose and
hemicellulose varies according to the type of material used. Sunflower straw
has approximately 30% cellulose, 15% hemicellulose and 30% lignin content,
making it a very suitable resource for energy production. Before hydrogen and
alcohol production, pre-treatment methods which relatively increase the cost of
manufacture processes should be applied to disrupt the complex structure of lignocellulose
and convert the carbohydrate polymers into fermentable sugars. Although the
pretreatment stages may seem to cause extra costs, agricultural wastes are the
most feasible feedstock because of being a very cheap source, having a high
energy potential, and the greenhouse gas emissions that are emitted to the
environment are much lower than the fossil sources. This study evaluates that
it is more feasible to produce hydrogen or to produce alcohol from lignocellulosic
wastes in terms of environmental impact, energy efficiency and economics.
Keywords: Lignocellulose, biohydrogen,
bioethanol, biobutanol, theoretical energy potential