Moisture content as a design and operational parameter for fast pyrolysis

Abstract

Highlights1. Wheat straw of three different moisture contents were subjected to fast pyrolysis 2. In contrast to expectations, drying of feedstock led to lower organic oil yields 3. These experimental results were used to model product distribution in Aspen Plus® 4. Pyrolysis gas can theoretically supply the heat demand of the process 5. Alternatively, a dryer can be integrated using waste heat for feedstock drying ii

Thermochemical and Catalytic Conversion Technologies for the Development of Brazilian Biomass Utilization

“…The heat demand associated with reactor heating, endothermic demand, or feedstock conditioning is often met with the combustion of pyrolysis by-products, mainly the gas and a fraction of the cokes [95]. Such a situation was calculated for the case of the bioliq ® pyrolysis plant [98]. as having a high LHV [95,96].…”

“…The heat demand associated with reactor heating, endothermic demand, or feedstock conditioning is often met with the combustion of pyrolysis by-products, mainly the gas and a fraction of the cokes [95]. Such a situation was calculated for the case of the bioliq ® pyrolysis plant [98]. Fast pyrolysis processes often report high liquid yields, up to 75 wt.% db., along with sensitively equal yields in gases and char, which are considered by-products.…”

“…The moisture content of a lignocellulosic feedstock will primarily impact the water content of the condensate (bio-oil), leading to phase separation in the liquid phase for high enough water contents and lowering the energy efficiency of the process [91,97,98]. Accordingly, biomass is usually utilized in fast pyrolysis if its moisture content is below 10 wt.% [92], a factor that can be achieved via drying [98].…”

Energy analysis of a micro-cogeneration unit fed by biogas as a function of pyrolysis operating parameters

“…In their study, they used the decomposition reactions of biomass to obtain the input kinetic parameters. Fonseca et al chose a Yield Reactor block for simulating wheat straw as nonconventional material and calculated properties and heat capacity of the obtained products from fast pyrolysis [33].…”

Estudo comparativo dos bio-óleos obtidos por pirólises rápida e lenta do caroço de pêssego

“…Quanto mais elevada a umidade, maior o volume de água condensada no BO, aumentando a fração aquosa e provocando redução na eficiência energética do processo, dado o alto calor específico da água (FONSECA et al, 2019).…”