Isoconversional Kinetic Analysis of Pyrolysis of Malt Waste

Abstract

Locally available malt waste or brewers' spent grain, a by-product of brewing industry, was found to be a low cost and promising biomass for pyrolysis. A kinetic studied of pyrolysis of malt waste was investigated by non-isothermal thermogravimetric analyses (TG-DTG), applying slow heating rates, 10, 15, 30 and 50 K/min, and well-defined conditions. Activation energies and Arrhenius exponential factors were inferred by different estimation methods: Kissinger, Ozawa, Starink, K-A-S and. The methods presented energy activation values of 214 - 238.23 kJ/mol. The Literature studies found activations energies values similar to those found for sugarcane bagasse pyrolysis and other types of biomasses with predominance of hemicelluloses, cellulose and lignin, respectively.

Effect of Temperature and MgCl2 Concentration on the Catalytic Pyrolysis of Malt Waste Using Response Surface Methodology

“…A Reparametrized Global Reaction (RGR) Model [16] was employed for the first time to represent the kinetic behavior of MgCl 2 -catalyzed pyrolysis of MW. The kinetic parameters were estimated using the Differential Evolution (DE) algorithm [32,[48][49][50] and then analyzed.…”

“…Silvério et al [32] studied the pyrolysis kinetics of MW using isoconversional methods and reported a global activation energy between 214.78-238.23 kJ mol À 1 . Borel et al [29] produced high added-value compounds from the analytical pyrolysis of MW, such as methoxy-2-propyl acetate, furfural and toluene.…”

“…Silvério et al [32] . studied the pyrolysis kinetics of MW using isoconversional methods and reported a global activation energy between 214.78–238.23 kJ mol −1 .…”

Secagem de resíduos de malte em uma estufa solar e em um secador solar de leito fixo

“…A cevada é um cereal utilizado principalmente pelas indústrias cervejeiras, na fabricação de malte e ocupa a quinta posição de importância econômica no mundo (Silvério et al, 2017). Uma aplicação do resíduo de cevada, que vem sendo cada vez mais explorada, é como suplemento alimentar de bovinos, uma vez que estes resíduos possuem alto valor proteico.…”