Comparison of thermal conversion methods of different biomass types into gaseous fuel

Ларина, О. М.; Синельщиков, В. А.; Sytchev, G. A.

doi:10.1088/1742-6596/774/1/012137

Cited by 7 publications

(5 citation statements)

References 3 publications

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“…32%. Because the content of volatiles in straw is about 79.4% [19], more than half of the straw was converted into gas products. The process of drying was dominant for wood and wheat straw biomass for mw pretreatment at 448-498 K. Negligible transformation of the biomass structure occurred in this temperature range.…”

Section: The Effect Of Mw Pre-treatment On the Main Characteristics Omentioning

confidence: 99%

Thermal Decomposition and Combustion of Microwave Pre-Treated Biomass Pellets

et al. 2021

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The objective of the study was to investigate a more effective use of commercially available biomass pellets (wheat straw, wood, peat) using microwave pretreatment to improve heat production. Pellets were pretreated using the originally designed microwave torrefaction device. The effects of microwave (mw) pretreatment were quantified, providing measurements of the weight loss and elemental composition of pellets and estimating the effect of mw pretreatment on their porosity, surface area and calorific values at pretreatment temperatures of T = 448–553 K. Obtained results show that the highest structural variations and elemental composition during mw pretreatment were obtained for wheat straw pellets, with an increase in reactivity, a decreasing in the duration of the thermal decomposition by about 40% and an increase in the yield of combustible volatiles. Increased reactivity of pretreated pellets enhanced the ignition and burnout of volatiles, decreasing the duration of the burnout of pretreated wheat straw, wood and peat pellets by 40%, 24% and 9%, respectively, and increasing the peak and average values of the flame temperature, heat output, and produced heat energy by 40–50%, with a correlating increase of combustion efficiency and the mass fraction of carbon-neutral CO2 emission. Thus, the applicability of microwave pretreatment for the control and improvement of heat production was confirmed.

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Section: The Effect Of Mw Pre-treatment On the Main Characteristics Omentioning

confidence: 99%

Thermal Decomposition and Combustion of Microwave Pre-Treated Biomass Pellets

et al. 2021

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“…Wood, wheat straw, and peat have different elemental, chemical compositions, surface area, porosity, and contents of volatile matter in raw biomass. A higher content of volatile matter was found in wood (84.1%) and wheat straw biomass (74.8%), whereas the lowest contents of volatiles were found in peat biomass (67.6%) [32]. It was shown that MW pre-treatment of wood and wheat straw pellets produced a higher heat output as a result of volatiles combustion if compare with that of raw biomass pellets.…”

Section: Thermal Decomposition Of Selectively Activated Biomass Blendsmentioning

confidence: 88%

Thermo-Chemical Conversion of Microwave Selectively Pre-Treated Biomass Blends

et al. 2022

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Possibilities of more efficient use of regional lignocellulosic resources (wood, wheat straw, peat) of different origin for an environmentally friendly energy production using selectively MW pre-treated blends of commercial wood or wheat straw pellets with raw peat pellets are studied. A hypothesis is proposed and tested that selective MW pre-treatment of wood or wheat straw pellets at the frequency 2.45 GHz and blending of MW pre-treated pellets with raw peat pellets can be used to enhance and control the thermo-chemical conversion of biomass blends. To test this hypothesis, a combined experimental study and mathematical modelling of the processes were performed. The thermo-chemical conversion of selectively activated blends was experimentally studied using a batch-size pilot device, which consists of a biomass gasifier and a combustor. To evaluate the effect of selective MW pre-treatment of biomass pellets on the thermo-chemical conversion of pre-treated blends, measurements of the kinetics of weight loss, yield of combustible volatiles, flame temperature, heat output of the device, and composition of emissions were made at different MW pre-treatment regimes of wheat straw and wood pellets and different mass fractions of pre-treated pellets in biomass blends. The developed novel 2D numerical model of thermo-chemical conversion of MW pre-treated straw confirmed that the pre-treatment of wheat straw pellets increases the generated heat and significantly affects the temperature distribution in the flame/bed zones. It was confirmed that MW pre-treatment leads to a faster thermal decomposition of biomass pellets, synergistically activating the non-treated parts of blends. The overall improved yield of combustible volatiles and their complete combustion provide a surplus of heat production by limiting the formation of GHG emissions, which allows promoting MW pre-treated biomass of different origin as efficient regional bioenergy resources for energy production.

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“…Several works have been focused on the production of gas, due to its good properties for use as biofuel, and biochar, which can be used as fuel, adsorbent, soil amendment, etc. [3][4][5]. The recovery and use of bio-oil is more challenging because it is composed of an organic and an aqueous fraction, both containing a complex mixture of compounds [6].…”

Section: Introductionmentioning

confidence: 99%