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Effect of pellet die diameter on density and durability of pellets made from high moisture woody and herbaceous biomass

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Carbon Resources Conversion 2018年第1期1卷 44-54页

作者： jaya shankar tumuluru 750 University Blvd Biofuels DepartmentEnergy Systems LaboratoryIdaho National LaboratoryIdaho FallsID 83415-3750USA

Densified products produced from pellet mill are commercially used as a commodity type product for energy applications that are transported nationally and *** quality of the pelletized biomass produced depends on the process variables such as die diameter,length to diameter(L/D)ratio,die speed,preheating,and steam conditioning;and feedstock variables such as feedstock type,moisture content,and particle size and *** the present study,pelleting tests were conducted with both woody(i.e.,lodgepole pine and pinyon-juniper)and herbaceous(i.e.,corn stover,wheat straw,and energy sorghum)biomass.A high level of feedstock moisture content of 33%(w.b.)was selected,while the die speed and preheating temperature process variables were kept at 60 Hz(380 rpm)and 70*** indicated that during the pelleting and cooling process,an approximate 10–13%(w.b.)moisture loss in both the woody and herbaceous biomass was *** high moisture pellets produced were further dried in a laboratory oven at 70C for three hours to reduce the moisture content of the pellets to1133,>580,>620 kg/m3)and the woody biomass lodgepole pine(e.g.,>1037,>568,>641 kg/m3),*** the case of durability for the 8 mm diameter pellets,wheat straw and corn stover recorded a maximum of about 96%,respectively,while the lodgepole pine and pinion juniper recorded a maximum of>96%,respectively.

关键词： Woody and herbaceous biomass High moisture pelleting Unit Bulk density Tapped density Durability

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Impact of hydrolysis on surface area and energy storage applications of activated carbons produced from corn fiber and soy hulls

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Carbon Resources Conversion 2020年第1期3卷 19-28页

作者： Zachary D.Herde Ruchira Dharmasena Gamini Sumanasekera jaya shankar tumuluru Jagannadh Satyavolu Conn Center for Renewable Energy Research University of LouisvilleLouisvilleKYUSA Energy Systems Laboratory Idaho National LaboratoryIdaho FallsIDUSA School of Chemical and Biomolecular Eng Georgia Institute of TechnologyUnited States

Complete utilization of lignocellulosic biomass through the creation of value-added coproducts is one of the key strategies of the Bioenergy Technologies Office(BETO)for the cost-effective production of biofuels and biochemicals.A green approach to producing lightweight and high specific surface area(SSA)activated carbons(ACs)from sustainable biomass sources is of great interest to producers and users of energy devices such as batteries and *** direct conversion from biomass has been studied extensively,AC with relatively high surface areas can be produced more cost-effectively when leveraged as a co-product from a *** this paper,we discuss the production of high specific surface area activated carbons from residual fiber(fiber remaining after extraction of C5-sugars)generated as part of a C5 *** surface,morphological characteristics using SEM and TEM,and energy storage behavior of ACs produced using the C5 extracted residual fiber were evaluated in the present *** ACs produced from the residual fiber delivered an order of magnitude higher surface area than the one directly from corn pericarp fiber and soy *** surface area of the ACs produced from pre-hydrolysis DDG was only 10 m^(2)/g compared to 689 m^(2)/g for soy hulls whereas after hydrolysis these values increased significantly(DDG:1700 m^(2)/g and soy hulls:1300 m^(2)/g).TEM images indicated high exfoliation,explaining the change in surface area *** the same current density(500 mA/g)the cycling performance of the ACs increased as the surface area increased significantly.

关键词： Agricultural residues Hydrolysis Activated carbon Surface area characterization Surface morphology

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