title: Conceptual design of an integrated hydrothermal liquefaction and biogas plant for sustainable bioenergy production.
abstract: Initial process studies carried out in Aspen Plus on an integrated thermochemical conversion process are presented herein. In the simulations, a hydrothermal liquefaction (HTL) plant is combined with a biogas plant (BP), such that the digestate from the BP is converted to a biocrude in the HTL process. This biorefinery concept offers a sophisticated and sustainable way of converting organic residuals into a range of high-value biofuel streams in addition to combined heat and power (CHP) production. The primary goal of this study is to provide an initial estimate of the feasibility of such a process. By adding a diesel-quality-fuel output to the process, the product value is increased significantly compared to a conventional BP. An input of 1000 kg h(-1) manure delivers approximately 30-38 kg h(-1) fuel and 38-61 kg h(-1) biogas. The biogas can be used to upgrade the biocrude, to supply the gas grid or for CHP. An estimated 62-84% of the biomass energy can be recovered in the biofuels.
authors.affiliation: Department of Energy Technology, Aalborg University, Pontoppidanstræde 101, 9220 Aalborg, Denmark. jho@et.aau.dk
authors.forename: Jessica
authors.initials: J
authors.lastname: Hoffmann
authors.forename: Souman
authors.initials: S
authors.lastname: Rudra
authors.forename: Saqib S
authors.initials: SS
authors.lastname: Toor
authors.forename: Jens Bo
authors.initials: JB
authors.lastname: Holm-Nielsen
authors.forename: Lasse A
authors.initials: LA
authors.lastname: Rosendahl
mesh_terms: D056804:Biofuels; D011211:Electric Power Supplies; D004867:Equipment Design; D006361:Heating / Q000295:instrumentation*; D059205:Renewable Energy; D018511:Systems Integration
chemical_list: D056804:Biofuels