[{"command":"settings","settings":{"pluralDelimiter":"\u0003","suppressDeprecationErrors":true,"user":{"uid":0,"permissionsHash":"d9587e6f410d2e7f476e3da6cb10a457c78ab82347f962bf83d9020620f901dd"}},"merge":true},{"command":"add_css","data":[{"rel":"stylesheet","media":"all","href":"\/modules\/contrib\/addtocal\/addtocal.css?t2408i"},{"rel":"stylesheet","media":"all","href":"\/themes\/custom\/cest2025\/css\/components\/node.css?t2408i"}]},{"command":"add_js","selector":"body","data":[{"src":"\/core\/assets\/vendor\/jquery\/jquery.min.js?v=3.7.1"},{"src":"\/core\/assets\/vendor\/once\/once.min.js?v=1.0.1"},{"src":"\/core\/misc\/drupalSettingsLoader.js?v=10.5.1"},{"src":"\/core\/misc\/drupal.js?v=10.5.1"},{"src":"\/core\/misc\/drupal.init.js?v=10.5.1"},{"src":"\/modules\/contrib\/addtocal\/addtocal.js?v=10.5.1"},{"src":"\/modules\/contrib\/addtocal\/addtocal-download.js?v=10.5.1"}]},{"command":"openDialog","selector":"#drupal-modal","settings":null,"data":"\n\u003Carticle class=\u0022node node--type-presentation node--promoted node--view-mode-modal\u0022\u003E\n      \u003Cdiv\u003ESession 8 - Energy recovery from waste\u003C\/div\u003E\n  \n      \u003Cb\u003E\u003Cspan\u003EModelling of Hydrogen Generation from Woody Biomass in a Novel Modular Downdraft Gasifier\u2013WGS\u2013PSA System\u003C\/span\u003E\n\u003C\/b\u003E\n  \n      \u003Cdiv\u003E\u003Cb\u003ECEST ID: cest2025_00463\u003C\/b\u003E\u003C\/div\u003E\n  \n        \u003Cdiv class=\u0022mb-3\u0022\u003E\n      \u003Cb\u003ERoom Panacea | Thu 4 Sep 2025 | 12:00 - 12:10 pm\u003C\/b\u003E\n    \u003C\/div\u003E\n  \n          \n    \n  \n      \u003Cdiv class=\u0022mt-10\u0022\u003E\n            \u003Cdiv class=\u0022clearfix text-formatted field field--name-presentation-body field--type-text-long field--label-hidden field__item\u0022\u003EAn advanced model was developed in Aspen Plus to simulate and optimize hydrogen-rich syngas production from a PP30-scale downdraft biomass gasifier integrated with Water-Gas-Shift (WGS) and pressure-swing adsorption (PSA). The adiabatic model combines equilibrium RGibbs blocks with corrective RStoic char\u2013gas reactions and was validated against four independent experiments, predicting H\u2082 and CO within \u00b1 1 % error. Sensitivity analysis identified an optimum \u201cwindow\u201d of T_pyrol at700 \u00b0C, T_gas at 900 \u00b0C, and equivalence ratio of 0.25, which double H\u2082 molar fraction to 40 wt % after a two-stage WGS system (S\/C = 3, T_LT = 200 \u00b0C). Replacing air with pure O\u2082 as the gasifying agent effectively eliminates N\u2082 dilution, increasing H\u2082 concentration to 59 wt % raising the LHV from 4.5 to 6.7 MJ Nm\u207b\u00b3. A dual-column, four-step PSA (P_ads = 9.8 bar) delivers 98 % purity at 56 % recovery, while halving the purge stream improves recovery to 64 % with negligible purity loss. The combined interventions provide a realistic pathway for decentralized, biomass-derived clean hydrogen production, which competes with electrolysis on energy density and cleanup requirements. Future work will automate methane correction within Aspen and extend the flowsheet for full techno-economic assessment.\u003C\/div\u003E\n      \u003C\/div\u003E\n  \n  \u003Cdiv class=\u0022mt-5 mb-5\u0022\u003E\n          \u003Cspan\u003E\n          \u003Cb\u003EPresenter:\u003C\/b\u003E\n                      \u003Cp\u003E\n            Prof Epameinondas Voutsas\n            \u003C\/p\u003E\n                  \u003C\/span\u003E\n      \u003C\/div\u003E\n\n  \u003Cdiv class=\u0022mb-5\u0022\u003E\n          \u003Cdiv class=\u0022field__label\u0022\u003E\n        Authors\n      \u003C\/div\u003E\n              \u003Cp\u003E\n          Nikoletta Kostopoulou\n        \u003C\/p\u003E\n              \u003Cp\u003E\n          Georgia Pappa\n        \u003C\/p\u003E\n              \u003Cp\u003E\n          Konstantinos Voutsas\n        \u003C\/p\u003E\n              \u003Cp\u003E\n          Dimitrios Liakos\n        \u003C\/p\u003E\n              \u003Cp\u003E\n          Nikolaos Prinos\n        \u003C\/p\u003E\n              \u003Cp\u003E\n          Stergios Vakalis\n        \u003C\/p\u003E\n              \u003Cp\u003E\n          Epameinondas Voutsas\n        \u003C\/p\u003E\n            \u003C\/div\u003E\n\n\u003C\/article\u003E\n","dialogOptions":{"width":"700","position":{"my":"right top","at":"right top"},"closeOnEscape":true,"dialogClass":"presentation-dialog","modal":true,"title":"","classes":{"ui-dialog":"presentation-dialog"}}}]