Multi-Criteria Optimization of a Biomass-Based Hydrogen Production System Integrated With Organic Rankine Cycle

Abstract

Biomass-based gasification is an attractive and promising pathway for hydrogen production. In this work, a biomass-based hydrogen production system integrated with organic Rankine cycle was designed and investigated to predict the performance of hydrogen production yield and electricity generation under various operating conditions. The modified equilibrium model presented desirable results for the produced syngas compositions compared with the experimental data. Hydrogen yields from four types of biomass (wood chips, daily manure, sorghum, and grapevine pruning wastes) were compared under the same operating condition, with wood chips exhibiting the maximum hydrogen yield of 11.59 mol/kg. The effects of gasification temperature, equivalence ratio, and steam-to-biomass ratio on the hydrogen yield and electricity generation were investigated by using the response surface method. Furthermore, the system was optimized using a genetic algorithm based on the response surface model. A preferred optimal solution with a hydrogen yield of 39.31 mol/kg and an output power of 3,558.08 kW (0.99 kW h/kg) was selected by the linear programming technique for multidimensional analysis of the preference method.

A Review on Recent Progress in the Integrated Green Hydrogen Production Processes

“…Biomass gasification is another mature technology for hydrogen generation by converting biomass or fossil-based carbonaceous materials to syngas without combustion and under a controlled process. Compared with fossil fuels, biomass is less expensive and more widely available, reducing greenhouse gas emissions and high energy efficiency [65,66]. Biomass gasification involves a thermochemical process at high temperatures (~900 • C) and low pressure.…”

Value Proposition of Different Methods for Utilisation of Sugarcane Wastes

“…The authors of [60] designed and investigated a system for biomass-based hydrogen production integrated with the organic Rankine cycle. The aim was to predict the performance of the system, under various operating conditions, regarding hydrogen production yield and electricity generation.…”

Power to Gas Plant Design, Modelling and Control for Precise and Flexible Methane Production

“…Because gasification is oxidation with insufficient amount of oxygen supply, capacity of oxygen storage is not of significance. Temperature of the gasifier is high: between 1000 and 1600 K [7][8], and according to [9][10] gasification is assumed to be an adiabatic process. During gasification, biochar is blown by the oxygen and syngas is produced.…”

“…It is assumed, as in literature [9][10][11][12][13][14][15][16], that the gasifier is isolated from the ambient. Therefore, gasification is an adiabatic process which means that enthalpy of reactants is the same as enthalpy of products.…”

“…Oxygen as an oxidizer is preheated to 200°C [7]. Specific heat temperature dependance can be also found [10] and used which makes (8.2) to be the seventh equation of the nonlinear system with seven unknown variables: (6.1), (6.2), (6.4), (7.1), (7.2), (7.3), (8.2). This system can be solved and molar rates of each component with respect to the biochar input can be found.…”