Biomass gasification for syngas and biochar co-production: Energy application and economic evaluation

Abstract

Syngas and biochar are two main products from biomass gasification. To facilitate the optimization of the energy efficiency and economic viability of gasification systems, a comprehensive fixed-bed gasification model has been developed to predict the product rate and quality of both biochar and syngas. A coupled transient representative particle and fixbed model was developed to describe the entire fixed-bed in the flow direction of primary air. A three-region approach has been incorporated into the model, which divided the reactor into three regions in terms of different fluid velocity profiles, i.e. natural convection region, mixed convection region, and forced convection region, respectively. The model could provide accurate predictions against experimental data with a deviation generally smaller than 10%. The model is applicable for efficient analysis of fixed-bed biomass gasification under variable operating conditions, such as equivalence ratio, moisture content of feedstock, and air inlet location. The optimal equivalence ratio was found to be 0.25 for maximizing the economic benefits of the gasification process.

Influence of metal (Fe/Zn) modified ZSM‐5 catalysts on product characteristics based on the bench‐scale pyrolysis and Py‐GC/MS of biomass

“…After the introduction of a catalyst, the yield of CO decreased to varying degrees, while the yield of CO 2 increased. These results indicate that the increase in the secondary reaction had a significant effect on the production of CO 2 …”

Carbon conversion and stabilisation of date palm and high rate algal pond (microalgae) biomass through slow pyrolysis

“…Energy economics defines the economic aspect of the biochar gain of energy with the input cost. There is a limited number of studies calculating the economic aspect of the process to produce biochar . The economic aspect (EV) of the biochar could be presented by the following equations: …”

“…There is a limited number of studies calculating the economic aspect of the process to produce biochar. 40 The economic aspect (EV) of the biochar could be presented by the following equations:…”

Sensitivity Analysis of Different Parameters on the Performance of a CHP Internal Combustion Engine System Fed by a Biomass Waste Gasifier

“…The two most important methods of conversion are conversion to power and to biofuel [12]. For the former, one of the most feasible and productive ways is thermochemical conversion [13]. Among the thermochemical processes, gasification is one of the most effective and studied methods to produce energy and fuels from biomass due to its capacity to handle different biomass feedstock [13][14][15][16].…”

“…For the former, one of the most feasible and productive ways is thermochemical conversion [13]. Among the thermochemical processes, gasification is one of the most effective and studied methods to produce energy and fuels from biomass due to its capacity to handle different biomass feedstock [13][14][15][16]. Gasification, through the partial oxidation of the biomass at high temperature in the range of 800-1000 • C [17,18], with air, oxygen, and/or steam as a gasifying agent, allows for the production of a final product called syngas [19].…”