Mobile power generation system based on biomass gasification

Abstract

Disaster-hit and/or un-electrified remote areas usually have electricity accessibility issues and an abundance of plant-derived debris and wood from destroyed wooden structures; this can be potentially addressed by employing a decentralized ultra-small biomass-fed gasification power generating system. This paper presents an assessment of the technical viability of an ultra-small gasification system that utilizes densified carbonized wood pellets/briquettes. The setup was run continuously for 100 h. A variety of biomass was densified and carbonized by harnessing fugitive heat sources before charging into the reactor. Carbonized briquettes and furnished blends exhibited inferior gasification performance compared to the carbonized pellets. In the absence of tar blockage problems, steady-state conditions were achieved when pre-treated feedstock was used. Under steady-state conditions for carbonized pellets gasification operated at an equivalence ratio of 0.32, cold gas efficiency and carbon conversion achieved 49.2% and 70.5%, respectively. Overall efficiency and maximum power output of 20.3% and 21 kW were realised, respectively. It was found that the system could keep stable while the low heating valve of syngas was over 4 MJ/m3 on condition that avoiding tar blocking issues. The results indicate that the proposed compact ultra-small power generation system is a technically feasible approach to remedy power shortage challenge. In addition, process simulation considering carbonized wood gasification combined power generation was formulated to produce syngas and electricity. Woody pellets with the flow rate of 20 kg/h could generate a 15.18 kW power at the air flow rate of 40 Nm3/h, which is in a good agreement with 15 kW in the 100 h operation. It is indicated that the gasification combined power generation cycle simulated by Aspen simulator could achieve reliable data to assist the complicated experiment operation.

Multiscale analysis of fine slag from pulverized coal gasification in entrained-flow bed

“…Accordingly, it is urgent to realize the efficient and clean utilization of coal (Yang 2022;Chai 2021). Coal gasification technology is one of the main methods in this regard (Wang 2021a, b;Cao 2021;Ding et al 2022;Smolinski et al 2022;Zhakupov et al 2022). However, gasification generates a large amount of solid waste, known as fine slag (FS), which is usually disposed in landfills and causes environmental pollution.…”

Carbon‐negative syngas production: A comprehensive assessment of biomass pyrolysis coupling chemical looping reforming

“…Biomass is the only renewable organic carbon resource available in nature and is considered a carbon‐neutral material, making it an essential substitute for fossil fuels to achieve carbon neutrality 7,8 . Among the various methods of biomass utilization, biomass gasification for syngas is one of the most critical 9,10 . Syngas is a versatile intermediate product that can be converted into various important chemical products such as methanol, glycol, liquid fuels through Fischer–Tropsch synthesis, and green hydrogen via water–gas shift reaction 11,12 .…”

Performance Evaluation of Torrefaction Coupled with a Chemical Looping Gasification Process under Autothermal Conditions: Flexible Syngas Production from Biomass

“…After regeneration, the OC carries the heat from the oxidation reaction and returns to the GR . The heat carried by the OC is utilized for the gasification reaction. , The OC can prevent the dilution of syngas and reduce energy consumption relative to conventional gasification agents. , In the BCLG process, metallic OC transport lattice oxygen atoms and catalyze tar for cracking or reforming in gasification, thereby significantly reducing the content of tar in syngas. , Compared with fluidized-bed steam gasification processes, fluidized-bed BCLG has higher cold gas efficiency, lower tar production, and higher syngas production. , For example, in the experiments of Tian et al , the tar yield in the CLG process was reduced by 30–67% . However, the inherent properties of woody biomass present new challenges for CLG, such as high water content, low energy density, and high O/C ratio, which can lead to significantly reduced gasification efficiency. , Drying and granulation of biomass is also an essential prerequisite for BCLG, depending on the original form of the biomass, which also inevitably increases the system complexity and equipment cost …”