Incorporation of solar-thermal energy into a gasification process to co-produce bio-fertilizer and power

Shahid H. Ansari, Ashfaq Ahmed, Abdul Razzaq, Diane Hildebrandt, Xinying Liu, Young Kwon Park

Research output: Contribution to journalArticlepeer-review

29 Scopus citations

Abstract

Biomass integrated gasification combined cycle (IGCC) is attracting increased interest because it can achieve high system energy efficiency (>50%), which is predicted to increase with the increase in the solar share in biomass IGCC. This study evaluated the potential of crop residues numerically for the co-production of power and bio-fertilizer using ASPEN Plus® simulation software. The results showed that the gas yield increases with increasing temperature and decreasing pressure while the yield of bio-fertilizer is dependent on the biomass composition. The biomass with a low ash content produces high bio-fertilizer at the designated gasification temperature. The IGCC configuration conserves more energy than a directly-fired biomass power plant. In addition, the solar-assisted IGCC attains a higher net electricity output per unit of crop residue feed and achieves net thermal efficiencies of around 53%. The use of such hybrid systems offer the potential to produce 0.55 MW of electricity per unit of solar-thermal energy at a relatively low cost. The ASPEN Plus model predicted that the solar biomass-based IGCC set up is more efficient in increasing the power generation capacity than any other conversion system. The results showed that a solar to electricity efficiency of approximately 55% is achievable with potential improvements. This work will contribute for the sustainable bioenergy production as the relationship between energy production and biomass supplies very important to ensure the food security and environmental sustainability.

Original languageEnglish
Article number115103
JournalEnvironmental Pollution
Volume266
DOIs
StatePublished - Nov 2020

Keywords

  • Bio-fertilizer
  • Concentrated solar power
  • Gasification
  • Integrated gasification combined cycle
  • Syngas

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