A comparative study of the behavior of Chlamydomonas reinhardtii and Spirulina platensis in solar catalytic pyrolysis

Abstract

Summary The aim of this study was to investigate the behavior of two distinct microalgae species during solar catalytic pyrolysis and the influence of their chemical composition and the process variables (biomass charge, reaction time, and catalyst percentage) on the product yields and bio‐oil composition. For this purpose, solar catalytic pyrolysis of Spirulina platensis and Chlamydomonas reinhardtii was performed using hydrotalcite‐derived mixed oxides as the catalyst. To gain more insight into the effect of composition on pyrolysis behavior, the biomasses were analyzed using various analytical techniques. The results indicated that a high percentage of catalyst (47.1%) culminated in liquid yields of 42.48% and 21.31% for Chlamydomonas pyrolysis and Spirulina pyrolysis, respectively. Additionally, Spirulina pyrolysis resulted in higher solid yields compared with Chlamydomonas pyrolysis. The results also showed that Spirulina bio‐oil was rich in oxygenated compounds, probably due to its high carbohydrate content, whereas Chlamydomonas bio‐oil was rich in nitrogenated compounds because of its higher protein content. The microalgae composition (lipids, protein, carbohydrates) exerted a large influence on the catalytic pathways and led to differences in yield and product distribution. A high percentage of catalysts preferentially promoted a deoxygenation of the bio‐oil obtained from Spirulina solar pyrolysis compared with that obtained from Chlamydomonas pyrolysis.

An evidence of microalgal peptides to target spike protein of COVID-19: In silico approach

“…Notably, S. platensis is the ability to boost the immune response used for dye degradation obtained high product yield during solar catalytic pyrolysis [ 19 ]. An application of the S. maxima is that it helps in the suppression of LPS-induced pro-inflammatory cytokines [ 20 ]. Some of the applications of S. fusiformis include having a neuro-protective effect in wistar albino rats used in diets [ 21 , 22 ].…”

Catalytic pyrolysis of biomass to produce bio‐oil using layered double hydroxides (LDH)‐derived materials

“…Solar catalytic pyrolysis of Chlamydomonas reinhardtii and Spirulina platensis using MgAl‐LDO catalysts exhibited liquid yields of 50.6% and 40.4%, respectively (Andrade et al., 2020) (Table 2; No. 20 and 21).…”

A critical review on biomass pyrolysis: Reaction mechanisms, process modeling and potential challenges

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