Effective Cu/Re promoted Ni-supported γ-Al2O3 catalyst for upgrading algae bio-crude oil produced by hydrothermal liquefaction

Pongsiriyakul, Kanokthip; Kiatkittipong, Worapon; Adhikari, Sushil; Lim, Jun Wei; Lam, Su Shiung; Kiatkittipong, Kunlanan; Dankeaw, Apiwat; Reubroycharoen, Prasert; Laosiripojana, Navadol; Faungnawakij, Kajornsak; Assabumrungrat, Suttichai

doi:10.1016/j.fuproc.2020.106670

Cited by 43 publications

(6 citation statements)

References 88 publications

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“…Besides, a similar result was found when the Ni 2 P/SiO 2 catalyst was employed, indicating that the Ni phosphide catalysts were less efficient for converting these compounds. Similar results were reported by Pongsiriyakul et al, [52] who compared Ni-based catalysts promoted with Cu and Re supported on alumina. They found an HDT oil with high nitrogen content when NiÀ Re/γ-Al 2 O 3 was employed, which showed mainly nitrile compounds such as hexadecane nitrile.…”

Section: Resultssupporting

confidence: 89%

Catalytic Hydrotreatment of Algal HTL Bio‐Oil over Phosphide, Nitride, and Sulfide Catalysts

et al. 2023

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Global energy demand and environmental concerns about limiting CO 2 emissions have been growing recently. This is why fuel production from renewable resources has become a priority. In this context, microalgae represent an attractive alternative carbon source. In this work, different supported catalysts, including metal phosphide, nitride, and sulfide, were tested for the hydroconversion of bio-oil issued from the hydrothermal liquefaction of microalgae. Supported Ni phosphide catalysts promoted the decarboxylation and decar-bonylation route, while NiMo nitride promoted the hydrodeoxygenation pathway. NiW sulfide catalysts were the most performant, producing a hydrotreated oil with the best higher heating value (HHV), lower aromaticity degree, and lower average molar mass. Among sulfide catalysts, NiWS/SiO 2 À Al 2 O 3 was the least active, probably due to the inhibition of acid sites by the nitrogen compounds. However, NiWS/Al 2 O 3 performed better, showing high hydrogenation performances, which contributed to the conversion of refractory compounds.

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Section: Resultssupporting

confidence: 89%

Catalytic Hydrotreatment of Algal HTL Bio‐Oil over Phosphide, Nitride, and Sulfide Catalysts

et al. 2023

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“…The reduction of the N and O content in the biocrude indicates that the removal of heteroatoms is enhanced during continuous flow HTL, mostly because of the typical reactions occurring in hydrothermal conditions such as decarboxylation, dehydration and deamination (Pongsiriyakul et al, 2021). The C content is very comparable to what was reported by Marrone et al (2018), 76.5 wt% and 72.8 wt% were found in the biocrude produced by HTL of primary and secondary SS, respectively.…”

Section: Discussionsupporting

confidence: 73%

Comparative investigation on the value-added products obtained from continuous and batch hydrothermal liquefaction of sewage sludge

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Prestigiacomo

Gong

et al. 2022

Front. Environ. Sci.

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Hydrothermal liquefaction (HTL) can be considered a promising route for the energy valorisation of waste sewage sludge (SS). However, not much information is available on continuous flow processing. In this study, the mixed SS was subjected to HTL at 350°C for 8 min in a continuous reactor with loadings of 10 wt% in the feed flow. The results show that the mass recovery reached 88%, with a biocrude yield of 30.8 wt% (3.9 wt% N content). The recovered biocrude yields are highly dependent on the selection of the recovery solvent for extraction, and dichloromethane can contribute an additional 3.1 wt% biocrude from aqueous phase, acetone can extract some pyrrole derivatives into the trapped phases. Comparable results were also achieved by performing batch reactions under the same conditions: a slightly higher biocrude yield (33.1 wt%) with an N content of 4.3 wt%. The higher N content observed in the biocrude from the batch process indicates that interactions and chelation between intermediates are enhanced during heating up and cooling period, which lead to more N-containing compounds.

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“…Hydrotreating is an effective means to remove oxygen in the form of water and nitrogen in the form of ammonia by using hydrogen in the presence of heterogeneous catalysts at elevated temperature and pressure . The majority of hydroprocessing of HTL biocrudes in the literature focuses on stand-alone hydrotreating with sulfided catalysts; however, other areas of development include coprocessing at refineries and nonsulfided catalysts . When upgraded, HTL produces high-quality fuel blendstocks.…”

Section: Introductionmentioning

confidence: 99%

“…14 The majority of hydroprocessing of HTL biocrudes in the literature focuses on standalone hydrotreating with sulfided catalysts; 14 however, other areas of development include coprocessing at refineries 15 and nonsulfided catalysts. 16 When upgraded, HTL produces highquality fuel blendstocks. Typical HTL biocrude from wet wastes has a high heating value (HHV) reported around 35− 40 MJ/kg, a combined Oxygen and Nitrogen content around 10 wt %, 17 and has also reported a significant content of sulfur.…”

Section: ■ Introductionmentioning

confidence: 99%

Scaleable Hydrotreating of HTL Biocrude to Produce Fuel Blendstocks

et al. 2021

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Hydrothermal liquefaction (HTL) offers an attractive route to produce fuel blendstocks from wet wastes. Scaleable hydrotreating data for the conversion of HTL biocrude to fuels is critical to the commercialization of HTL. Herein, we simulate the pore diffusion of hydrogen into the catalyst pores for the hydrotreating of HTL biocrudes and conclude that standard hydrotreating catalysts will be pore diffusion limited regarding hydrogen diffusion for HTL biocrude upgrading. By changing the catalyst size (crushed vs extrudate catalysts), we confirm an impact of pore diffusion on the overall hydrogenation rate of HTL biocrudes. When using whole pill extrudates, likely with pore diffusion limitations, we provide scale-able hydrotreating data for the stand-alone hydrotreating of a HTL biocrude (derived from sewage sludge). By running the reactor at two different hydrotreater scales (25x scale-up), we confirm the data quality.

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Effective Cu/Re promoted Ni-supported γ-Al2O3 catalyst for upgrading algae bio-crude oil produced by hydrothermal liquefaction

Cited by 43 publications

References 88 publications

Catalytic Hydrotreatment of Algal HTL Bio‐Oil over Phosphide, Nitride, and Sulfide Catalysts

Catalytic Hydrotreatment of Algal HTL Bio‐Oil over Phosphide, Nitride, and Sulfide Catalysts

Comparative investigation on the value-added products obtained from continuous and batch hydrothermal liquefaction of sewage sludge

Scaleable Hydrotreating of HTL Biocrude to Produce Fuel Blendstocks

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