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Hydrodeoxygenation of raw bio-oil towards platform chemicals over FeMoP/zeolite catalysts
Idoia Hita,Tomás Cordero-Lanzac,Giuseppe Bonura,Catia Cannilla,José M. Arandes,Francesco Frusteri,Javier Bilbao 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.80 No.-
The hydrodeoxygenation of raw bio-oil was investigated in a continuousfixed bed reactor over a series ofFeMoP/zeolite catalysts, pursuing a maximized and stable production of phenolics and aromatics. After5 h of reaction, the catalysts reach a pseudosteady activity state. The FeMoP/HZSM-5 catalyst yields thehighest amount of carbon products (53.5 wt%) with the highest selectivity towards aromatics (13.6 wt%,dry basis) and phenolics (12.2 wt%), due to the synergy between the weak acidity of the FeMoP and themild acidity of the HZSM-5 zeolite, which minimizes dehydration and gasification. The MFI frameworkallows the sweeping of coke precursors.
Catalytic cracking of raw bio-oil under FCC unit conditions over different zeolite-based catalysts
Alvaro Ibarra,Idoia Hita,Miren J. Azkoiti,Jose M. Arandes,Javier Bilbao 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.78 No.-
The performance of different zeolite-based catalysts (HY, HZSM-5 and HBeta) on the catalytic cracking ofbio-oil has been explored, using a simulated riser reactor and resembling industrial FCC conditions. Theeffect of the C/O (catalyst/bio-oil) ratio and the zeolite types have been assessed. The level ofdeoxygenation is >61% (increasing with C/O ratio). Total hydrocarbon yield was higher for the HBetacatalyst (56 wt%), while the liquid hydrocarbons yields were relatively similar for all catalysts, obtaininghigher gasoline yields with the HY catalyst (46–55 wt%), and higher LPG yields with the HZSM-5 catalyst(12–14 wt%) due to its higher acidity. The HY zeolite produced more coke (4–7 wt%) given its capacity forretaining coke precursors within its micropores.
Miguel Sogbe,Idoia Bilbao,Francesco P. Marchese,Jon Zazpe,Annarosaria De Vito,Marta Pozuelo,Delia D’Avola,Mercedes Iñarrairaegui,Carmen Berasain,Maria Arechederra,Josepmaria Argemi,Bruno Sangro 대한간학회 2024 Clinical and Molecular Hepatology(대한간학회지) Vol.30 No.2
Background/Aims: New prognostic markers are needed to identify patients with hepatocellular carcinoma (HCC) who carry a worse prognosis. Ultra-low-pass whole-genome sequencing (ULP-WGS) (≤0.5× coverage) of cell-free DNA (cfDNA) has emerged as a low-cost promising tool to assess both circulating tumor DNA (ctDNA) fraction and large structural genomic alterations. Here, we studied the performance of ULP-WGS of plasma cfDNA to infer prognosis in patients with HCC. Methods: Plasma samples were obtained from patients with HCC prior to surgery, locoregional or systemic therapy, and were analyzed by ULP-WGS of cfDNA to an average genome-wide fold coverage of 0.3x. ctDNA and copy number alterations (CNA) were estimated using the software package ichorCNA. Results: Samples were obtained from 73 HCC patients at different BCLC stages (BCLC 0/A: n=37, 50.7%; BCLC B/C: n=36, 49.3%). ctDNA was detected in 18 out of 31 patients who received systemic treatment. Patients with detectable ctDNA showed significantly worse overall survival (median, 13.96 months vs not reached). ctDNA remained an independent predictor of prognosis after adjustment by clinical-pathologic features and type of systemic treatment (hazard ratio 7.69; 95%, CI 2.09–28.27). Among ctDNA-positive patients under systemic treatments, the loss of large genomic regions in 5q and 16q arms was associated with worse prognosis after multivariate analysis. Conclusions: ULP-WGS of cfDNA provides clinically relevant information about the tumor biology. The presence of ctDNA and the loss of 5q and 16q arms in ctDNA-positive patients are independent predictors of worse prognosis in patients with advanced HCC receiving systemic therapy.