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Catalysts
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Catalysis in Biofuel/Biomass Processing Technologies
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Catalysis in Biofuel/Biomass Processing Technologies

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Biomass Catalysis".

Deadline for manuscript submissions: closed (30 April 2023) | Viewed by 5240

Special Issue Editor

Prof. Dr. Suyin Gan

E-Mail Website
Guest Editor
Department of Chemical and Environmental Engineering, University of Nottingham Malaysia, Jalan Broga, 43500 Semenyih, Selangor Darul Ehsan, Malaysia
Interests: biofuel/biomass processing technologies; combustion and emissions of biofuels; water and soil remediation

Special Issue Information

Dear Colleagues,

Rising concerns over global warming and climate change associated with fossil fuel use have led to the development of biofuels and biomass-derived products. Currently, biomass conversion technologies such as gasification and pyrolysis offer significant potential to produce biofuels and/or chemicals. In relation to this, superior catalysts characterized by high activity and selectivity are needed to further develop the conversion technologies of biomass into value-added products. This Special Issue welcomes both short review and original research papers on all aspects of homogeneous, heterogeneous, and enzymatic catalysis in biofuel production and biomass processing. Papers dealing with catalyst development, lifetime, and regeneration are especially welcomed.

Prof. Dr. Suyin Gan
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Catalysts is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2200 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • biofuel
  • biomass conversion
  • enzymes
  • gasification
  • heterogeneous catalyst
  • homogeneous catalyst
  • pyrolysis

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Published Papers (2 papers)

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Research

19 pages, 1713 KiB  
Article
Three-Step Purification and Characterization of Organic Solvent-Tolerant and Alkali-Thermo-Tolerant Xylanase from Bacillus paramycoides T4 [MN370035]
by Soni Tiwari, Ranjan Singh, Janardan Yadav, Rajeeva Gaur, Anurag Singh, Jay Shankar Yadav, Prabhash Kumar Pandey, Santosh Kumar Yadav, Jaya Prajapati, Pukhrambam Helena, Jayant Dewangan and Farrukh Jamal
Catalysts 2022, 12(7), 749; https://doi.org/10.3390/catal12070749 - 7 Jul 2022
Cited by 8 | Viewed by 2126
Abstract
In the present study, an extracellular alkali-thermo-tolerant xylanase from Bacillus paramycoides was produced in the presence of an organic solvent. The enzyme was purified by ammonium sulphate precipitation, gel filtration, and ion exchange chromatography, with an overall recovery of 25.9%. The purified enzyme [...] Read more.
In the present study, an extracellular alkali-thermo-tolerant xylanase from Bacillus paramycoides was produced in the presence of an organic solvent. The enzyme was purified by ammonium sulphate precipitation, gel filtration, and ion exchange chromatography, with an overall recovery of 25.9%. The purified enzyme hada 70 kDa molecular weight (MW) confirmed by SDS-PAGE gel analysis. The maximum enzyme activity was reported at 55 °C and pH 7.0. Xylanase activity and stability were improved in the presence of 30% (v/v) n-dodecane, iso-octane, n-decane, and cyclohexane (7 days). The enzyme activity was improved by Co2+, EDTA, and Triton-X-100 while vigorously repressed by Hg2+ and Cu2+. The purified enzyme showed 1.473 mg/mL Km and 654.017 µg/mL/min Vmax values. The distinctive assets of the isolate verified the potential application in the field of biomass conversion into fuel and other industrial processes. Organic solvent-tolerant xylanases can be used for concurrent saccharification and bioethanol production, the amplification of intoxicating beverages, and the fermenting industry. Full article
(This article belongs to the Special Issue Catalysis in Biofuel/Biomass Processing Technologies)
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13 pages, 3037 KiB  
Article
Biodiesel Synthesis from Refined Palm Oil Using a Calcium Oxide Impregnated Ash-Based Catalyst: Parametric, Kinetics, and Product Characterization Studies
by Wilson Wei Sheng Ho, Hoon Kiat Ng and Suyin Gan
Catalysts 2022, 12(7), 706; https://doi.org/10.3390/catal12070706 - 27 Jun 2022
Cited by 2 | Viewed by 2370
Abstract
Heterogeneous catalyzed transesterification has been proposed as a promising technology to mitigate the limitations of homogeneous transesterification such as wastewater generation, low free fatty acids, low water tolerance, and inability to recycle the catalyst. This work aims to evaluate a refined palm biodiesel [...] Read more.
Heterogeneous catalyzed transesterification has been proposed as a promising technology to mitigate the limitations of homogeneous transesterification such as wastewater generation, low free fatty acids, low water tolerance, and inability to recycle the catalyst. This work aims to evaluate a refined palm biodiesel synthesis process through heterogeneous catalyzed transesterification. Three major process variables were studied over a reaction duration of 3–6 h, including the reaction temperature (45–65 °C), percentage of catalyst loading (4–6 wt.%), and methanol to oil molar ratio (6:1–12:1). The highest biodiesel yield of 88.58% was recorded under the conditions of temperature 55 °C, catalyst loading 4 wt.% and methanol to oil molar ratio 9:1 at 5 h. A pseudo-first order reaction mechanism was applied in the kinetic analysis of the fatty acid methyl esters (FAME) concentrations. In addition, the activation energy and pre-exponential factors, as determined through the kinetic analysis, were 31.2 kJ/mol and 680.21 min−1, respectively. The key fuel properties of the produced palm biodiesel were determined to be acceptable according to the ASTM D 6751 and EN 14214 standards. The developed catalyst could feasibly be reused for the palm biodiesel synthesis up to the third cycle with lower reaction performance in the fourth cycle. Full article
(This article belongs to the Special Issue Catalysis in Biofuel/Biomass Processing Technologies)
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