Special Issue "Biomass Derived Heterogeneous and Homogeneous Catalysts"

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

Deadline for manuscript submissions: 15 March 2020.

Special Issue Editors

Guest Editor
Dr. José María Encinar Martín Website E-Mail
Department of Chemical Engineering and Physical Chemistry, University of Extremadura, Avda. De Elvas s/n, 06006 Badajoz, Spain
Interests: biomass, biodiesel, biolubricants, oxidative stability, fatty acid methyl esters, catalyst, pyrolysis, gasification
Guest Editor
Dr. Sergio Nogales Delgado Website E-Mail
Department of Chemical Engineering and Physical Chemistry, University of Extremadura, Avda. De Elvas s/n, 06006 Badajoz, Spain
Interests: biomass, biodiesel, biolubricants, oxidative stability, fatty acid methyl esters, catalyst, viscosity

Special Issue Information

Dear Colleagues,

Renewable energy sources will play a decisive role in the future development of mankind. The increase in energy demand and the need of replacing fossil fuels make the development of new renewable raw materials mandatory, in order to generate sustainable fuels and chemical products.

For this reason, the production of biodiesel, bioethanol, biolubricants and the development of biorefineries are promising research fields, among other alternatives. Some of these products are currently a reality, but the large-scale economic development is still uncertain due to the competition with fossil fuels. A significant and essential issue to overcome that challenge is the research and use of new catalysts to carry out the synthesis processes of bioproducts more efficiently.

For this Special Issue, we invite papers dealing with the use of homogeneous and heterogeneous catalysts for the development of processes such as biodiesel, biolubricant or biofuel production.

More specifically, topics of interest for the Special Issue include (but are not limited to):

  • Biomass
  • Biofuels
  • Biorefinery
  • Bioproducts
  • Biochemicals
  • Biorenewables
  • Bioenergy–Biofuels by-products
  • Biodiesel
  • Biolubricants
  • Bioethanol
  • Biomethane

Dr. José María Encinar Martín
Dr. Sergio Nogales Delgado
Guest Editors

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 papers will be 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 1600 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

  • Bioproducts
  • Biodiesel
  • Bioethanol
  • Bioenergy
  • Biolubricants
  • Homogeneous and Heterogeneous Catalysts

Published Papers (1 paper)

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Research

Open AccessCommunication
One-Pot Solvent-Free Synthesis of N,N-Bis(2-Hydroxyethyl) Alkylamide from Triglycerides Using Zinc-Doped Calcium Oxide Nanospheroids as a Heterogeneous Catalyst
Catalysts 2019, 9(9), 774; https://doi.org/10.3390/catal9090774 - 14 Sep 2019
Abstract
N,N-Bis(2-hydroxyethyl) alkylamide or fatty acid diethanolamides (FADs) were prepared from a variety of triglycerides using diethanolamine in the presence of different transition metal-doped CaO nanocrystalline heterogeneous catalysts. The Zn-doped Cao nanospheroids were found to be the most efficient heterogeneous catalyst, with complete [...] Read more.
N,N-Bis(2-hydroxyethyl) alkylamide or fatty acid diethanolamides (FADs) were prepared from a variety of triglycerides using diethanolamine in the presence of different transition metal-doped CaO nanocrystalline heterogeneous catalysts. The Zn-doped Cao nanospheroids were found to be the most efficient heterogeneous catalyst, with complete conversion of natural triglycerides to fatty acid diethanolamide in 30 min at 90 °C. The Zn/CaO nanoparticles were recyclable for up to six reaction cycles and showed complete conversion even at room temperature. The amidation reaction of natural triglycerides was found to follow the pseudo-first-order kinetic model, and the first-order rate constant was calculated as 0.171 min–1 for jatropha oil aminolysis. The activation energy (Ea) and pre-exponential factor (A) for the same reaction were found to be 47.8 kJ mol–1 and 4.75 X 108 min-1, respectively. Full article
(This article belongs to the Special Issue Biomass Derived Heterogeneous and Homogeneous Catalysts)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Author: Hui Chen

Abstract: Soil respiration (Rs) is one of the major components controlling the carbon budget of terrestrial ecosystems. Aerated irrigation (AI) has been proven to increase Rs compared to control (CK), but the mechanisms of CO_2 release remain poorly understood. The objective of this study was (1) to test differences of aeration, irrigation, and their interaction on Rs, soil physical variables (soil water-filled pore spaceand temperature), and biotic properties (soil bacteria, fungi, actinomycetes, microbial biomass carbon, soil cellulase activity and dehydrogenase activity, dry biomass of tomato, androot morphology), and (2) to assess how physical and biotic variables control Rs. Therefore, three irrigation treatments included (60%, 80%, and 100% of full irrigation).Each irrigation level contained AI and CK. A total of six treatments were carried out. The results showed that AI significantly increased total root length and dry biomass of fruit compared to CK (/P/<0.05). The positive effect of irrigation on dry biomass of leaf, fruit, and root was significant (/P/<0.05). With respect to CK, greater Rs under AI (averagely 5.6% increases) was mainly driven by soil water-filled pore space, aboveground biomass, soil bacteria,and soil fungi. The results of this study are helpful for understanding the mechanisms of soil CO_2 release under aerated subsurface drip irrigation.

 

Title: Biodiesel production from castor oil by two-step catalytic transesterification: optimization of the process and economic assessment

Authors: Nuria Sánchez, José María Encinar, Sergio Nogales, Juan Félix González

Abstract: In this work, castor oil was showed as an alternative feedstock to obtain biodiesel. The production of biodiesel was optimized by the use of a two-step process. In this process fresh methanol and an homogeneous catalyst were added in each step and the glycerol produced during the first stage was removed before the second reaction. The reaction conditions were optimized, considering catalyst concentration (NaOH) and methanol:oil molar ratio for both steps. A model was developed to predict the final ester content of the biodiesel. Optimal conditions (0.08 mol·L-1 and 0.01 mol·L-1 as catalyst concentration, 5.25:1 and 3:1 as MeOH:oil molar ratio for 1st and 2nd step, respectively) were established taking into account the biodiesel quality and an economic analysis. This type of process allowed for cost saving, since the amounts of methanol and catalyst were significantly reduced. An estimation of the final manufacturing cost of biodiesel production was carried out.

 
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