scholarly journals Advances in Enzyme and Ionic Liquid Immobilization for Enhanced in MOFs for Biodiesel Production

Molecules ◽  
2021 ◽  
Vol 26 (12) ◽  
pp. 3512
Author(s):  
Reem Shomal ◽  
Babatunde Ogubadejo ◽  
Toyin Shittu ◽  
Eyas Mahmoud ◽  
Wei Du ◽  
...  
Keyword(s):  
Organic Ligands ◽  
Biodiesel Production ◽  
Catalyst Stability ◽  
Promising Candidate ◽  
Catalytic Systems ◽  
Highly Porous Materials ◽  
High Tunability ◽  
Catalytic Sites ◽  
Metal Organic ◽  
Highly Porous

Biodiesel is a promising candidate for sustainable and renewable energy and extensive research is being conducted worldwide to optimize its production process. The employed catalyst is an important parameter in biodiesel production. Metal–organic frameworks (MOFs), which are a set of highly porous materials comprising coordinated bonds between metals and organic ligands, have recently been proposed as catalysts. MOFs exhibit high tunability, possess high crystallinity and surface area, and their order can vary from the atomic to the microscale level. However, their catalytic sites are confined inside their porous structure, limiting their accessibility for biodiesel production. Modification of MOF structure by immobilizing enzymes or ionic liquids (ILs) could be a solution to this challenge and can lead to better performance and provide catalytic systems with higher activities. This review compiles the recent advances in catalytic transesterification for biodiesel production using enzymes or ILs. The available literature clearly indicates that MOFs are the most suitable immobilization supports, leading to higher biodiesel production without affecting the catalytic activity while increasing the catalyst stability and reusability in several cycles.

scholarly journals Facile synthesis of polyoxometalates tethered to post Fe-BTC frameworks for esterification of free fatty acids to biodiesel

RSC Advances ◽  
2019 ◽  
Vol 9 (14) ◽  
pp. 8113-8120 ◽  
Author(s):  
Qiuyun Zhang ◽  
Xiaofang Liu ◽  
Tingting Yang ◽  
Caiyan Yue ◽  
Quanlin Pu ◽  
...  
Keyword(s):  
Metal Organic Framework ◽  
Solid Acid Catalyst ◽  
Synthesis Method ◽  
Porous Metal ◽  
Acid Catalyst ◽  
Phosphomolybdic Acid ◽  
Biodiesel Production ◽  
One Pot ◽  
Metal Organic ◽  
Highly Porous

Phosphomolybdic acid was sequentially incorporated into a highly porous metal–organic framework by a one-pot synthesis method, and the prepared composite was used as an efficient and stable solid acid catalyst for biodiesel production.

Chromium(II) Metal–Organic Polyhedra as Highly Porous Materials

2017 ◽  
Vol 9 (33) ◽  
pp. 28064-28068 ◽  
Author(s):  
Jinhee Park ◽  
Zachary Perry ◽  
Ying-Pin Chen ◽  
Jaeyeon Bae ◽  
Hong-Cai Zhou
Keyword(s):  
Porous Materials ◽  
Highly Porous Materials ◽  
Metal Organic ◽  
Highly Porous

Metal–organic framework-based functional catalytic materials for biodiesel production: a review

2021 ◽  
Vol 23 (7) ◽  
pp. 2595-2618
Author(s):  
Wen-Jie Cong ◽  
Sonil Nanda ◽  
Hu Li ◽  
Zhen Fang ◽  
Ajay K. Dalai ◽  
...  
Keyword(s):  
Metal Ions ◽  
Metal Organic Framework ◽  
Organic Ligands ◽  
Biodiesel Production ◽  
Acid Base ◽  
Catalytic Materials ◽  
Metal Organic ◽  
Organic Framework

Porous MOF-based nanocatalysts prepared by assembly of organic ligands and metal ions functionalized with acid/base/enzyme used for biodiesel production.

An Overview of Metal-organic Frameworks-based Acid/Base Catalysts for Biofuel Synthesis

2020 ◽  
Vol 24 (16) ◽  
pp. 1876-1891
Author(s):  
Qiuyun Zhang ◽  
Yutao Zhang ◽  
Jingsong Cheng ◽  
Hu Li ◽  
Peihua Ma
Keyword(s):  
Alternative Fuels ◽  
Heterogeneous Catalysts ◽  
Supported Catalysts ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Flexible Structures ◽  
Biodiesel Production ◽  
Biodiesel Synthesis ◽  
Metal Organic ◽  
Organic Framework

Biofuel synthesis is of great significance for producing alternative fuels. Among the developed catalytic materials, the metal-organic framework-based hybrids used as acidic, basic, or supported catalysts play major roles in the biodiesel production. This paper presents a timely and comprehensive review of recent developments on the design and preparation of metal-organic frameworks-based catalysts used for biodiesel synthesis from various oil feedstocks, including MILs-based catalysts, ZIFs-based catalysts, UiO-based catalysts, Cu-BTC-based catalysts, and MOFs-derived porous catalysts. Due to their unique and flexible structures, excellent thermal and hydrothermal stability, and tunable host-guest interactions, as compared with other heterogeneous catalysts, metal-organic framework-based catalysts have good opportunities for application in the production of biodiesel at industrial scale.

scholarly journals Recyclable Catalysts for Alkyne Functionalization

Molecules ◽  
2021 ◽  
Vol 26 (12) ◽  
pp. 3525
Author(s):  
Leslie Trigoura ◽  
Yalan Xing ◽  
Bhanu P. S. Chauhan
Keyword(s):  
Supported Catalysts ◽  
Metal Organic Framework ◽  
Metal Nanoparticle ◽  
Homogeneous Catalyst ◽  
Catalyst Recycling ◽  
Catalytic Systems ◽  
Recyclable Catalysts ◽  
Metal Organic ◽  
Porous Organic Framework ◽  
Organic Framework

In this review, we present an assessment of recent advances in alkyne functionalization reactions, classified according to different classes of recyclable catalysts. In this work, we have incorporated and reviewed the activity and selectivity of recyclable catalytic systems such as polysiloxane-encapsulated novel metal nanoparticle-based catalysts, silica–copper-supported nanocatalysts, graphitic carbon-supported nanocatalysts, metal organic framework (MOF) catalysts, porous organic framework (POP) catalysts, bio-material-supported catalysts, and metal/solvent free recyclable catalysts. In addition, several alkyne functionalization reactions have been elucidated to demonstrate the success and efficiency of recyclable catalysts. In addition, this review also provides the fundamental knowledge required for utilization of green catalysts, which can combine the advantageous features of both homogeneous (catalyst modulation) and heterogeneous (catalyst recycling) catalysis.

scholarly journals Metal-Organic Frameworks in Oxidation Catalysis with Hydrogen Peroxide

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 283
Author(s):  
Oxana Kholdeeva ◽  
Nataliya Maksimchuk
Keyword(s):  
Hydrogen Peroxide ◽  
Liquid Phase ◽  
Selective Oxidation ◽  
Metal Organic Frameworks ◽  
Short Review ◽  
Catalytic Performance ◽  
Oxidation Catalysis ◽  
Catalyst Stability ◽  
Aqueous Hydrogen Peroxide ◽  
Metal Organic

In recent years, metal–organic frameworks (MOFs) have received increasing attention as selective oxidation catalysts and supports for their construction. In this short review paper, we survey recent findings concerning use of MOFs in heterogeneous liquid-phase selective oxidation catalysis with the green oxidant–aqueous hydrogen peroxide. MOFs having outstanding thermal and chemical stability, such as Cr(III)-based MIL-101, Ti(IV)-based MIL-125, Zr(IV)-based UiO-66(67), Zn(II)-based ZIF-8, and some others, will be in the main focus of this work. The effects of the metal nature and MOF structure on catalytic activity and oxidation selectivity are analyzed and the mechanisms of hydrogen peroxide activation are discussed. In some cases, we also make an attempt to analyze relationships between liquid-phase adsorption properties of MOFs and peculiarities of their catalytic performance. Attempts of using MOFs as supports for construction of single-site catalysts through their modification with heterometals will be also addressed in relation to the use of such catalysts for activation of H2O2. Special attention is given to the critical issues of catalyst stability and reusability. The scope and limitations of MOF catalysts in H2O2-based selective oxidation are discussed.

scholarly journals Selective Styrene Oxidation to Benzaldehyde over Recently Developed Heterogeneous Catalysts

Molecules ◽  
2021 ◽  
Vol 26 (6) ◽  
pp. 1680
Author(s):  
Marta A. Andrade ◽  
Luísa M. D. R. S. Martins
Keyword(s):  
Heterogeneous Catalysts ◽  
Carbon Materials ◽  
Oxygen Species ◽  
Styrene Oxidation ◽  
Reaction Conditions ◽  
Reactive Metal ◽  
Catalytic Systems ◽  
Tert Butyl Hydroperoxide ◽  
Metal Organic ◽  
Important Intermediate

The selective oxidation of styrene under heterogeneous catalyzed conditions delivers environmentally friendly paths for the production of benzaldehyde, an important intermediate for the synthesis of several products. The present review explores heterogeneous catalysts for styrene oxidation using a variety of metal catalysts over the last decade. The use of several classes of supports is discussed, including metal–organic frameworks, zeolites, carbon materials and silicas, among others. The studied catalytic systems propose as most used oxidants tert-butyl hydroperoxide, and hydrogen peroxide and mild reaction conditions. The reaction mechanism proceeds through the generation of an intermediate reactive metal–oxygen species by catalyst-oxidant interactions. Overall, most of the studies highlight the synergetic effects among the metal and support for the activity and selectivity enhancement.

scholarly journals Progress on Modified Calcium Oxide Derived Waste-Shell Catalysts for Biodiesel Production

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 194
Author(s):  
Hui Khim Ooi ◽  
Xin Ning Koh ◽  
Hwai Chyuan Ong ◽  
Hwei Voon Lee ◽  
Mohd Sufri Mastuli ◽  
...  
Keyword(s):  
Alternative Energy ◽  
Recent Progress ◽  
Environmental Issues ◽  
Industrial Sector ◽  
Critical Discussion ◽  
Biodiesel Production ◽  
Catalyst Stability ◽  
Animal Fat ◽  
Waste Shell ◽  
Catalytic Reactivity

The dwindling of global petroleum deposits and worsening environmental issues have triggered researchers to find an alternative energy such as biodiesel. Biodiesel can be produced via transesterification of vegetable oil or animal fat with alcohol in the presence of a catalyst. A heterogeneous catalyst at an economical price has been studied widely for biodiesel production. It was noted that various types of natural waste shell are a potential calcium resource for generation of bio-based CaO, with comparable chemical characteristics, that greatly enhance the transesterification activity. However, CaO catalyzed transesterification is limited in its stability and studies have shown deterioration of catalytic reactivity when the catalyst is reused for several cycles. For this reason, different approaches are reviewed in the present study, which focuses on modification of waste-shell derived CaO based catalyst with the aim of better transesterification reactivity and high reusability of the catalyst for biodiesel production. The catalyst stability and leaching profile of the modified waste shell derived CaO is discussed. In addition, a critical discussion of the structure, composition of the waste shell, mechanism of CaO catalyzed reaction, recent progress in biodiesel reactor systems and challenges in the industrial sector are also included in this review.

Unusual pore structure and sorption behaviour in a hexanodal zinc–organic framework material

2014 ◽  
Vol 50 (14) ◽  
pp. 1678-1681 ◽  
Author(s):  
Jinjie Qian ◽  
Feilong Jiang ◽  
Linjie Zhang ◽  
Kongzhao Su ◽  
Jie Pan ◽  
...  
Keyword(s):  
Pore Structure ◽  
Metal Organic Framework ◽  
Porous Metal ◽  
Sorption Behaviour ◽  
Metal Organic ◽  
Highly Porous ◽  
Organic Framework

A highly porous metal–organic framework structurally consists of three topological kinds of 3-connected 1,3,5-benzenetricarboxylate ligands, Zn2(COO)4, Zn3O(COO)6 and Zn4O(COO)6 SBUs, featuring a new 3,3,3,4,4,6-c hexanodal topology.

Sign in / Sign up

Export Citation Format

Share Document