Direct synthesis of gasoline and diesel range branched alkanes with acetone from lignocellulose

2016 ◽  
Vol 18 (13) ◽  
pp. 3707-3711 ◽  
Author(s):  
Xueru Sheng ◽  
Ning Li ◽  
Guangyi Li ◽  
Wentao Wang ◽  
Aiqin Wang ◽  
...  
Keyword(s):  
Direct Synthesis ◽  
Catalyst System ◽  
High Carbon ◽  
Carbon Yield ◽  
System P ◽  
Branched Alkanes ◽  
Dual Bed

C6–C15branched alkanes were synthesized in a high carbon yield (∼80%) with acetone and hydrogen over a dual-bed catalyst system.

Dual-bed catalyst system for the direct synthesis of high density aviation fuel with cyclopentanone from lignocellulose

AIChE Journal ◽  
2016 ◽  
Vol 62 (8) ◽  
pp. 2754-2761 ◽  
Author(s):  
Xueru Sheng ◽  
Guangyi Li ◽  
Wentao Wang ◽  
Yu Cong ◽  
Xiaodong Wang ◽  
...  
Keyword(s):  
Direct Synthesis ◽  
Catalyst System ◽  
High Density ◽  
Aviation Fuel ◽  
Dual Bed

Effect of pressure on synthetic diamond crystals at high temperatures and pressures in Fe/Ni catalyst system

CrystEngComm ◽  
2021 ◽  
Author(s):  
Shuai Fang ◽  
Yongkui Wang ◽  
Liangchao Chen ◽  
Zhiyun Lu ◽  
Zhenghao Cai ◽  
...  
Keyword(s):  
Nitrogen Content ◽  
Growth Mechanism ◽  
Synthetic Diamond ◽  
Natural Diamond ◽  
Catalyst System ◽  
Necessary Condition ◽  
Ni Catalyst ◽  
Effect Of Pressure ◽  
Diamond Crystals ◽  
System P

Pressure is a necessary condition for the growth of natural diamond. Studying the effect of pressure on the nitrogen content of diamond is important for exploring the growth mechanism of...

Investigation of Methane Oxidation Reactions Over a Dual-Bed Catalyst System using18O Labelled DRIFTS coupling

ChemSusChem ◽  
2016 ◽  
Vol 10 (1) ◽  
pp. 210-219 ◽  
Author(s):  
Melissandre Richard ◽  
Daniel Duprez ◽  
Nicolas Bion ◽  
Fabien Can
Keyword(s):  
Methane Oxidation ◽  
Catalyst System ◽  
Oxidation Reactions ◽  
Dual Bed

scholarly journals Construction and Mechanism of Bacterial Cellulose With High Carbon Yield By a Stretching Orientation Method

2021 ◽  
Author(s):  
Wenjing Jiang ◽  
Zhenlin Jiang ◽  
Xin Fan ◽  
Min Zhu
Keyword(s):  
Bacterial Cellulose ◽  
Low Cost ◽  
X Ray Diffraction ◽  
High Carbon ◽  
Carbon Yield ◽  
X Ray ◽  
Graphitization Degree ◽  
Low Field ◽  
Orientation Method ◽  
Environmentally Friendly Method

Abstract Bacterial cellulose (BC)decomposes easily and the carbon residue rate is low. These factors critically restrict its application in fabricating cellulosic carbon materials. Therefore, in this paper, a simple and facile method to improve the BC carbon yield is proposed based on the stretching orientation of BC. By controlling the degree of BC deformation, the orientation and crystallinity of the BC can be adjusted, thereby sensitively affecting the graphitization degree and carbon yield of carbonized BC. Samples were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), Raman scattering, and low-field nuclear magnetic resonance (LNMR). The results indicated that when the pre-stretched strain was 40%, the crystallinity and graphitization degree of BC improved, and the carbon yield increased significantly in comparison to that of untreated BC. Thus, a low-cost, facile, and environmentally friendly method of increasing the carbon yield of BC was developed in this study.

Direct synthesis of adipic acid esters via palladium-catalyzed carbonylation of 1,3-dienes

Science ◽  
2019 ◽  
Vol 366 (6472) ◽  
pp. 1514-1517 ◽  
Author(s):  
Ji Yang ◽  
Jiawang Liu ◽  
Helfried Neumann ◽  
Robert Franke ◽  
Ralf Jackstell ◽  
...  
Keyword(s):  
Adipic Acid ◽  
Direct Synthesis ◽  
Reaction Network ◽  
Catalyst System ◽  
Environmentally Benign ◽  
Palladium Catalyzed ◽  
Bidentate Phosphine ◽  
Cost Efficient ◽  
Bidentate Phosphine Ligand ◽  
Acid Esters

The direct carbonylation of 1,3-butadiene offers the potential for a more cost-efficient and environmentally benign route to industrially important adipic acid derivatives. However, owing to the complex reaction network of regioisomeric carbonylation and isomerization pathways, a selective practical catalyst for this process has thus far proven elusive. Here, we report the design of a pyridyl-substituted bidentate phosphine ligand (HeMaRaphos) that, upon coordination to palladium, catalyzes adipate diester formation from 1,3-butadiene, carbon monoxide, and butanol with 97% selectivity and 100% atom-economy under industrially viable and scalable conditions (turnover number > 60,000). This catalyst system also affords access to a variety of other di- and triesters from 1,2- and 1,3-dienes.

scholarly journals Two-step catalytic conversion of lignocellulose to alkanes

RSC Advances ◽  
2019 ◽  
Vol 9 (41) ◽  
pp. 23727-23734 ◽  
Author(s):  
Zhuohua Sun ◽  
Daniel Buwalda ◽  
Katalin Barta
Keyword(s):  
Catalytic Conversion ◽  
High Carbon ◽  
Carbon Yield ◽  
Step Process ◽  
Lignocellulose Conversion

This work described a simple two-step process for the complete lignocellulose conversion to alkanes with high carbon yield.

Construction of polyphosphoesters with the main chain of rigid backbones and stereostructures via organocatalyzed ring-opening polymerization

2020 ◽  
Vol 11 (20) ◽  
pp. 3475-3480
Author(s):  
Yu-Jia Zheng ◽  
Guan-Wen Yang ◽  
Bo Li ◽  
Guang-Peng Wu
Keyword(s):  
Ring Opening ◽  
Main Chain ◽  
Catalyst System ◽  
Ring Opening Polymerization ◽  
System P ◽  
Organic Catalyst

A highly stereoregular polyphosphoester with a rigid cyclohexylene structure in the main chain was constructed via ring-opening polymerization (ROP) in the presence of an organic catalyst system.

Highly trans-1,4-stereoselective coordination chain transfer polymerization of 1,3-butadiene and copolymerization with cyclic esters by a neodymium-based catalyst system

2015 ◽  
Vol 6 (33) ◽  
pp. 6088-6095 ◽  
Author(s):  
Wenjie Zheng ◽  
Nan Yan ◽  
Yutian Zhu ◽  
Wenpeng Zhao ◽  
Chunyu Zhang ◽  
...  
Keyword(s):  
Chain Transfer ◽  
Catalyst System ◽  
Amphiphilic Copolymers ◽  
Cyclic Esters ◽  
System P ◽  
Chain Transfer Polymerization

Highly trans-1,4-stereoregular polybutadiene (TPB) was obtained by CCTP and novel amphiphilic copolymers (TPB-b-PCL/PLA) were successfully synthesized.

scholarly journals Robust Buchwald–Hartwig amination enabled by ball-milling

2019 ◽  
Vol 17 (7) ◽  
pp. 1722-1726 ◽  
Author(s):  
Qun Cao ◽  
William I. Nicholson ◽  
Andrew C. Jones ◽  
Duncan L. Browne
Keyword(s):  
Ball Milling ◽  
Catalyst System ◽  
Secondary Amines ◽  
Mechanochemical Method ◽  
System P

An operationally simple mechanochemical method for the Pd catalysed Buchwald–Hartwig amination of arylhalides with secondary amines has been developed using a Pd PEPPSI catalyst system.

scholarly journals Site-selective redox isomerizations of furanosides using a combined arylboronic acid/photoredox catalyst system

2020 ◽  
Vol 11 (6) ◽  
pp. 1531-1537 ◽  
Author(s):  
Victoria Dimakos ◽  
Daniel Gorelik ◽  
Hsin Y. Su ◽  
Graham E. Garrett ◽  
Gregory Hughes ◽  
...  
Keyword(s):  
Hydrogen Atom ◽  
Ribonucleotide Reductase ◽  
Boronic Acid ◽  
Catalyst System ◽  
Hydrogen Atom Transfer ◽  
Synthetic Analog ◽  
Arylboronic Acid ◽  
System P ◽  
Combined Action ◽  
Site Selective

The combined action of boronic acid, photoredox catalyst and hydrogen atom transfer mediator enables the transformation of furanosides to 2-keto-3-deoxyfuranosides, a synthetic analog of the process catalyzed by the ribonucleotide reductase enzymes.

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