Online NMR measurements are introduced in the current study as a new analytical setup for investigation of the oxymethylene dimethyl ether (OME) synthesis. For the validation of the setup, the newly established method is compared with state-of-the-art gas chromatographic analysis. Afterwards, the influence of different parameters, such as temperature, catalyst concentration and catalyst type on the OME fuel formation based on trioxane and dimethoxymethane is investigated. As catalysts, Amberlyst 15 (A15) and trifluoromethanesulfonic acid (TfOH) are utilized. A kinetic model is applied to describe the reaction in more detail. Based on these results, the activation energy (A15: 48.0 kJ mol and TfOH: 72.3 kJ mol ) and the order in catalyst (A15: 1.1 and TfOH: 1.3) are calculated and discussed.

Download full-text PDF

Source
http://dx.doi.org/10.1002/chem.202203776DOI Listing

Publication Analysis

Top Keywords

ether ome
8
ome fuel
8
oxymethylene ether
4
catalyst
4
fuel catalyst
4
catalyst screening
4
screening situ
4
situ nmr
4
nmr spectroscopy
4
spectroscopy online
4

Similar Publications

In the search for alternative energy carriers that can replace conventional fossil fuels, sustainably produced oxygenated hydrocarbons represent a promising class of potential candidates. An illustrative member of this class of alternative biofuels are oxymethylene ethers (OMEs). This study makes a contribution to this objective by investigating hydroxy ethers, specifically methoxymethanol, ethoxymethanol, and 2-methoxyethanol.

View Article and Find Full Text PDF

Opioid free versus opioid sparing strategies for multimodal antinociception during laparoscopic colectomy: a randomised controlled trial.

Anaesth Crit Care Pain Med

December 2024

Department of Anesthesiology and Perioperative Medicine, David Geffen School of Medicine, University of California Los Angeles, California, United States. Electronic address:

Article Synopsis
  • The study aimed to determine if opioid-free anesthesia (OFA) could reduce postoperative opioid use during laparoscopic colectomy compared to opioid-sparing anesthesia (OSA).
  • In a clinical trial with 160 patients, those receiving OFA did not show significantly lower opioid consumption 48 hours post-surgery compared to those on OSA.
  • Both anesthesia methods resulted in similar pain control and adverse events, although the OFA group experienced increased bradycardia incidents.
View Article and Find Full Text PDF

Structural changes and grading mechanism of lignin during solid alkali-active oxygen extraction and grading.

Int J Biol Macromol

November 2024

Xiamen Key Laboratory of Clean and High-valued Utilization for Biomass, College of Energy, Xiamen University, Xiamen 361102, China; Fujian Engineering and Research Center of Clean and High-valued Technologies for Biomass, College of Energy, Xiamen University, China, 361102, China. Electronic address:

Cooking with active oxygen and solid alkali (CAOSA) is an efficient pretreatment method for biomass. For better grading of the lignin yellow liquor, the different lignin fractions and the recovered solid alkali were obtained using a simultaneous acid-alkali graded separation method. The results indicated that the recovery rate of solid alkali was 67.

View Article and Find Full Text PDF

The urgent need for sustainable alternatives to fossil fuels in the transportation sector is driving research into novel energy carriers that can meet the high energy density requirements of heavy-duty vehicles without exacerbating the climate change. This concept article examines the synthesis, mechanisms, and challenges associated with oxymethylene ethers (OMEs), a promising class of synthetic fuels potentially derived from carbon dioxide and hydrogen. We highlight the importance of OMEs in the transition towards non-fossil energy sources due to their compatibility with the existing Diesel infrastructure and their cleaner combustion profile.

View Article and Find Full Text PDF

In the present work, derivatives of phenanthridine-6(5)-ones and benzo[]chromenes were efficiently prepared through an intramolecular C-H bond functionalization reaction catalyzed by photochemically synthesized Pd-PVP nanoparticles. The heterocycles were obtained intramolecular arylation of the corresponding -methyl--aryl-2-halobenzamide or aryl-(2-halo)benzyl ethers using KCO as base in a mixture of HO : DMA as solvent without additives or ligands. High yields of the heterocyclic compounds were achieved (up to 95%) using a moderately low catalyst loading (1-5 mol%) under an air atmosphere at 100 °C.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!