Two defective MOF-808 materials synthesized by a facile mixed-linker approach show significantly higher adsorption capacity compared to standard MOF-808.

Valorization of pineapple peel waste is an attractive research topic because the huge quantities this byproduct generated from processing industries. In study, extract was collected to produce a hydrogel-like form containing bacterial cellulose fibers with three-dimensional structure and nanoscale diameter by Acetobacter xylinum fermentation process. The suspension subsequently activated freeze-drying, affording lightweight aerogels as potential adsorbents in wastewater treatment, particular...

The electrochemical transformation of biomass-derived compounds (e.g., aldehyde electroreduction to alcohols) is gaining increasing interest due the sustainability this process that can be exploited produce value-added products from biowastes and renewable electricity. In framework, conversion 5-hydroxymethylfurfural (HMF) 2,5-bis(hydroxymethyl)furan (BHMF) studied. Nanostructured Ag deposited on Cu an active selective electrocatalyst for formation BHMF in basic media. However, catalyst...

Diesel oxidation catalysts (DOC) were investigated for activity, NO conversion stability, and sulfur poisoning/regeneration on Pd/Al2O3, Pt/Al2O3, Pd–Pt/Al2O3 catalysts. The Pd/Al2O3 catalyst was more active CO hydrocarbon (C3H6 C3H8) oxidation, while the Pt/Al2O3 efficiently oxidized NO. formation of a Pd–Pt alloy in maintained Pd reduced phase, resulting superior activity this CO, C3H6, comparison with its monometallic counterparts. not only provided low-temperature but also retained...

Methanol synthesis from CO2 hydrogenation has drawn global attention as catalytic is an attractive choice to mitigate emissions and lessen dependency on fossil resources. In the present study, we have synthesized ZrO2 CeO2-supported In2O3 catalysts for methanol performances of Inx/ZrO2, Inx/CeO2 (x = 1 % 13 %) were compared. Specifically, effect CeO2 supports catalyst during was explored. This study reveals that support increased activity while decreased although both almost same indium...

Major hurdles in Kraft lignin valorization require selective cleavage of etheric and C–C linkages subsequent stabilization the fragments to suppress repolymerization reactions yield higher monomeric fractions. In this regard, we report development efficient NiMo sulfides ultra-stable Y zeolites for reductive liquefaction hydrodeoxygenation a Parr autoclave reactor at 400 °C 35 bar H2 (@25 °C). Comparing activity test without/with catalyst, it is revealed that over (silica/alumina = 30)...

Heavy carbon industries produce solid side stream materials that contain inorganic chemicals like Ca, Na, or Mg, and other metals such as Fe Al. These compounds usually react efficiently with CO2 to form stable carbonates. Therefore, using these streams instead of virgin capture is an appealing approach reduce emissions. Herein, we performed experimental study the mineral carbonation potential three industrial steel slags via aqueous, direct carbonation. To this end, studied absorption...

This study investigates the effect of Pt/Pd ratio on oxidation activity and sulfur poisoning/regeneration diesel catalysts (DOC) using beta zeolites with high siliceous content as support. Formation Pt-Pd alloy leads to contraction cell lattice Pt in bimetallic catalysts, improving not only sintering resistance but also retaining a fraction Pd Pd2+ form. Moreover, improves particles, which enhances for CO C3H6 oxidation. Bimetallic favor NO reduction at lower temperature than monometallic...

Passive NOx adsorption (PNA) is a novel technology to control emissions during cold start. However, the recent generation of PNA material, Pd/zeolite, suffers from major degradation under high CO concentrations. In this work, we developed form Pd/SSZ-13 by using freeze-drying process after incipient wetness impregnation. This showed better stability than sample synthesized common process. Several characterization measurements were conducted and it was found that Pd sites on freeze-dried more...

Abstract The electrocatalytic conversion of 5‐hydroxymethylfurfural (HMF), a biomass platform molecule, to 2,5‐bis(hydroxymethyl)furan (BHMF), polymer precursor, is fully sustainable route that operates at room temperature and pressure, using water as source hydrogen, avoids high H 2 pressures. In this work, we investigate the use 3D electrocatalysts, made by Ag 0 electrodeposited on Cu open‐cell foams (Ag/Cu), improve efficiency in electrochemical HMF BHMF basic media different...

Phosphorus (P) poisoning is one of the main factors accounting for deactivation diesel oxidation catalysts (DOC) apart from sulfur and sintering Pt active sites. This study compares impact P with loading up to 2.4 wt% on catalytic performance mono bimetallic Pt-Pd using alumina high silica BEA zeolites as supports. caused CO, C3H6, C3H8 NO oxidation; however, degree in terms temperatures at which 50% component converted (T50) depends not only types phase (Pt Pt-Pd) but also supports (alumina...

Pyrolysis oil (PO) assisted Kraft lignin (KL) liquefaction over an unsupported NiMoS catalyst in a paraffin solvent was explored this work. A used to represent hydrogenated vegetable (HVO) which is bio-fuel. We have for the first time showed that when co-processing with pyrolysis char formation could be completely suppressed. The complex composition of PO, containing various compounds different functional groups, able aid depolymerization pathways by obstructing condensation path reactive...

The renewable electricity-driven electrocatalytic hydrogenation of biomass-derived furanic compounds produces biopolymer (polyurethane) precursors under mild reaction conditions. widely used Ag and Cu electrocatalysts failed in the selective conversion aldehyde into alcohol concentrated electrolytes due to contribution electrodimerization. Herein, we proposed 3D CeO2-based catalysts for 5-hydroxymethylfurfural (HMF) (0.02, 0.05, 0.10 M) 2,5-bishydroxymethylfuran (BHMF). An electrodeposition...

The overall H 2 -SCR process can be divided into four temperature regions with multiple reactions over the Pt/SSZ-13 catalyst. Specific reaction processes, influencing factors and mechanisms were initially explored.

Abstract Silicon microreactors with Pt/Al 2 O 3 thin‐film wall catalyst were adopted for kinetic studies of CO preferential oxidation (PrOx). The activity this was compared to that other systems based on similar formulation. Internal and external mass‐transport heat‐transport limitations the microreactor examined comparisons made minimized packed‐bed reactors (m‐PBRs). We found at lower temperatures (<220°C), shows negligible mass‐ resistance, implying direct access intrinsic kinetics....

The influence of zeolite support materials and their impact on CH4 oxidation activity was studied utilizing Pd supported H-beta H-SSZ-13. A correlation between activity, Si/Al ratio (SAR), the type framework, reduction-oxidation behaviour, species present found by combining catalytic measurements with a variety characterization methods (operando XAS, NH3-TPD, SAXS, STEM NaCl titration). Operando XAS analysis indicated that catalysts high experienced rapid transitions metallic- oxidized-Pd...

Catalyst with a suitable balance between acidity and pore accessibility needed for lignin hydrotreatment.

This study presents a simple approach to prepare MOF-808, an ultra-stable Zr-MOF constructed from 6-connected zirconium clusters and 1,3,5-benzene tricarboxylic acid, with tailored particle sizes. Varying the amount of formic acid as modulator in range 200–500 equivalents results MOF-808 materials crystal size 40 nm approximately 1000 nm. Apart high specific surface area, combination fraction mesopore plenty acidic centers on Zr-clusters induces better interaction ionic pollutants such...

Passive NOx adsorption (PNA) on Pd zeolites is an important technique to remove during the cold start of engine. However, stability under high concentrations CO still challenging in multiple starts Herein, we illustrate CO-induced degradation mechanism zeolite by combining experiments and kinetic models. Pd/SSZ-13 has been used multicycle processes containing at low temperature programmed desorption, which represents PNA periods. A model was developed describe storage behavior Pd/SSZ-13....

This study demonstrates a comparison of oxidation performance and sulfur poisoning/regeneration between zeolite- alumina-supported Pt catalysts for their use as diesel (DOC). All three Pt/zeolite (β, Y, ZSM-5) with high siliceous content (SiO2/Al2O3 = 211–243) prepared by incipient impregnation had an average size particles from 15 to 24 nm after degreening at 700 °C. The Pt/BEA catalyst not only outperformed the benchmark Pt/Al2O3 in terms conversion T50 (e.g., lower 13 72 °C CO C3H8,...

Pd-In2O3 catalysts are among the most promising alternatives to Cu-ZnO-Al2O3 for synthesis of CH3OH from CO2. However, intrinsic activity and stability In2O3 per unit mass should be increased reduce content this scarcely available element enhance catalyst lifetime. Herein, we propose demonstrate a strategy obtaining highly dispersed Pd nanoparticles onto an Al2O3 matrix by one-step coprecipitation followed calcination activation. The is comparable with that (0.52 vs. 0.55 gMeOH h-1 gcat-1 at...