Bulletin of Chemical Reaction Engineering and Catalysis最新文献_第10页

Activity Enhancement of P25 Titanium Dioxide by Zinc Oxide for Photocatalytic Phenol Degradation 氧化锌增强P25二氧化钛光催化降解苯酚的活性

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-06-30 DOI: 10.9767/BCREC.16.2.10319.310-319

Y. S. Kurniawan, L. Yuliati

{"title":"Activity Enhancement of P25 Titanium Dioxide by Zinc Oxide for Photocatalytic Phenol Degradation","authors":"Y. S. Kurniawan, L. Yuliati","doi":"10.9767/BCREC.16.2.10319.310-319","DOIUrl":"https://doi.org/10.9767/BCREC.16.2.10319.310-319","url":null,"abstract":"As a benchmark photocatalyst, P25 titanium dioxide (TiO2) nanomaterial has been widely reported for its remarkable photocatalytic activity under ultraviolet (UV) irradiation. However, approaches to further improve the photocatalytic activity of the P25 TiO2 are still required. In the present work, we reported the activity enhancement of the P25 TiO2 up to more than five times higher rate constant for phenol degradation when the P25 TiO2 was coupled with zinc oxide (ZnO). The composites were prepared by a physical mixing method of P25 TiO2 and ZnO with various weight ratios of 1:0.5, 1:1, and 1:2. The composite materials were then characterized using X-ray diffraction (XRD), diffuse-reflectance ultraviolet-visible (DR UV-vis), Fourier transform infrared (FTIR), and fluorescence spectroscopies. All the composites gave better activity than the P25 TiO2, in which the TiO2/ZnO 1:1 composite material exhibited the highest first-order reaction rate constant (0.43 h−1). This remarkable enhanced degradation rate was much higher than that of the unmodified TiO2 (0.08 h−1) and ZnO (0.13 h-1). The fluorescence study revealed that the electron-hole recombination on the P25 TiO2 could be suppressed by the ZnO, which would be the reason for such activity enhancement. A study on the effect of the scavenger showed that the hydroxyl radicals played a crucial role in the photocatalytic phenol degradation. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). ","PeriodicalId":46276,"journal":{"name":"Bulletin of Chemical Reaction Engineering and Catalysis","volume":"16 1","pages":"310-319"},"PeriodicalIF":1.5,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44679700","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Crystal Structure and Catalytic Activity of Poly[bis(3-bromo-2-hydroxybenzaldehyde)-2-aminopyrimidinemagnesium(II)] for Hydrogenation of 1,3-Butadiene 聚双(3-溴-2-羟基苯甲醛)-2-氨基嘧啶镁(II)的晶体结构及对1,3-丁二烯加氢的催化活性

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-06-30 DOI: 10.9767/BCREC.16.2.10421.260-266

Lihua Wang, F. Kong, X. Tai

{"title":"Crystal Structure and Catalytic Activity of Poly[bis(3-bromo-2-hydroxybenzaldehyde)-2-aminopyrimidinemagnesium(II)] for Hydrogenation of 1,3-Butadiene","authors":"Lihua Wang, F. Kong, X. Tai","doi":"10.9767/BCREC.16.2.10421.260-266","DOIUrl":"https://doi.org/10.9767/BCREC.16.2.10421.260-266","url":null,"abstract":"A new six-coordinated Mn(II) coordination polymer, [Mn(L1)(L2)2]n (L1 = 2-aminopyrimidine, HL2 = 3-bromo-2hydroxybenzaldehyde) was synthesized by 3-bromo-2-hydroxybenzaldehyde, NaOH, 2-aminopyrimidine and manganese(II) acetate dihydrate. The Mn(II) coordination polymer was structural characterized by elemental analysis and single crystal X-ray diffraction. The results show that each Mn(II) ion is six-coordinated with two phenolic hydroxyl O atoms from two 3-bromo-2-hydroxybenzaldehyde ligands (O1 and O4), two formyl group O atoms from two 3-bromo-2-hydroxybenzaldehyde ligands (O2 and O3), and two N atoms from two 2-aminopyrimidine molecules (N1A and N2), and forms a distorted octahedral coordination geometry. The Mn(II) coordination polymer displays a 1D chained structure by the bridge effect of 2-aminopyrimidine N atoms. The catalytic activities of Mn(II) coordination polymer and Pd@Mn(II) coordination polymer for hydrogenation of 1,3-butadiene have been investigated. The Pd@Mn(II) coordination polymer catalyst shows the good catalytic activity and selectivity in the hydrogenation of 1,3-butadiene. The 1,3-butadiene conversion is 61.3% at 70 °C, and the selectivity to total butene is close to 100%. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).","PeriodicalId":46276,"journal":{"name":"Bulletin of Chemical Reaction Engineering and Catalysis","volume":"16 1","pages":"260-266"},"PeriodicalIF":1.5,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44520902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Role of Microalgae as a Source for Biofuel Production in the Future: A Short Review 微藻作为未来生物燃料生产来源的作用：简评

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-06-30 DOI: 10.9767/BCREC.16.2.10503.396-412

Mustafa Jawad Nuhma, H. Alias, Ali A. Jazie, Muhammad Tahir

{"title":"Role of Microalgae as a Source for Biofuel Production in the Future: A Short Review","authors":"Mustafa Jawad Nuhma, H. Alias, Ali A. Jazie, Muhammad Tahir","doi":"10.9767/BCREC.16.2.10503.396-412","DOIUrl":"https://doi.org/10.9767/BCREC.16.2.10503.396-412","url":null,"abstract":"The continued burning of fossil fuels since the beginning of the last century led to higher emissions of greenhouse gases and thus leads to global warming. Microalgae are one of the most important sources of green hydrocarbons because this type of algae has a high percentage of lipids and has rapid growth, consumes the carbon dioxide in large quantities. Besides, the cultivation of these types of algae does not require arable land. This review aims to explain the suitability of microalgae as a biofuel source depending on the fat content, morphology, and other parameters and their effect on the conversion processes of microalgae oil into biofuels by different zeolite catalytic reactions. It also discusses in detail the major chemical processes that convert microalgae oil to chemical products. This review sheds light on one of the most important groups of microalgae (Chlorella vulgaris microalgae). This review includes a historical overview and a comprehensive description of the structure needed to develop this type of algae. The most important methods of production, their advantages and disadvantages are also deliberated in this work. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). ","PeriodicalId":46276,"journal":{"name":"Bulletin of Chemical Reaction Engineering and Catalysis","volume":"16 1","pages":"396-412"},"PeriodicalIF":1.5,"publicationDate":"2021-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47975121","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Reaction Kinetics of Levulinic Acid Synthesis from Glucose Using Bronsted Acid Catalyst Bronsted酸催化葡萄糖合成乙酰丙酸的反应动力学

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-06-21 DOI: 10.21203/rs.3.rs-609706/v1

M. E. Toif, M. Hidayat, R. Rochmadi, A. Budiman

{"title":"Reaction Kinetics of Levulinic Acid Synthesis from Glucose Using Bronsted Acid Catalyst","authors":"M. E. Toif, M. Hidayat, R. Rochmadi, A. Budiman","doi":"10.21203/rs.3.rs-609706/v1","DOIUrl":"https://doi.org/10.21203/rs.3.rs-609706/v1","url":null,"abstract":"\u0000 Glucose is the primary derivative of lignocellulosic biomass, which is abundantly available. Glucose has excellent potential to be converted into valuable compounds such as ethanol, sorbitol, gluconic acid, and levulinic acid (LA). Levulinic acid is a very promising green platform chemical. It is composed of two functional groups, ketone and carboxylate groups which can act as highly reactive electrophiles for nucleophilic attack so it has extensive applications, including fuel additives, raw materials for the pharmaceutical industry, and cosmetics. The reaction kinetics of LA synthesis from glucose using hydrochloric acid catalyst (bronsted acid) were studied in a wide range of operating conditions, i.e., temperature of 140-180 oC, catalyst concentration of 0.5-1.5 M, and initial glucose concentration of 0.1-0.5 M. The highest LA yield is 48.34 %wt at 0.1 M initial glucose concentration, 1 M HCl, and temperature of 180 oC. The experimental results show that the bronsted acid catalyst's reaction pathway consists of glucose decomposition to levoglucosan (LG), conversion of LG to 5-hydroxymethylfurfural (HMF), and rehydration of HMF to LA. The experimental data yields a good fitting by assuming a first-order reaction model.","PeriodicalId":46276,"journal":{"name":"Bulletin of Chemical Reaction Engineering and Catalysis","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47288425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Catalytic Performance of Calcium-Lanthanum co-doped Ceria (Ce0.85-xLa0.15CaxO2-δ) in Partial Oxidation of Methane 钙镧共掺铈(Ce0.85-xLa0.15CaxO2-δ)在甲烷部分氧化中的催化性能

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-05-17 DOI: 10.9767/bcrec.16.3.10528.548-554

Qassam Sarmad, U. M. Khan, M. Anwar, A. H. Khoja, M. Ali, Z. Khan, A. Muchtar, M. R. Somalu

引用次数: 1

Modelling Based Analysis and Optimization of Simultaneous Saccharification and Fermentation for the Production of Lignocellulosic-Based Xylitol 木质纤维素基木糖醇同时糖化发酵的建模分析与优化

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-05-11 DOI: 10.9767/BCREC.16.4.11807.857-868

I. M. Hidayatullah, T. Setiadi, M. Kresnowati

{"title":"Modelling Based Analysis and Optimization of Simultaneous Saccharification and Fermentation for the Production of Lignocellulosic-Based Xylitol","authors":"I. M. Hidayatullah, T. Setiadi, M. Kresnowati","doi":"10.9767/BCREC.16.4.11807.857-868","DOIUrl":"https://doi.org/10.9767/BCREC.16.4.11807.857-868","url":null,"abstract":"\u0000 Simultaneous saccharification and fermentation (SSF) configuration offers an efficient used of the reactor. In this configuration, both the hydrolysis and fermentation processes are conducted simultaneously in a single bioreactor and the overall process may be accelerated. Problems may arise if both processes have different optimum conditions, and therefore process optimization is required. This paper presents the development of mathematical model over SSF strategy implementation for producing xylitol from hemicellulose component of lignocellulosic materials. The model comprises of the hydrolysis of hemicellulose and the fermentation of hydrolysate into xylitol. The model was simulated for various process temperature, prior hydrolysis time, and inoculum concentration. Simulation of the developed kinetics model shows that the optimum SSF temperature is 36oC, whereas conducting a prior hydrolysis at its optimum hydrolysis temperature will further shorten the processing time and increase the xylitol productivity. On the other hand, increasing the inoculum size will shorten the processing time further. For an initial xylan concentration of 100 g/L, the best condition is obtained by performing 21-hour prior hydrolysis at 60oC, followed by SSF at 36oC by adding 2.0 g/L inoculum, giving 46.27 g/L xylitol within 77 hours of total processing time.","PeriodicalId":46276,"journal":{"name":"Bulletin of Chemical Reaction Engineering and Catalysis","volume":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49179417","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Promotion Effect of Cu on the Pd/C Catalyst in the Chemoselective Hydrogenation of Unsaturated Carbonyl Compounds Cu对Pd/C催化剂在不饱和羰基化合物化学选择性加氢反应中的促进作用

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-04-29 DOI: 10.9767/BCREC.16.2.10398.267-279

K. Mustikasari, Rodiansono Rodiansono, M. Astuti, S. Husain, S. Sutomo

{"title":"The Promotion Effect of Cu on the Pd/C Catalyst in the Chemoselective Hydrogenation of Unsaturated Carbonyl Compounds","authors":"K. Mustikasari, Rodiansono Rodiansono, M. Astuti, S. Husain, S. Sutomo","doi":"10.9767/BCREC.16.2.10398.267-279","DOIUrl":"https://doi.org/10.9767/BCREC.16.2.10398.267-279","url":null,"abstract":"Highly efficient and selective hydrogenation of a,b-unsaturated carbonyl compounds to unsaturated alcohol using bimetallic palladium-copper supported on carbon (denoted as Pd-Cu(3.0)/C; 3.0 is Pd/Cu molar ratio) catalyst is demonstrated. Pd-Cu(3.0)/C catalyst was prepared via a simple hydrothermal route under air atmosphere at 150 °C for 24 h followed by reduction with hydrogen at 400°C for 1.5 h. The chemoselective hydrogenation of typical a,b-unsaturated carbonyl ketone (2-cyclohexene-1-one) and aldehyde (trans-2-hexenaldehyde), and chemoselective hydrogenation of FFald and (E)-non-3-en-2-one mixture demonstrated high productivity, leading to high selectivity of unsaturated alcohols. The presence of bimetallic Pd-Cu alloy phase with relatively high H2 uptakes was observed, enabling to preferentially hydrogenate C=O rather than to C=C bonds under mild reaction conditions. Pd-Cu(3.0)/C catalyst was found to stable and reusable for at least four reaction runs and the activity and selectivity of the catalyst can be restored to the original after rejuvenation with H2 at 400 °C for 1.5 h. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0). ","PeriodicalId":46276,"journal":{"name":"Bulletin of Chemical Reaction Engineering and Catalysis","volume":"16 1","pages":"267-279"},"PeriodicalIF":1.5,"publicationDate":"2021-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46083482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The Influence of Metal Loading Amount on Ni/Mesoporous Silica Extracted from Lapindo Mud Templated by CTAB for Conversion of Waste Cooking Oil into Biofuel 金属负载量对用CTAB模板法从废弃食用油转化为生物燃料的Lapindo泥中提取Ni/中孔二氧化硅的影响

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-03-31 DOI: 10.9767/BCREC.16.1.9442.22-30

C. Paramesti, W. Trisunaryanti, S. Larasati, N. Santoso, S. Sudiono, T. Triyono, D. A. Fatmawati

{"title":"The Influence of Metal Loading Amount on Ni/Mesoporous Silica Extracted from Lapindo Mud Templated by CTAB for Conversion of Waste Cooking Oil into Biofuel","authors":"C. Paramesti, W. Trisunaryanti, S. Larasati, N. Santoso, S. Sudiono, T. Triyono, D. A. Fatmawati","doi":"10.9767/BCREC.16.1.9442.22-30","DOIUrl":"https://doi.org/10.9767/BCREC.16.1.9442.22-30","url":null,"abstract":"The synthesis and characterization of Ni/mesoporous silica (Ni/MS) catalysts from Lapindo mud with various metal loading for the hydrocracking of waste cooking oil into biofuel has been conducted. The MS was synthesized by the hydrothermal method using CTAB as a template. The nickel-metal of 4, 6, and 8 wt% was loaded into the MS using salt precursors of Ni(NO3)2.6H2O via wet impregnation, produced the Ni(4)/MS, Ni(6)/MS, and Ni(8)/MS catalysts, respectively. The materials produced were then characterized by X-ray Powder Diffraction (XRD), FourierTransform Infrared Spectroscopy (FT-IR), and Surface Area Analyzer (SAA), and Absorption Atomic Spectrophotometry (AAS). The catalytic activity test was carried out for hydrocracking of waste cooking oil and the resulted liquid product was analyzed by Gas Chromatography-Mass Spectrometry (GC-MS). The results showed that the specific surface area of Ni(4)/MS, Ni(6)/MS, and Ni(8)/MS catalysts are 63.08, 91.45, and 120.45 m2/g, respectively. The liquid products of the hydrocracking using Ni(4)/MS, Ni(6)/MS, and Ni(8)/MS catalysts were 80.57, 74.63, and 75.77 wt%, where the total biofuel produced was 55.46, 50.93, and 54.05 wt%, respectively. Based on these results, Ni(4)/MS material was successfully used as the most potent catalyst in the hydrocracking of waste cooking oil into","PeriodicalId":46276,"journal":{"name":"Bulletin of Chemical Reaction Engineering and Catalysis","volume":"16 1","pages":"22-30"},"PeriodicalIF":1.5,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41906367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Effect of Calcination Temperature on the Photocatalytic Activity of Zn2Ti3O8 Materials for Phenol Photodegradation 煅烧温度对Zn2Ti3O8光催化降解苯酚活性的影响

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-03-31 DOI: 10.9767/BCREC.16.1.10322.196-204

K. T. A. Priyangga, Y. S. Kurniawan, L. Yuliati

{"title":"Effect of Calcination Temperature on the Photocatalytic Activity of Zn2Ti3O8 Materials for Phenol Photodegradation","authors":"K. T. A. Priyangga, Y. S. Kurniawan, L. Yuliati","doi":"10.9767/BCREC.16.1.10322.196-204","DOIUrl":"https://doi.org/10.9767/BCREC.16.1.10322.196-204","url":null,"abstract":"Zinc titanate (Zn2Ti3O8) is a bimetal oxide material that is especially attractive as a photocatalyst. In the preparation of the Zn2Ti3O8, the calcination temperature is a crucial parameter. Hence, in the present work, we aimed to synthesize the Zn2Ti3O8 materials from zinc(II) nitrate and titanium(IV) isopropoxide as precursors by using a sol-gel method and followed by calcination at 700, 900, and 1100 °C to give ZT-700, ZT-900, and ZT-100 materials, respectively. The ZT materials were characterized using Fourier transform infrared (FTIR), diffuse reflectance ultraviolet-visible (DR UV-vis), and fluorescence spectroscopies. It was confirmed that the ZT materials contained O−Ti−O, Zn−O−Ti, Zn−O, Ti−O−Ti, and Ti−O functional groups as shown from their FTIR spectra. Similar fluorescence properties were only observed on the ZT-700 and ZT-900. From the bandgap energy analysis, ZT-700 and ZT-900 contained spinel and cubic Zn2Ti3O8 (spl-Zn2Ti3O8 and c-Zn2Ti3O8) crystal phases), while ZT-1100 contained c-Zn2TiO4 and TiO2 rutile crystal phases. The kinetic analysis of photocatalytic phenol degradation showed that both ZT-700 and ZT-900 materials exhibited high photocatalytic activity with the reaction rate constants of 0.0353 and 0.0355 h−1, respectively. These values were higher than that of the ZT-1100 (0.0206 h−1). This study demonstrated that calcination at 700 and 900 °C resulted in the formation of the spl-Zn2Ti3O8 and c-Zn2Ti3O8 phases, which were effective as the photocatalyst, but the formation of c-Zn2TiO4 and rutile TiO2 at calcination of 1100 °C deteriorated the photocatalytic activity. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).","PeriodicalId":46276,"journal":{"name":"Bulletin of Chemical Reaction Engineering and Catalysis","volume":"16 1","pages":"196-204"},"PeriodicalIF":1.5,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43850036","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Highly Selective Au/ZnO via Colloidal Deposition for CO2 Hydrogenation to Methanol: Evidence of AuZn Role 胶体沉积高选择性Au/ZnO用于CO2加氢制甲醇：AuZn作用的证据

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-03-31 DOI: 10.9767/BCREC.16.1.9375.44-51

H. Bahruji, Mshaal Almalki, N. Abdullah

{"title":"Highly Selective Au/ZnO via Colloidal Deposition for CO2 Hydrogenation to Methanol: Evidence of AuZn Role","authors":"H. Bahruji, Mshaal Almalki, N. Abdullah","doi":"10.9767/BCREC.16.1.9375.44-51","DOIUrl":"https://doi.org/10.9767/BCREC.16.1.9375.44-51","url":null,"abstract":"Gold, Au nanoparticles were deposited on ZnO, Al2O3, and Ga2O3 via colloidal method in order to investigate the role of support for CO2 hydrogenation to methanol. Au/ZnO was also produced using impregnation method to investigate the effect of colloidal method to improve methanol selectivity. Au/ZnO produced via sol immobilization showed high selectivity towards methanol meanwhile impregnation method produced Au/ZnO catalyst with high selectivity towards CO. The CO2 conversion was also influenced by the amount of Au weight loading. Au nanoparticles with average diameter of 3.5 nm exhibited 4% of CO2 conversion with 72% of methanol selectivity at 250 °C and 20 bar. The formation of AuZn alloy was identified as active sites for selective CO2 hydrogenation to methanol. Segregation of Zn from ZnO to form AuZn alloy increased the number of surface oxygen vacancy for CO2 adsorption to form formate intermediates. The formate was stabilized on AuZn alloy for further hydrogenation to form methanol. The use of Al2O3 and Ga2O3 inhibited the formation of Au alloy, and therefore reduced methanol production. Au/Al2O3 showed 77% selectivity to methane, meanwhile Au/Ga2O3 produced 100% selectivity towards CO. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).","PeriodicalId":46276,"journal":{"name":"Bulletin of Chemical Reaction Engineering and Catalysis","volume":"16 1","pages":"44-51"},"PeriodicalIF":1.5,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47050320","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0