Bulletin of Chemical Reaction Engineering and Catalysis最新文献_第5页

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Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-11-09 DOI: 10.1201/9781003046608-16

M. Schmal, J. Pinto

引用次数: 0

The Effect of Solvent-Modification on the Physicochemical Properties of ZnO Nanoparticles Synthesized by Sol-Gel Method 溶剂改性对溶胶-凝胶法制备ZnO纳米颗粒理化性质的影响

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-11-05 DOI: 10.9767/bcrec.17.1.12345.46-52

Z. Shnain, M. Toma, Basheer A. Abdulhussein, N. J. Saleh, M. Ibrahim, Nerran Manuel, Abbner Mahmood

{"title":"The Effect of Solvent-Modification on the Physicochemical Properties of ZnO Nanoparticles Synthesized by Sol-Gel Method","authors":"Z. Shnain, M. Toma, Basheer A. Abdulhussein, N. J. Saleh, M. Ibrahim, Nerran Manuel, Abbner Mahmood","doi":"10.9767/bcrec.17.1.12345.46-52","DOIUrl":"https://doi.org/10.9767/bcrec.17.1.12345.46-52","url":null,"abstract":"This study investigated the solvent effect on the synthesis of Zinc Oxide (ZnO) nanoparticle using sol-gel method. Zinc acetate dihydrate and oxalic acid were used as a chemical precursor for the synthesis of the ZnO nanoparticle considering the effects of various solvents. The effect of using water, propanol, or ethanol as solvent during the synthesis were examined. The resultant gel in the aqueous and organic moderate solvent was thermally cracked into ZnO nanoparticles at 450 °C under atmospheric pressure. The results showed that the solvent type has a significant effect on the morphology and particles size of the ZnO nanoparticles synthesized. Atomic Force Microscopy (AFM) was used to investigate the microstructure of the nanoparticles. The crystalline and chemical structure of the prepared ZnO nanoparticle were studied by X-ray diffraction (XRD) and Fourier Transform Infrared spectroscopy (FTIR). The average diameter of nano-size particles obtained for ethanol, propanol and water are 79.55 nm, 83.86 nm and 85.59 nm, respectively. ZnO particles showed higher degree of crystalline in water compared to other solvents under current investigation. 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":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45786817","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: 2

Complex Processing of Adsorbent Used in the Purification of Hydrogen-Containing Gas 含氢气体净化用吸附剂的复合处理

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-10-30 DOI: 10.9767/bcrec.17.1.12366.32-45

Sukhrob Ibodullaev, N. Isaeva, R.G. Khodjiev, E. Mirzaeva, D. Turdieva, Sh.T. Gulomov, Sh. I. Mamatkulov

{"title":"Complex Processing of Adsorbent Used in the Purification of Hydrogen-Containing Gas","authors":"Sukhrob Ibodullaev, N. Isaeva, R.G. Khodjiev, E. Mirzaeva, D. Turdieva, Sh.T. Gulomov, Sh. I. Mamatkulov","doi":"10.9767/bcrec.17.1.12366.32-45","DOIUrl":"https://doi.org/10.9767/bcrec.17.1.12366.32-45","url":null,"abstract":"The problems of processing spent adsorbents with a high concentration of chemisorbed chlorine-containing compounds for their reuse are studied in this article. The genesis of the phase composition and morphology at all technological stages of thermochemical regeneration of the spent adsorbent - Axstrap-860 by means of alkaline modification with a combined solution of sodium and potassium hydroxides has been tested by diffractometry and elemental analysis. The results show that the formation of a layer with an increased concentration of alkali metals in the form of the corresponding carbonates and NaOH on the surface of the granules and in the volume of sodium and potassium aluminates provides adsorption of HCl, which are slightly inferior to the fresh adsorbent. The conditions for the removal of halogen-containing substances from technogenic raw materials with the subsequent isolation of useful products have been optimized: (1) crystalline NaCl intended for the preparation of electrolyte for electrode boilers and steam generators; (2) a mixture of chlorides and hydroxochlorides of aluminum tested in the process of coagulation purification of turbid natural and waste waters; (3) pseudoboehmite for the production of an adsorbent-desiccant and the synthesis of magnesium-aluminum spinel using the technology of destruction-epitaxial transformation, and a promising carrier for catalysts for steam reforming of hydrocarbons. 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":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46765156","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

Activated Bledug Kuwu’s Clay as Adsorbent Potential for Synthetic Dye Adsorption: Kinetic and Thermodynamic Studies 活化Bledug Kuwu粘土作为合成染料吸附的吸附潜力:动力学和热力学研究

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-10-25 DOI: 10.9767/bcrec.17.1.12473.22-31

S. Lestari, M. Muflihah, R. Kusumawardani, M. Nurhadi, Yuniati Mangesa, Fathur Insani Ridho, Robbiatul Adawiyah, Pristiningtyas Ambarwati, Siti Rahma, S. Y. Lai, Hadi Nur

{"title":"Activated Bledug Kuwu’s Clay as Adsorbent Potential for Synthetic Dye Adsorption: Kinetic and Thermodynamic Studies","authors":"S. Lestari, M. Muflihah, R. Kusumawardani, M. Nurhadi, Yuniati Mangesa, Fathur Insani Ridho, Robbiatul Adawiyah, Pristiningtyas Ambarwati, Siti Rahma, S. Y. Lai, Hadi Nur","doi":"10.9767/bcrec.17.1.12473.22-31","DOIUrl":"https://doi.org/10.9767/bcrec.17.1.12473.22-31","url":null,"abstract":"Bledug Kuwu is one of the geological phenomena as a mud volcano that occurs in Kuwu, Purwodadi, Grobogan, Central Java, Indonesia. The evaluation of Bledug Kuwu’s clay as one of the adsorbents for synthetic dyes has been carried out. The preparation of the adsorbent started with washing the clay with distilled water, followed by activation with a solution of hydrochloric acid (1 M) under mechanistic stirring for overnight. The C−H and O−H groups found on the clay adsorbent could attract methylene blue by dispersion forces and hydrogen bonding. Hydrocloric acid activation process for clay can increase surface area from 49 to 70 m2.g−1, meanwhile, reducing the average crystal size from 48.3 to 43.4 nm. The dye removal capacity increased from 34 to 40 mg.g−1 in corresponding to the increase of the temperature from 30 to 50 °C. The results showed that the equilibrium adsorption capacity of activated Bledug Kuwu’s clay reached 99% in an adsorption time of 20 min. The kinetic models of methylene blue adsorption onto BKC and ABKC adsorbents follow the pseudo-second order and the adsorption process is spontaneous with free energy (ΔG) as −23.519 kJ.mol−1. 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":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44714462","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: 2

Sulfonated Mesoporous Silica-Carbon Composite Derived from a Silicate-Polyethylene Glycol Gel and Its Application as Solid Acid Catalysts 硅酸盐-聚乙二醇凝胶磺化中孔硅碳复合材料及其在固体酸催化剂中的应用

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-10-13 DOI: 10.9767/bcrec.17.1.11795.13-21

Shofiyya Julaika, Agus Farid Fadli, W. Widiyastuti, H. Setyawan

{"title":"Sulfonated Mesoporous Silica-Carbon Composite Derived from a Silicate-Polyethylene Glycol Gel and Its Application as Solid Acid Catalysts","authors":"Shofiyya Julaika, Agus Farid Fadli, W. Widiyastuti, H. Setyawan","doi":"10.9767/bcrec.17.1.11795.13-21","DOIUrl":"https://doi.org/10.9767/bcrec.17.1.11795.13-21","url":null,"abstract":"Solid acid catalyst is a promising alternative to the counterpart homogeneous acid for esterification reaction from the viewpoint of reusability and environmental concerns. This work aims to develop sulfonated mesoporous silica-carbon composite as solid acid catalyst for the esterification. The catalyst was synthesized from sodium silicate as the silica precursor and polyethylene glycol (PEG) as both carbon precursor and template via a sol-gel route in an aqueous system. Then, it was carbonized to produce mesoporous silica-carbon composite. Using the proposed method, the surface area of the silica-carbon composite could reach as high as 1074.21 m2/g. Although the surface area decreased to 614.02 m²/g when it was functionalized with sulfonate groups, the composite had a high ionic capacity of 5.3 mEq/g and exhibited high catalytic activity for esterification reaction of acetic acid with ethanol. At a reaction temperature of 80 °C, the acetic acid conversion reached 76.55% in 4 h. In addition, the catalyst had good reusability, which can be comparable with the commercial catalyst Foltrol F-007. It appears that the sulfonated silica-carbon composite prepared from sodium silicate using PEG as the carbon source a promising candidate as catalyst for esterification and the related area. 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":"1 1","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41727271","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

Catalytic Decomposition of Methane to Hydrogen over Al2O3 Supported Mono- and Bimetallic Catalysts Al2O3负载的单金属和双金属催化剂催化甲烷分解制氢

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-10-07 DOI: 10.9767/bcrec.17.1.12174.1-12

G. E. Ergazieva, N. Makayeva, Z. Shaimerden, S. Soloviev, Мoldir Telbayeva, Еrzhan Akkazin, Fariza Ahmetova

{"title":"Catalytic Decomposition of Methane to Hydrogen over Al2O3 Supported Mono- and Bimetallic Catalysts","authors":"G. E. Ergazieva, N. Makayeva, Z. Shaimerden, S. Soloviev, Мoldir Telbayeva, Еrzhan Akkazin, Fariza Ahmetova","doi":"10.9767/bcrec.17.1.12174.1-12","DOIUrl":"https://doi.org/10.9767/bcrec.17.1.12174.1-12","url":null,"abstract":"This article discusses the decomposition of methane in the temperature range 550–800 °C on low-percentage monometallic (Ni/g-Al2O3, Co/g-Al2O3) and bimetallic (Ni-Co/g-Al2O3) catalysts. It is shown that the bimetallic catalyst is more active in the decomposition of methane to hydrogen than monometallic ones. At a reaction temperature of 600 °C, the highest methane conversion is 81%, and the highest hydrogen yield of 51% is formed on Ni-Co/g-Al2O3. A complex of physicochemical methods (Scanning Electron Microscope (SEM), X-ray Diffraction (XRD), Temperature Programmed Reduction (TPR-H2), etc.) established that the addition of cobalt oxide to the composition of Ni/g-Al2O3 leads to the formation of surface bimetallic Ni-Co alloys, while the dispersion of particles increases and the reducibility of the catalyst is facilitated, which provides an increase in the concentration of metal particles - active centers, which can be the reason for an increase in the catalytic properties of a bimetallic catalyst in comparison with monometallic ones. 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":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45262540","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: 3

Preparation of NiFe2O4 Nanoparticles by Solution Combustion Method as Photocatalyst of Congo red 溶液燃烧法制备纳米NiFe2O4刚果红光催化剂

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Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-09-30 DOI: 10.9767/BCREC.16.3.10848.481-490

P. Hariani, M. Said, A. Rachmat, F. Riyanti, Handayani Citra Pratiwi, Widya Twiny Rizki

{"title":"Preparation of NiFe2O4 Nanoparticles by Solution Combustion Method as Photocatalyst of Congo red","authors":"P. Hariani, M. Said, A. Rachmat, F. Riyanti, Handayani Citra Pratiwi, Widya Twiny Rizki","doi":"10.9767/BCREC.16.3.10848.481-490","DOIUrl":"https://doi.org/10.9767/BCREC.16.3.10848.481-490","url":null,"abstract":"NiFe2O4 nanoparticles had been successfully synthesized by solution combustion method using urea fuel (organic precursor). The synthesized NiFe2O4 were characterized by X-ray diffraction (XRD), Scanning electron microscopy-Electron Dispersive X-ray Spectroscopy (SEM-EDs), Transmission Electron Microscopy (TEM), Fourier Transform Infra-Red (FTIR), Vibrating Sample Magnetometer (VSM), UV-Vis Diffuse Reflectance Spectroscopy (UV-Vis DRS), and Point of Zero Charge (pHpzc). NiFe2O4 nanoparticles irradiated with visible light were employed to degrade Congo red dye with the following variable: solution pH (3–8), H2O2 concentration (0.5–3 mM), and Congo red concentration (100–600 mg/L). XRD analysis results showed that the NiFe2O4 nanoparticles had a cubic spinel structure. The particle sizes are in the range of 10–40 nm. The magnetic properties of NiFe2O4 nanoparticles determined using VSM showed a magnetization saturation value of 47.32 emu/g. UV-Vis DRS analysis indicated that NiFe2O4 nanoparticles had an optical band gap of 1.97 eV. The success of synthesis was also proven by the EDS analysis results, which showed that the synthesized NiFe2O4 nanoparticles composed of Ni, Fe, and O elements. The removal efficiency of Congo red dye was 96.80% at the following optimum conditions: solution pH of 5.0, H2O2 concentration of 2 mM, Congo red dye concentration of 100 mg/L, and contact time of 60 min. The study of the photodegradation kinetics follows a pseudo-first order reaction with a rate constant value of 0.0853 min−1. 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":"481-490"},"PeriodicalIF":1.5,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48432504","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: 16

Ni Nanoparticles on Reducible Metal Oxides (Sm2O3, CeO2, ZnO) as Catalysts for CO2 Methanation 可还原金属氧化物（Sm2O3，CeO2，ZnO）上的Ni纳米粒子作为CO2甲烷化催化剂

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-09-30 DOI: 10.9767/BCREC.16.3.10948.641-650

Athirah Ayub, H. Bahruji, A. H. Mahadi

{"title":"Ni Nanoparticles on Reducible Metal Oxides (Sm2O3, CeO2, ZnO) as Catalysts for CO2 Methanation","authors":"Athirah Ayub, H. Bahruji, A. H. Mahadi","doi":"10.9767/BCREC.16.3.10948.641-650","DOIUrl":"https://doi.org/10.9767/BCREC.16.3.10948.641-650","url":null,"abstract":"The activity of reducible metal oxide Sm2O3, CeO2, and ZnO as Ni nanoparticles support was investigated for CO2 methanation reaction. CO2 methanation was carried out between 200 °C to 450 °C with the optimum catalytic activity was observed at 450 °C. The reducibility of the catalysts has been comparatively studied using H2-Temperature Reduction Temperature (TPR) method. The H2-TPR analysis also elucidated the formation of surface oxygen vacancies at temperature above 600 °C for 5Ni/Sm2O3 and 5Ni/CeO2. The Sm2O3 showed superior activity than CeO2 presumably due to the transition of the crystalline phases under reducing environment. However, the formation of NiZn alloy in 5Ni/ZnO reduced the ability of Ni to catalyze methanation reaction. A highly dispersed Ni on Sm2O3 created a large metal/support interfacial interaction to give 69% of CO2 conversion with 100% selectivity at 450 °C. The 5Ni/Sm2O3 exhibited superior catalytic performances with an apparent phase transition from cubic to a mixture of cubic and monoclinic phases over a long reaction, presumably responsible for the enhanced conversion after 10 h of reaction. 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":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42465510","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: 2

Effect of CTAB Ratio to the Characters of Mesoporous Silica Prepared from Rice Husk Ash in the Pyrolysis of a–cellulose CTAB比对稻壳灰热解制备中孔二氧化硅性能的影响

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-09-30 DOI: 10.9767/BCREC.16.3.10828.632-640

N. Wulandari, L. Efiyanti, W. Trisunaryanti, H. Oktaviano, Syaiful Bahri, Y. Ni'mah, S. Larasati

{"title":"Effect of CTAB Ratio to the Characters of Mesoporous Silica Prepared from Rice Husk Ash in the Pyrolysis of a–cellulose","authors":"N. Wulandari, L. Efiyanti, W. Trisunaryanti, H. Oktaviano, Syaiful Bahri, Y. Ni'mah, S. Larasati","doi":"10.9767/BCREC.16.3.10828.632-640","DOIUrl":"https://doi.org/10.9767/BCREC.16.3.10828.632-640","url":null,"abstract":"Due to its wide application, synthesizing silica through a cost-effective process becomes an attractive subject to be studied today. In this work, mesoporous silica (MS) was prepared from the highly available agricultural waste, rice husk ash (RHA), to be used as catalyst in the pyrolysis of a-cellulose. Silica was extracted from RHA through a reflux process in a strong base solution and arranged into a mesoporous structure by using cetyltrimethylammonium bromide (CTAB). To find a condition that produces a mesoporous support with the highest surface area and catalytic activity, the mole ratios of CTAB:SiO2 used during the preparation of MS were varied; 0.05:1; 0.1:1; 0.2:1. Afterwards, all prepared MS were characterized using Fourier Transform Infra Red (FTIR), Scanning Electron Microscope (SEM), and Surface Area Analyzer (SAA). Through he surface area analysis, it was found that MS materials possessed surface area, pore diameter, and pore volume that range from 600–970 m2.g−1, 3.5–4.7 nm, 0.7–1 cm3.g−1, respectively. The highest surface area, with over 970.80 m2.g−1, was obtained in MS support prepared by using CTAB:SiO2 mole ratio of 0.1:1. SEM images showed a coral reef-like surface morphology for all MS. In the pyrolysis of a-cellulose evaluated by Py-GCMS, aside from producing biofuel compounds, the use of MS was able to generate two-fold furan production, which is considered as a valuable compound in many chemical syntheses. This result highlights the potential of MS prepared from RHA to be used as a catalysis support material that is more economical for biofuel and other chemical production. 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":" ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45125940","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: 2

Biocatalytic Reduction of Formaldehyde to Methanol: Effect of pH on Enzyme Immobilization and Reactive Membrane Performance 甲醛生物催化还原制甲醇：pH对酶固定化和反应膜性能的影响

IF 1.5

Bulletin of Chemical Reaction Engineering and Catalysis Pub Date : 2021-09-30 DOI: 10.9767/BCREC.16.3.10568.472-480

N. A. Rahman, F. Marpani, N. Othman, N. Alias, J. Jai, N. R. Nik Him

{"title":"Biocatalytic Reduction of Formaldehyde to Methanol: Effect of pH on Enzyme Immobilization and Reactive Membrane Performance","authors":"N. A. Rahman, F. Marpani, N. Othman, N. Alias, J. Jai, N. R. Nik Him","doi":"10.9767/BCREC.16.3.10568.472-480","DOIUrl":"https://doi.org/10.9767/BCREC.16.3.10568.472-480","url":null,"abstract":"Thermodynamic stabled CO2 molecules can be biocatalytically reduced to methanol via three cascade dehydrogenases (formate, formaldehyde and alcohol) with the aid of cofactor as the electron donor. In this study, Alcohol dehydrogenase (EC 1.1.1.1), the third step of the cascade enzymatic reaction which catalyzed formaldehyde (CHOH) to methanol (CH3OH) will be immobilized in an ultrafiltration membrane. The enzyme will be immobilized in the support layer of a poly(ether)sulfone (PES) membrane via a technique called fouling induced enzyme immobilization. The objective of this study is to evaluate the effect of varying pH (acid (pH 5), neutral (pH 7) and alkaline (pH 9)) of the feed solution during immobilization process of ADH in the membrane in terms of permeate flux, observed rejection, enzyme loading and fouling mechanism. The experiment was conducted in a pressure driven, dead-end stirred filtration cell. Reaction conversion and biocatalytic productivity will be also evaluated. The results showed that permeate flux for acid solution were the lowest during immobilization. High concentration polarization and fouling resistance cause lower observed rejection for pH 7 and 9. Enzyme loading for pH 5 give 73.8% loading rate which is the highest compared to 62.4% at pH 7 and 70.1% at pH 9. Meanwhile, the conversion rate during the reaction shows that reaction on fouled membrane showed more than 90% conversion for pH 5 and 7. The fouling model predicted that irreversible fouling occurs during enzyme immobilization at pH 7 with standard blocking mechanism while reversible fouling occurs at pH 5 and 9 with intermediate and complete blocking, respectively. 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":"472-480"},"PeriodicalIF":1.5,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44675118","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: 2