PubAg

Main content area

You searched for: Journal ACS sustainable chemistry Remove constraint Journal: ACS sustainable chemistry Subject sulfuric acid Remove constraint Subject: sulfuric acid Subject temperature Remove constraint Subject: temperature Text Availability Citation in PubAg Remove constraint Text Availability: Citation in PubAg
Start Over

Search

23  Search Results

1 - 23 of 23
Number of results to display per page

Search Results

1. Ecopolyol Production from Industrial Cork Powder via Acid Liquefaction Using Polyhydric Alcohols

Author:
Soares, Belinda; Gama, Nuno; Freire, Carmen; Barros-Timmons, Ana; Brandão, Inês; Silva, Rui; Pascoal Neto, Carlos; Ferreira, Artur
Source:
ACS sustainable chemistry 2014 v.2 no.4 pp. 846-854
ISSN:
2168-0485
Subject:
atmospheric pressure; catalysts; cork; experimental design; foams; glycerol; industry; liquefaction; polyurethanes; solvents; sulfuric acid; temperature; viscosity
Abstract:
... Ecopolyol production from acid liquefaction of cork powder was studied for the first time using PEG 400 and glycerol as liquefaction solvents in the presence of sulfuric acid at moderate temperature and atmospheric pressure. The effect of the temperature, concentration of catalyst, and time on the liquefaction yield has been investigated using a fixed set of reaction conditions namely, a liquefact ...
DOI:
10.1021/sc400488c

2. Opuntiol: An Active Principle of Opuntia elatior as an Eco-Friendly Inhibitor of Corrosion of Mild Steel in Acid Medium

Author:
Loganayagi, C.; Kamal, C.; Sethuraman, M. G.
Source:
ACS sustainable chemistry 2014 v.2 no.4 pp. 606-613
ISSN:
2168-0485
Subject:
Opuntia; X-ray diffraction; adsorption; corrosion; dielectric spectroscopy; electrochemistry; fruit extracts; hydrochloric acid; nuclear magnetic resonance spectroscopy; scanning electron microscopes; scanning electron microscopy; sorption isotherms; spectral analysis; steel; sulfuric acid; temperature; weight loss
Abstract:
... The anticorrosion ability of Opuntia elatior fruit extract was tested on mild steel (MS) in 1 M HCl and H₂SO₄ media by a weight loss method at various temperatures, electrochemical experiments such as potentiodynamic polarization (PDS) and electrochemical impedance spectroscopy (EIS), and surface characterization techniques using scanning electron microscope (SEM) and X-ray diffraction (XRD) studi ...
DOI:
10.1021/sc4003642

3. Evaluation of Clean Fractionation Pretreatment for the Production of Renewable Fuels and Chemicals from Corn Stover

Author:
Katahira, Rui; Mittal, Ashutosh; McKinney, Kellene; Ciesielski, Peter N.; Donohoe, Bryon S.; Black, Stuart K.; Johnson, David K.; Biddy, Mary J.; Beckham, Gregg T.
Source:
ACS sustainable chemistry 2014 v.2 no.6 pp. 1364-1376
ISSN:
2168-0485
Subject:
acetone; temperature; fractionation; lignocellulose; renewable energy sources; molecular weight; biopolymers; sulfuric acid; catalysts; solvents; corn stover; analytical methods; feedstocks; biomass; ethanol; industrial applications
Abstract:
... Organosolv fractionation processes aim to separate the primary biopolymers in lignocellulosic biomass to enable more selective deconstruction and upgrading approaches for the isolated components. Clean fractionation (CF) is a particularly effective organsolv process that was originally applied to woody feedstocks. The original CF pretreatment employed methyl isobutyl ketone (MIBK), ethanol, and wa ...
DOI:
10.1021/sc5001258

4. Synthesis of Soy-Polyols Using a Continuous Microflow System and Preparation of Soy-based Polyurethane Rigid Foams

Author:
Ji, Dong; Fang, Zheng; He, Wei; Zhang, Kai; Luo, Zhenyang; Wang, Tingwei; Guo, Kai
Source:
ACS sustainable chemistry 2015 v.3 no.6 pp. 1197-1204
ISSN:
2168-0485
Subject:
Fourier transform infrared spectroscopy; compression strength; crosslinking; dimensional stability; foams; gel chromatography; hydroxylation; insulating materials; molecular weight; oligomerization; polyurethanes; raw materials; separators; soybean oil; sulfuric acid; temperature; thermal stability; viscosity
Abstract:
... A soy-polyol labeled Polyol-m was synthesized directly from soybean oil in a continuous microflow system equipped with self-designed oil–water separators and using a reported scheme for epoxidation under following the optimized conditions for hydroxylation: sulfuric acid concentration of 10 wt %, residence time of 13 min, and temperature of 75 °C. Another soy-polyol labeled Polyol-f was also synth ...
DOI:
10.1021/acssuschemeng.5b00170

5. Microwave Assisted Acid Hydrolysis of Brown Seaweed Ascophyllum nodosum for Bioethanol Production and Characterization of Alga Residue

Author:
Yuan, Yuan; Macquarrie, Duncan J.
Source:
ACS sustainable chemistry 2015 v.3 no.7 pp. 1359-1365
ISSN:
2168-0485
Subject:
Ascophyllum nodosum; acid hydrolysis; biochar; bioethanol; biomass; energy; ethanol; ethanol production; feedstocks; fermentation; furfural; galactose; glucose; hydrolysates; macroalgae; mannose; microwave treatment; saccharification; sulfuric acid; temperature
Abstract:
... For the first time, brown seaweed Ascophyllum nodosum was studied as a feedstock for the production of bioethanol. Saccharification was carried out by microwave assisted acid hydrolysis. The optimal condition was 0.4 M H₂SO₄, 3.13% (w/v) of biomass concentration, reaction temperature at 150 °C for 1 min, resulting in 127 mg/g monosaccharides of seaweed being released. The hydrolysates solution was ...
DOI:
10.1021/acssuschemeng.5b00094

6. Recycling Indium from Scraped Glass of Liquid Crystal Display: Process Optimizing and Mechanism Exploring

Author:
Zeng, Xianlai; Wang, Fang; Sun, Xiaofei; Li, Jinhui
Source:
ACS sustainable chemistry 2015 v.3 no.7 pp. 1306-1312
ISSN:
2168-0485
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; energy-dispersive X-ray analysis; environmental protection; glass; indium; industry; leaching; liquid crystal display; raw materials; recycling; scanning electron microscopy; sulfuric acid; sustainable development; temperature; wastes
Abstract:
... With rapid growth in the use of liquid crystal display (LCD) and increasing concerns for environmental protection as well as conservation of scarce metals such as indium, the recycling of indium from waste LCDs is becoming a hot issue for current society. In this study, the leaching process for indium and exploration of its mechanism were carried out with full consideration of potential theory and ...
DOI:
10.1021/acssuschemeng.5b00020

7. Kinetic Modeling of Switchgrass-Derived Xylose Oligomers Degradation during Pretreatment in Dilute Acid or in Water

Author:
Lau, Ching-Shuan; Bunnell, Kris; Carrier, Danielle Julie
Source:
ACS sustainable chemistry 2015 v.3 no.9 pp. 2030-2035
ISSN:
2168-0485
Subject:
Panicum virgatum; enzymatic hydrolysis; fermentation; formic acid; furfural; hemicellulose; manufacturing; models; sulfuric acid; temperature; xylose
Abstract:
... Switchgrass hemicellulose can be converted into sugars, such as xylose, for biobased product manufacturing. However, during pretreatment, the hemicellulose can also be converted into xylose oligomers, furfural and formic acid, which are detrimental to subsequent enzymatic hydrolysis and fermentation. Pretreatment conditions that maximize xylose production from hemicellulose, while also minimizing ...
DOI:
10.1021/acssuschemeng.5b00298

8. Meso/Macroporous Silica from Miscanthus, Cereal Remnant Pellets, and Wheat Straw

Author:
Ahmad Alyosef, Hallah; Schneider, Denise; Wassersleben, Susan; Roggendorf, Hans; Weiß, Michael; Eilert, André; Denecke, Reinhard; Hartmann, Ingo; Enke, Dirk
Source:
ACS sustainable chemistry 2015 v.3 no.9 pp. 2012-2021
ISSN:
2168-0485
Subject:
Miscanthus; X-radiation; X-ray diffraction; adsorption; agricultural wastes; biomass; carbon; combustion; drying; energy crops; fluorescence; furnaces; heat treatment; macropores; mercury; microstructure; nitrogen; organic compounds; pellets; porous media; scanning electron microscopy; silica; sulfuric acid; temperature; thermal analysis; washing; wheat straw
Abstract:
... In the present study, the possibility of extracting biogenic silica from various European biomass materials was investigated. High-purity biogenic silica (>90 wt % SiO₂) was obtained from energy crops (miscanthus), agro wastes (wheat straw), and other crop residues (cereal remnant pellets). Three different morphological forms of biogenic silica materials (ash) were obtained by a thermo-chemical tr ...
DOI:
10.1021/acssuschemeng.5b00275

9. Experimental and Kinetic Modeling Studies on the Sulfuric Acid Catalyzed Conversion of d-Fructose to 5-Hydroxymethylfurfural and Levulinic Acid in Water

Author:
Fachri, Boy A.; Abdilla, Ria M.; Bovenkamp, Henk H. van de; Rasrendra, Carolus B.; Heeres, Hero J.
Source:
ACS sustainable chemistry 2015 v.3 no.12 pp. 3024-3034
ISSN:
2168-0485
Subject:
byproducts; catalysts; fructose; glucose; hydroxymethylfurfural; kinetics; levulinic acid; models; sulfuric acid; temperature
Abstract:
... Levulinic acid (LA) and 5-hydroxymethylfurfural (HMF) have been identified as promising biomass-derived platform chemicals. A kinetic study on the conversion of d-fructose to HMF and LA in water using sulfuric acid as the catalyst has been performed in batch setups. The experiments were carried out in a temperature window of 140–180 °C, using sulfuric acid as the catalyst (0.005–1 M) and an initia ...
DOI:
10.1021/acssuschemeng.5b00023

10. Physiochemical Characterization of Lignocellulosic Biomass Dissolution by Flowthrough Pretreatment

Author:
Yan, Lishi; Pu, Yunqiao; Bowden, Mark; Ragauskas, Arthur J.; Yang, Bin
Source:
ACS sustainable chemistry 2016 v.4 no.1 pp. 219-227
ISSN:
2168-0485
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; biofuels; biomass; cellulose; depolymerization; fuel production; ion exchange chromatography; lignin; lignocellulose; nuclear magnetic resonance spectroscopy; slurries; solubilization; stable isotopes; sugars; sulfuric acid; temperature; wood
Abstract:
... Comprehensive understanding of biomass solubilization chemistry in aqueous pretreatment such as water-only and dilute acid flowthrough pretreatment is of fundamental importance to achieve the goal of valorizing biomass to fermentable sugars and lignin for biofuels production. In this study, poplar wood was flowthrough pretreated by water-only or 0.05% (w/w) sulfuric acid at different temperatures ...
DOI:
10.1021/acssuschemeng.5b01021

11. Effects of Dilute Acid Pretreatment Parameters on Sugar Production during Biochemical Conversion of Switchgrass Using a Full Factorial Design

Author:
Djioleu, Angele; Carrier, Danielle Julie
Source:
ACS sustainable chemistry 2016 v.4 no.8 pp. 4124-4130
ISSN:
2168-0485
Subject:
Panicum virgatum; digestibility; fuels; glucans; glucose; sulfuric acid; temperature; xylose
Abstract:
... Pretreatment is an important unit operation in the production of cellulosic fuels because it governs the efficiency of the overall conversion process. The effect of dilute acid pretreatment parameters on prehydrolyzate xylose and glucose concentrations, as well as on glucan content and digestibility of pretreated switchgrass, was determined using a full factorial design. Temperature varied from 14 ...
DOI:
10.1021/acssuschemeng.6b00441

12. LignoForce System for the Recovery of Lignin from Black Liquor: Feedstock Options, Odor Profile, and Product Characterization

Author:
Kouisni, Lamfeddal; Gagné, Alain; Maki, Kirsten; Holt-Hindle, Peter; Paleologou, Michael
Source:
ACS sustainable chemistry 2016 v.4 no.10 pp. 5152-5159
ISSN:
2168-0485
Subject:
Eucalyptus; carbon dioxide; coagulation; dimethyl disulfide; dimethyl sulfide; feedstocks; filtration; hardwood; human health; hydrogen sulfide; lignin; methanethiol; odors; oxidation; pH; slurries; softwood; sulfur; sulfuric acid; temperature; washing; waste liquors
Abstract:
... Lignin can be precipitated from kraft black liquor (BL) through the addition of an acidifying agent such as carbon dioxide or sulfuric acid. In most of the existing lignin precipitation processes that are using acid addition, sufficient acid is added to drop the pH of the black liquor from about 13–14 to about 9–10, followed by lignin particle coagulation, lignin slurry filtration, and lignin cake ...
DOI:
10.1021/acssuschemeng.6b00907

13. Relative Significance of the Negative Impacts of Hemicelluloses on Enzymatic Cellulose Hydrolysis Is Dependent on Lignin Content: Evidence from Substrate Structural Features and Protein Adsorption

Author:
Chen, Hongmei; Zhao, Xuebing; Liu, Dehua
Source:
ACS sustainable chemistry 2016 v.4 no.12 pp. 6668-6679
ISSN:
2168-0485
Subject:
acid hydrolysis; adsorption; biomass; cell walls; cellulose; cellulosic fibers; deformation; delamination; delignification; digestibility; endo-1,4-beta-glucanase; enzymatic hydrolysis; glucose; lignin; lignocellulose; melting; particle size; porosity; sulfuric acid; surface area; temperature; wheat straw; xylan
Abstract:
... The biomass recalcitrance of the lignocellulose cell wall constructed by its chemical components, especially hemicelluloses and lignin, has become a bottleneck for the efficient release of glucose. The presence of hemicelluloses has been considered as a major factor limiting the enzymatic digestibility of lignocellulose biomass. However, most of the reported works on the effect of hemicelluloses r ...
DOI:
10.1021/acssuschemeng.6b01540

14. Revealing the Molecular Structural Transformation of Hardwood and Softwood in Dilute Acid Flowthrough Pretreatment

Author:
Zhang, Libing; Pu, Yunqiao; Cort, John R.; Ragauskas, Arthur J.; Yang, Bin
Source:
ACS sustainable chemistry 2016 v.4 no.12 pp. 6618-6628
ISSN:
2168-0485
Subject:
Pinus contorta var. latifolia; biomass; cellulose; crystal structure; hardwood; hemicellulose; hydrolysates; lignin; lignocellulose; molecular weight; softwood; sugars; sulfuric acid; temperature
Abstract:
... To understand better the intrinsic recalcitrance of lignocellulosic biomass, the main hurdle to its efficient deconstruction, the effects of dilute acid flowthrough pretreatment on the dissolution chemistry of hemicellulose, cellulose, and lignin for both hardwood (e.g., poplar wood) and softwood (e.g., lodgepole pine wood) were investigated at temperatures of 200 to 270 °C and a flow rate of 25 m ...
DOI:
10.1021/acssuschemeng.6b01491

15. Dynamic Dielectric Properties of a Wood Liquefaction System Using Polyethylene Glycol and Glycerol

Author:
Zhou, Mengchao; Eberhardt, Thomas L.; Cai, Bo; Hse, Chung-Yun; Pan, Hui
Source:
ACS sustainable chemistry 2017 v.5 no.1 pp. 1123-1131
ISSN:
2168-0485
Subject:
biomass; catalysts; cellulose; chemical composition; dielectric properties; energy; glycerol; heat; lignin; lignocellulose; liquefaction; microwave treatment; models; molecular weight; polyethylene glycol; solvents; sulfuric acid; temperature; wood; xylan
Abstract:
... Microwave-assisted liquefaction has shown potential for rapid thermal processing of lignocellulosic biomass. The efficiency of microwave heating depends largely on the dielectric properties of the materials being heated. The objective of this study was to investigate the dynamic interactions between microwave energy and the reaction system during the liquefaction of a woody biomass sample. The die ...
DOI:
10.1021/acssuschemeng.6b02447

16. Efficient Hydrolysis of Polysaccharides in Bagasse by in Situ Synthesis of an Acidic Ionic Liquid after Pretreatment

Author:
Satria, Heri; Kuroda, Kosuke; Endo, Takatsugu; Takada, Kenji; Ninomiya, Kazuaki; Takahashi, Kenji
Source:
ACS sustainable chemistry 2017 v.5 no.1 pp. 708-713
ISSN:
2168-0485
Subject:
acid hydrolysis; bagasse; biomass; catalytic activity; electrodialysis; glucose; ionic liquids; microwave treatment; polysaccharides; sulfuric acid; temperature; xylose; zwitterions
Abstract:
... A highly efficient hydrolytic method using an acidic ionic liquid is proposed: pretreatment of biomass with H₂SO₄; simple in situ synthesis of an acidic ionic liquid, 1-(1-butylsulfonic)-3-methylimidazolium hydrosulfate ([(HSO₃)⁴C₄C₁im]HSO₄), through addition of a zwitterion to the pretreated solution; and subsequent hydrolysis in the [(HSO₃)⁴C₄C₁im]HSO₄ solution at 100 °C under microwave heating. ...
DOI:
10.1021/acssuschemeng.6b02055

17. Efficient Method of Lignin Isolation Using Microwave-Assisted Acidolysis and Characterization of the Residual Lignin

Author:
Zhou, Long; Budarin, Vitaliy; Fan, Jiajun; Sloan, Raymond; Macquarrie, Duncan
Source:
ACS sustainable chemistry 2017 v.5 no.5 pp. 3768-3774
ISSN:
2168-0485
Subject:
Fourier transform infrared spectroscopy; acidolysis; aromatic compounds; biomass; carbon; cellulose; gas chromatography-mass spectrometry; hemicellulose; lignin; liquefaction; microwave treatment; nuclear magnetic resonance spectroscopy; softwood; stable isotopes; sulfuric acid; temperature; thermal stability
Abstract:
... Microwave heating is characterized by high efficiency and selectivity in biomass treatment. Due to the high thermal stability and low polarity of lignin, isolation of lignin by high-temperature microwave treatment is a promising subject for investigation. In this paper, microwave treatment is applied to polysaccharide liquefaction and lignin isolation from softwood at 160–210 °C for 10 min with di ...
DOI:
10.1021/acssuschemeng.6b02545

18. Comprehensive Utilization of Hemicellulose and Cellulose To Release Fermentable Sugars from Corncobs via Acid Hydrolysis and Fast Pyrolysis

Author:
Jiang, Liqun; Wu, Nannan; Zheng, Anqing; Liu, Anqi; Zhao, Zengli; Zhang, Fan; He, Fang; Li, Haibin
Source:
ACS sustainable chemistry 2017 v.5 no.6 pp. 5208-5213
ISSN:
2168-0485
Subject:
acid hydrolysis; alkaline earth metals; biomass; biorefining; cellulose; corn cobs; cost effectiveness; fermentation; lignocellulose; polymers; pyrolysis; raw materials; sugars; sulfuric acid; temperature; xylan
Abstract:
... Conversion of lignocellulose to sugars suitable for microbial fermentation is an outstanding obstacle in developing biorefinery. Both hemicellulose and cellulose fractions are polymers of sugars and thereby primary candidates for fermentable sugars production. In this study, the flexibility of an integrated biomass conversion process was offered. The hemicellulose of corncobs was utilized to relea ...
DOI:
10.1021/acssuschemeng.7b00561

19. An Insight into the Selective Conversion of Bamboo Biomass to Ethyl Glycosides

Author:
Ma, Yan; Tan, Weihong; Wang, Kui; Wang, Jingxin; Jiang, Jianchun; Xu, Junming
Source:
ACS sustainable chemistry 2017 v.5 no.7 pp. 5880-5886
ISSN:
2168-0485
Subject:
bamboos; biomass; chemical industry; ethanol; glucose; glucosides; isomers; lignocellulose; liquefaction; raw materials; renewable energy sources; sulfuric acid; temperature; xylose
Abstract:
... Selective conversion of lignocellulosic biomass to ethyl glycosides and other valued chemicals is an important step for biomass utilization. In this paper, directional liquefaction of bamboo biomass into ethyl glucosides and ethyl xylosides with acid in ethanol media was investigated. The ethyl glycoside distribution was found to depend mainly on the temperature and the amount of H₂SO₄. Under a sh ...
DOI:
10.1021/acssuschemeng.7b00618

20. Production of Furfural from Process-Relevant Biomass-Derived Pentoses in a Biphasic Reaction System

Author:
Mittal, Ashutosh; Black, Stuart K.; Vinzant, Todd B.; O’Brien, Marykate; Tucker, Melvin P.; Johnson, David K.
Source:
ACS sustainable chemistry 2017 v.5 no.7 pp. 5694-5701
ISSN:
2168-0485
Subject:
corn stover; fuels; furfural; hydrolysates; ion exchange; pentoses; resins; solvents; sulfuric acid; temperature; toluene; xylose
Abstract:
... Furfural is an important fuel precursor which can be converted to hydrocarbon fuels and fuel intermediates. In this work, the production of furfural by dehydration of process-relevant pentose rich corn stover hydrolyzate using a biphasic batch reaction system has been investigated. Methyl isobutyl ketone (MIBK) and toluene have been used to extract furfural and enhance overall furfural yield by li ...
DOI:
10.1021/acssuschemeng.7b00215

21. Kinetics of Furfural Production from Corn Cob in γ-Valerolactone Using Dilute Sulfuric Acid as Catalyst

Author:
Li, Xiaoyun; Liu, Qingling; Luo, Chunhui; Gu, Xiaochao; Lu, Lefu; Lu, Xuebin
Source:
ACS sustainable chemistry 2017 v.5 no.10 pp. 8587-8593
ISSN:
2168-0485
Subject:
activation energy; catalysts; corn cobs; furfural; hemicellulose; kinetics; lactones; models; reaction kinetics; response surface methodology; solvents; sulfuric acid; temperature
Abstract:
... Conversion of corn cob to furfural was investigated using γ-valerolactone as the solvent with a dilute sulfuric acid catalyst. A maximum furfural yield of 99.50% was obtained at 190 °C for 20 min with 0.10% sulfuric acid. A well-evaluated kinetic model was used for this reaction, and its activation energy was calculated. The model agreed closely with the experimental data and kinetics parameters, ...
DOI:
10.1021/acssuschemeng.7b00950

22. Multifunctional, Self-Activating Oxygen-Rich Holey Carbon Monolith Derived from Agarose Biopolymer

Author:
Sahu, Vikrant; Marichi, Ram Bhagat; Singh, Gurmeet; Sharma, Raj Kishore
Source:
ACS sustainable chemistry 2017 v.5 no.10 pp. 8747-8755
ISSN:
2168-0485
Subject:
agarose; biopolymers; carbon; electrochemistry; electrodes; energy; lamps; mechanical properties; nanopores; porous media; sulfuric acid; surface area; temperature
Abstract:
... Agarose, a natural biopolymer, is carbonized to synthesize an economical lightweight (0.05 g cm–³) mesoporous carbon monolith with large BET surface area (625 m² g–¹). The monolith prepared at different temperatures (700, 800, 900 °C) exhibits interesting morphologies without using any activating agent. The holey pattern appearing at 900 °C, besides increasing the meso/microporosity, confirms the ...
DOI:
10.1021/acssuschemeng.7b01543

23. Effect of Pretreatment on Durability of fct-Structured Pt-Based Alloy Catalyst for the Oxygen Reduction Reaction under Operating Conditions in Polymer Electrolyte Membrane Fuel Cells

Author:
Jung, Won Suk; Popov, Branko N.
Source:
ACS sustainable chemistry 2017 v.5 no.11 pp. 9809-9817
ISSN:
2168-0485
Subject:
alloys; aspartate transaminase; catalysts; durability; electrochemistry; electrolytes; fuel cells; heat treatment; oxygen; polymers; salts; sulfuric acid; temperature
Abstract:
... The effects of different pretreatments on performance and durability of the fct-structured Pt-based alloy catalyst were investigated under operating conditions in PEMFCs. The fct-structured PtCo catalyst (PtCo/CN) was prepared by impregnating transition metal salts into Pt/CN catalyst followed by a heat-treatment under a reducing atmosphere. To remove the excess amount of transition metal on the c ...
DOI:
10.1021/acssuschemeng.7b01728