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Electrolytic cell engineering and device optimization for electrosynthesis of e-biofuels via co-valorisation

Faraz Montazersadgh, Hao Zhang, Anas Alkayal, Benjamin Buckley, Ben W. Kolosz, Bing Xu, Jin Xuan

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 1, Pages 208-219 doi: 10.1007/s11705-020-1945-6

Abstract: The current study aims at developing a new electrochemical platform to produce low-carbon e-biofuel throughIn this approach, CO is reduced at the cathode to produce drop-in fuels (e.g., methanol) while value-addedchemicals (e.g., selective oxidation of alcohols, aldehydes, carboxylic acids and amines/amides) are

Keywords： electrosynthesis e-biofuels CO₂ utilization computational model

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Biofuels and food security

Dmitry S. STREBKOV

Frontiers of Agricultural Science and Engineering 2015, Volume 2, Issue 1, Pages 1-12 doi: 10.15302/J-FASE-2015052

Abstract: The major source of energy comes from fossil fuels. The current situation in the field of fuel and energy is becoming more problematic as world population continues to grow because of the limitation of fossil fuels reserve and its pressure on environment. This review aims to find economic, reliable, renewable and non-polluting energy sources to reduce high energy tariffs in Russian Federation. Biofuel is fuel derived directly from plants, or indirectly from agricultural, commercial, domestic, and/or industrial wastes. Other alternative energy sources including solar energy and electric power generation are also discussed. Over 100 Mt of biomass available for energy purposes is produced every year in Russian. One of the downsides of biomass energy is its potential threatens to food security and forage industries. An innovative approach proved that multicomponent fuel (80% diesel oil content for motor and 64% for in stove fuel) can remarkably reduce the costs. This paper proposed that the most promising energy model for future is based on direct solar energy conversion and transcontinental terawatt power transmission with the use of resonant wave-guide technology.

Keywords： fossil fuels biofuels food security electric power solar energy

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Selective preparation for biofuels and high value chemicals based on biochar catalysts

Frontiers in Energy 2023, Volume 17, Issue 5, Pages 635-653 doi: 10.1007/s11708-023-0878-4

Abstract: In this paper, the recent advances in biofuels and high chemicals for selective production based on biocharSuitable biochar catalysts can enhance the yield of biofuels and higher-value chemicals.and advancement of the biochar catalyst based on mechanism research will be beneficial to increase biofuelsbased on the biomass properties are vital for the selective production of high-value chemicals and biofuels

Keywords： biomass biochar catalysts biofuels high chemicals

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Evolving perspectives on biofuels in the United States

Lisa C. DIRKS, Gary W. DIRKS, Jianguo WU

Frontiers in Energy 2012, Volume 6, Issue 4, Pages 379-393 doi: 10.1007/s11708-012-0213-y

Abstract: Biofuels represent an important source of renewable energy and may play a crucial role in developingThe pros and cons of biofuels, however, have been debated both scientifically and politically.In this paper, the evolvement of the perspectives and policies on biofuels in the United States in theThe US has a long history of supporting corn-based ethanol and more recently advanced biofuels.Changes in perspectives on biofuels from largely unrelated groups led to changes in policy and market

Keywords： renewable energy biofuels energy sustainability

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of salting-out effect and sugaring-out effect: driving forces for novel liquid-liquid extraction of biofuels

Chuhan Fu, Zhuoxi Li, Zengran Sun, Shaoqu Xie

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 4, Pages 854-871 doi: 10.1007/s11705-020-1980-3

Abstract: Biofuels and bio-based chemicals are getting more and more attention because of their sustainable andbroths and the high energy-intensive separation and purification process hinder the competitiveness of biofuelsHence, the production and the separation of biofuels and bio-based chemicals in energy-saving, low-costresearch into the salting-out/sugaring-out and salting-out/sugaring-out extraction not only affords biofuels

Keywords： salting-out sugaring-out extraction biofuels biochemicals application

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Upgrading of derived pyrolysis vapors for the production of biofuels from corncobs

Liaoyuan Mao, Yanxin Li, Z. Conrad Zhang

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1, Pages 50-58 doi: 10.1007/s11705-017-1685-4

Abstract: A bubbling fluidized bed pyrolyzer was integrated with an honeycomb as a catalytic upgrading zone for the conversion of biomass to liquid fuels. In the upgrading zone, zeolite coated ceramic honeycomb (ZCCH) catalysts consisting of ZSM-5 (Si/Al=25) were stacked and N or recycled non-condensable gas was used as a carrier gas. Ground corncob particles were fast pyrolyzed in the bubbling bed using fine sand particles as a heat carrier and the resulting pyrolysis vapors were passed on-line over the catalytic upgrading zone. The influence of carrier gas, temperature, and weight hourly space velocity (WHSV) of catalyst on the oil product properties, distribution and mass balance were studied. Using ZCCH effectively increased the hydrocarbon yield and the heating value of the dry oil, especially in the presence of the recycled noncondensable gas. Even a low usage of zeolite catalyst at WSHV of 180 h was effective in upgrading the pyrolysis oil and other light olefins. The highest hydrocarbon (≥C2) and liquid aromatics yields reached to 14.23 and 4.17 wt-%, respectively. The undesirable products including light oxygenates, furans dramatically decreased in the presence of the ZCCH catalyst.

Keywords： corncob monolith upgrading pyrolysis

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Will biomass be used for bioenergy or transportation biofuels?

Jinguang HU, William James CADHAM, Susan van DYK, Jack N. SADDLER

Frontiers of Agricultural Science and Engineering 2017, Volume 4, Issue 4, Pages 473-481 doi: 10.15302/J-FASE-2017168

Abstract: In each of these countries, bioenergy and biofuels are already important in their energy mix.of these countries, biomass is predominantly used to produce bioenergy, even in those regions where biofuels

Keywords： bioenergy biofuel biomass renewable energy policy

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Mixed culture of

Kishore Gopalakrishnan, Javad Roostaei, Yongli Zhang

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 4, doi: 10.1007/s11783-018-1075-2

Abstract:

RSM is used to explore the impact of different parameter on algal growth response.

Mixed algal culture promotes algal biomass and lipid accumulation.

Optimized conditions achieve maximum productivity of algal biomass and lipid.

Keywords： Algal biofuels Algal mixed cultures Algal biomass Algal lipid Wastewater Response surface methodology

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Review of the direct thermochemical conversion of lignocellulosic biomass for liquid fuels

Jianchun JIANG,Junming XU,Zhanqian SONG

Frontiers of Agricultural Science and Engineering 2015, Volume 2, Issue 1, Pages 13-27 doi: 10.15302/J-FASE-2015050

Abstract: resources requires the development of efficient conversion technologies for production of second-generation biofuelsSeveral direct thermochemical processes are employed in the production of liquid biofuels depending onfuture prospects for direct thermochemical conversion in biorefineries for the production of high grade biofuels

Keywords： lignocellulosic biomass thermochemical liquid fuels upgrading biofuels

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Sustainability of metal recovery from E-waste

Biswajit Debnath, Ranjana Chowdhury, Sadhan Kumar Ghosh

Frontiers of Environmental Science & Engineering 2018, Volume 12, Issue 6, doi: 10.1007/s11783-018-1044-9

Abstract:

Metal recovery techniques from electronic waste reported in literature.

Metal recovery processes followed in Industries from electronic waste.

Sustainability analysis of metal recovery processes from electronic waste.

Keywords： E-waste Metal recovery Metal Recovery from E-waste (MREW) Sustainability

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risks of heavy metals, polybrominated diphenyl ethers, and polychlorinated dibenzo-dioxins/furans at e-waste

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 7, doi: 10.1007/s11783-023-1679-z

Abstract:

● Heavy metals and organic toxins may persist in legacy sites for a long time.

Keywords： E-waste Human health risk Organ risk Heavy metal toxicity PBDE PCDD/F

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Molecular dynamics modeling of a single diamond abrasive grain in grinding

SAVVOPOULOS,Nikolaos E. KARKALOS,Dimitrios E. MANOLAKOS

Frontiers of Mechanical Engineering 2015, Volume 10, Issue 2, Pages 168-175 doi: 10.1007/s11465-015-0337-y

Abstract:

In this paper the nano-metric simulation of grinding of copper with diamond abrasive grains, using the molecular dynamics (MD) method, is considered. An MD model of nano-scale grinding, where a single diamond abrasive grain performs cutting of a copper workpiece, is presented. The Morse potential function is used to simulate the interactions between the atoms involved in the procedure. In the proposed model, the abrasive grain follows a curved path with decreasing depth of cut within the workpiece to simulate the actual material removal process. Three different initial depths of cut, namely 4 ?, 8 ? and 12 ?, are tested, and the influence of the depth of cut on chip formation, cutting forces and workpiece temperatures are thoroughly investigated. The simulation results indicate that with the increase of the initial depth of cut, average cutting forces also increase and therefore the temperatures on the machined surface and within the workpiece increase as well. Furthermore, the effects of the different values of the simulation variables on the chip formation mechanism are studied and discussed. With the appropriate modifications, the proposed model can be used for the simulation of various nano-machining processes and operations, in which continuum mechanics cannot be applied or experimental techniques are subjected to limitations.

Keywords： molecular dynamics abrasive process chip formation cutting force temperature

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Policy options for Agriculture Green Development by farmers in China

Laurence E. D. SMITH

Frontiers of Agricultural Science and Engineering 2020, Volume 7, Issue 1, Pages 90-97 doi: 10.15302/J-FASE-2019290

Abstract:

Farmers are the key agents who manage land and water. Agriculture Green Development (AGD) requires a transformation in farming from high resource consumption and environmental cost to sustainable intensification with high productivity, high resource use efficiency and low environmental risk. This paper analyzes the public policy challenge of AGD and makes the case for a location-sensitive policy mix made up of regulation, advice provision, voluntarism and targeted incentives. The public agricultural extension service in China is a key resource, but one that requires reorientation and reform with the aim of better balancing high farm productivity with environmental protection.

Keywords： agriculture environment development incentives policy regulation

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The Use of Data Mining Techniques in Rockburst Risk Assessment

Luis Ribeiro e Sousa, Tiago Miranda, Rita Leal e Sousa, Joaquim Tinoco

Engineering 2017, Volume 3, Issue 4, Pages 552-558 doi: 10.1016/J.ENG.2017.04.002

Abstract:

Rockburst is an important phenomenon that has affected many deep underground mines around the world. An understanding of this phenomenon is relevant to the management of such events, which can lead to saving both costs and lives. Laboratory experiments are one way to obtain a deeper and better understanding of the mechanisms of rockburst. In a previous study by these authors, a database of rockburst laboratory tests was created; in addition, with the use of data mining (DM) techniques, models to predict rockburst maximum stress and rockburst risk indexes were developed. In this paper, we focus on the analysis of a database of in situ cases of rockburst in order to build influence diagrams, list the factors that interact in the occurrence of rockburst, and understand the relationships between these factors. The in situ rockburst database was further analyzed using different DM techniques ranging from artificial neural networks (ANNs) to naive Bayesian classifiers. The aim was to predict the type of rockburst—that is, the rockburst level—based on geologic and construction characteristics of the mine or tunnel. Conclusions are drawn at the end of the paper.

Keywords： Rockburst Data mining Bayesian networks In situ database

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Zero E-waste: Regulatory impediments and blockchain imperatives

Mengjun Chen, Oladele A. Ogunseitan

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 6, doi: 10.1007/s11783-021-1402-x

Abstract: Electronic waste (E-waste), the fastest growing category of solid hazardous waste presents various uniqueElectronic product repair, reuse and remanufacture (3re) are crucial for effective source reduction of E-wastediscs (CDs) to identify the challenges and to explore solutions for managing the risks associated with E-wasterefurbish fake/counterfeit product and copyright exhaustion, are proposed to accelerate source reduction in E-waste

Keywords： Blockchain E-waste Regulatory Policy Copyright Laws Repair-Reuse-Remanufacture Toxicity