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1. On the limiting factors of the waste heat recovery via ORC-based power units for on-the-road transportation sector

Author:
Di Battista, Davide; Di Bartolomeo, Marco; Villante, Carlo; Cipollone, Roberto
Source:
Energy conversion and management 2018 v.155 pp. 68-77
ISSN:
0196-8904
Subject:
carbon dioxide; diesel engines; energy use and consumption; greenhouse gas emissions; heat exchangers; heat recovery; temperature; transportation; vapors; wastes
Abstract:
... Among the wide technological opportunities to reduce CO2 emissions in the transportation sector, Waste Heat Recovery (WHR), done by Organic Rankine Cycle (ORC) power units, was subject of a great scientific interest. However, several complications apply for an on-board operation and management, which reduce its real benefit in terms of net fuel consumption reduction. Weight increase, encumbrances, ...
DOI:
10.1016/j.enconman.2017.10.091

2. An efficient temperature swing adsorption (TSA) process for separating CO2 from CO2/N2 mixture using Mg-MOF-74

Author:
Ben-Mansour, Rached; Qasem, Naef A.A.
Source:
Energy conversion and management 2018 v.156 pp. 10-24
ISSN:
0196-8904
Subject:
adsorbents; adsorption; ambient temperature; burning; carbon dioxide; carbon sequestration; computer simulation; computer software; desorption; energy costs; energy use and consumption; flue gas; fossil fuels; fuel combustion; global warming; models
Abstract:
... Carbon dioxide emitted from fossil fuel burning processes is quantitatively the most contributor to global warming. It is believed that climate change could be mitigated by means of Carbon Capture and Storage (CCS). CO2 physical adsorption separation has the potential of capture carbon dioxide with minimum energy costs. A special type of metal organic frameworks named Mg-MOF-74 is an exceptional a ...
DOI:
10.1016/j.enconman.2017.11.010

3. Enhanced carbon utilization efficiency and FAME production of Chlorella sp. HS2 through combined supplementation of bicarbonate and carbon dioxide

Author:
Nayak, Manoranjan; Suh, William I.; Lee, Bongsoo; Chang, Yong Keun
Source:
Energy conversion and management 2018 v.156 pp. 45-52
ISSN:
0196-8904
Subject:
Chlorella; air; bicarbonates; biodiesel; biomass production; carbon; carbon dioxide; carbon dioxide fixation; cost effectiveness; culture flasks; culture media; fatty acid composition; fuel production; microalgae; photobioreactors; specific growth rate
Abstract:
... The optimum concentration of dissolved carbon in the microalgal culture medium is a vital requirement for enhanced biomass production. The present study investigates the effect of supplying NaHCO3 with CO2 as the inorganic carbon source to enhance the utilization efficiency of CO2 for maximum FAME productivity of Chlorella sp. HS2. The specific growth rate (0.615 d⁻¹), biomass productivity (530.1  ...
DOI:
10.1016/j.enconman.2017.11.002

4. Parametric study of a direct-fired supercritical carbon dioxide power cycle coupled to coal gasification process

Author:
Zhao, Yongming; Wang, Bo; Chi, Jinling; Xiao, Yunhan
Source:
Energy conversion and management 2018 v.156 pp. 733-745
ISSN:
0196-8904
Subject:
carbon; carbon dioxide; coal; combustion; gasification; models; power plants; temperature
Abstract:
... The direct-fired supercritical carbon dioxide power cycle not only has the potential of reaching high efficiency, but also achieves near 100% carbon capture in a more inherent and natural manner. A conceptual flow sheet of the direct-fired supercritical carbon dioxide power cycle that is coupled to the coal gasification process is built in this study. A detailed turbine cooling model is added to b ...
DOI:
10.1016/j.enconman.2017.11.044

5. Performance analysis of an eight-layered bed PSA process for H2 recovery from IGCC with pre-combustion carbon capture

Author:
Moon, Dong-Kyu; Park, Yongha; Oh, Hyun-Taek; Kim, Shin-Hyuk; Oh, Min; Lee, Chang-Ha
Source:
Energy conversion and management 2018 v.156 pp. 202-214
ISSN:
0196-8904
Subject:
activated carbon; adsorption; carbon dioxide; carbon monoxide; cost effectiveness; electric power; energy; gasification; hydrogen; power plants; synthesis gas; zeolites
Abstract:
... Integrated gasification combined cycle (IGCC) plants that are also capable of CO2 capture have received significant attention as the next generation of coal-based power plants for the co-production of H2 and electrical power. Accordingly, for a cost-effective and environmentally friendly poly-generation IGCC process, efficient techniques need to be developed to recover H2 from the syngas of an IGC ...
DOI:
10.1016/j.enconman.2017.11.013

6. Techno-economic comparison of Acetone-Butanol-Ethanol fermentation using various extractants

Author:
Dalle Ave, Giancarlo; Adams, Thomas A.
Source:
Energy conversion and management 2018 v.156 pp. 288-300
ISSN:
0196-8904
Subject:
Panicum virgatum; biomass; butanol; carbon dioxide; computer software; emissions; environmental impact; fermentation; gasoline; petroleum; prices; saccharification; toxicity; wastewater treatment
Abstract:
... This work compares various chemicals for use as extractants in second-generation Acetone-Butanol-Ethanol fermentation on economic and environmental bases. Both non-toxic and toxic extractants are considered in this study. The combinative extractive-distillation separation process was modelled using a combination of Microsoft Excel 2013, MATLAB 2015 and Aspen Plus v8.8. Separation trains were desig ...
DOI:
10.1016/j.enconman.2017.11.020

7. Comparative study on the evolution of physicochemical characteristics of biochar produced from bio-oil distillation residue under different induction atmosphere

Author:
Zhu, Xiefei; Li, Kai; Zhang, Liqiang; Wu, Xing; Zhu, Xifeng
Source:
Energy conversion and management 2018 v.157 pp. 288-293
ISSN:
0196-8904
Subject:
Fourier transform infrared spectroscopy; biochar; biofuels; calorimeters; carbon dioxide; distillation; furnaces; moieties; nitrogen; temperature; thermal stability; thermogravimetry; vibration
Abstract:
... In the study, biochar was easily produced from bio-oil distillation residue through a tube furnace at a broad induction temperature range of 200–700 °C under nitrogen and carbon dioxide. The comparative evolution of biochar was characterized by evaluating its physicochemical properties including elements, calorific values, functional groups, graphitization degree and thermal stability. The results ...
DOI:
10.1016/j.enconman.2017.12.010

8. Computational investigations of heat transfer to supercritical CO2 in a large horizontal tube

Author:
Wang, Jianyong; Guan, Zhiqiang; Gurgenci, Hal; Hooman, Kamel; Veeraragavan, Anand; Kang, Xin
Source:
Energy conversion and management 2018 v.157 pp. 536-548
ISSN:
0196-8904
Subject:
carbon dioxide; convection; models; prediction; temperature; turbulent flow
Abstract:
... Buoyancy has been found to have a significant influence on the flow and heat transfer behaviors of turbulent sCO2. This paper uses the computational method to investigate the flow and heat transfer characteristics of turbulent sCO2 in a large horizontal tube with the buoyancy effects taken into account, RNG and three selected low-Reynolds number k-ε turbulence models have been validated against ex ...
DOI:
10.1016/j.enconman.2017.12.046

9. Design concept for coal-based polygeneration processes of chemicals and power with the lowest energy consumption for CO2 capture

Author:
Huang, Hong; Yang, Siyu; Cui, Peizhe
Source:
Energy conversion and management 2018 v.157 pp. 186-194
ISSN:
0196-8904
Subject:
carbon dioxide; carbon monoxide; coal; cost effectiveness; energy; energy conservation; energy costs; hydrogen; methanol; models; power generation; synthesis gas
Abstract:
... Single coal based chemicals production processes emit large amount of CO2 during conversion of the syngas to the high H2/CO ratio feed gas for chemicals synthesis. However, the feed gas is with a low CO2 molar fraction, leading to high energy cost for CO2 capture. In this work, we try to reduce energy consumption for CO2 capture by improving its molar fraction. A new methanol and power polygenerat ...
DOI:
10.1016/j.enconman.2017.11.073

10. Dynamic optimization of dry reformer under catalyst sintering using neural networks

Author:
Azzam, Mazen; Aramouni, Nicolas Abdel Karim; Ahmad, Mohammad N.; Awad, Mariette; Kwapinski, Witold; Zeaiter, Joseph
Source:
Energy conversion and management 2018 v.157 pp. 146-156
ISSN:
0196-8904
Subject:
algorithms; carbon; carbon dioxide; carbon monoxide; catalysts; hydrogen; longevity; methane; neural networks; synthesis gas; temperature
Abstract:
... Artificial neural networks (ANN’s) have been used to optimize the performance of a dry reformer with catalyst sintering taken into account. In particular, we study the effects of temperature, pressure and catalyst diameter on the methane and CO2 conversions, as well the H2 to CO ratio and the molar percentage of solid carbon deposited on the catalyst. The design of the ANN was automated using a ge ...
DOI:
10.1016/j.enconman.2017.11.089

11. Leveraging the benefits of ethanol in advanced engine-fuel systems

Author:
Morganti, Kai; Almansour, Mohammed; Khan, Ahmad; Kalghatgi, Gautam; Przesmitzki, Steven
Source:
Energy conversion and management 2018 v.157 pp. 480-497
ISSN:
0196-8904
Subject:
Monte Carlo method; arable soils; bioethanol; biomass; carbon dioxide; corn; energy; energy use and consumption; ethanol; ethylene; feedstocks; fermentation; fuel production; gasoline; greenhouse gas emissions; greenhouse gases; latent heat; oil and gas industry; petroleum; spark ignition engines; uncertainty; volatilization
Abstract:
... Ethanol is one of the most desirable fuels for spark-ignition engines. It offers high-octane quality and a latent heat of vaporization that is four times greater than gasoline on a stoichiometric basis. Anhydrous ethanol can also readily be blended into oil-based fuels, thereby enabling improved engine efficiency and reduced greenhouse gas (GHG) emissions. However, the use of ethanol is currently ...
DOI:
10.1016/j.enconman.2017.11.086

12. Process simulation and optimization of municipal solid waste fired power plant with oxygen/carbon dioxide combustion for near zero carbon dioxide emission

Author:
Ding, Guangchao; He, Boshu; Cao, Yang; Wang, Chaojun; Su, Liangbin; Duan, Zhipeng; Song, Jingge; Tong, Wenxiao; Li, Xuezheng
Source:
Energy conversion and management 2018 v.157 pp. 157-168
ISSN:
0196-8904
Subject:
air; carbon dioxide; combustion; energy; flue gas; models; municipal solid waste; oxygen; pollutants; power generation; power plants; waste incineration; zero emissions; China
Abstract:
... As a new type of high-intensity combustion technology, oxy-fuel combustion technology can effectively reduce the generation and emission of pollutants, particularly near zero emission of carbon dioxide when applied to the waste incineration process. Compared to the conventional air waste-to-energy incineration power generation, the municipal solid waste oxy-fuel combustion power generation system ...
DOI:
10.1016/j.enconman.2017.11.087

13. Study of synergistic effects during co-pyrolysis of cellulose and high-density polyethylene at various ratios

Author:
Yuan, Haoran; Fan, Honggang; Shan, Rui; He, Mingyang; Gu, Jing; Chen, Yong
Source:
Energy conversion and management 2018 v.157 pp. 517-526
ISSN:
0196-8904
Subject:
aldehydes; alkanes; carbon dioxide; cellulose; cleavage (chemistry); cracking; hydrogen; mass spectrometry; polyethylene; pyrolysis; pyrolysis gas chromatography; synergism; thermogravimetry
Abstract:
... The mechanism of synergistic effects occurred during co-pyrolysis of cellulose (CE) and high-density polyethylene (HDPE), mixed at various mass ratios (3:1, 1:1, 1:3 w/w), was studied by thermogravimetric analysis coupled with mass spectrometry (TG-MS) and pyrolysis-gas chromatography coupled with mass spectrometry (Py-GC/MS). The TG analysis showed that the co-pyrolysis process was divided into t ...
DOI:
10.1016/j.enconman.2017.12.038

14. Study of waste heat recovery potential and optimization of the power production by an organic Rankine cycle in an FPSO unit

Author:
Reis, Max Mauro L.; Gallo, Waldyr L.R.
Source:
Energy conversion and management 2018 v.157 pp. 409-422
ISSN:
0196-8904
Subject:
algorithms; carbon dioxide; electric power; energy use and consumption; equipment; gases; greenhouse gas emissions; heat recovery; heating systems; models; power generation; system optimization; turbines; wastes
Abstract:
... This paper aims to explore the alternatives for waste heat recovery in a floating production storage and offloading (FPSO) platform to meet the demand for heat (from hot water) and to maximize the electric power generation through the organic Rankine cycle (ORC) with purpose to increase the overall thermal efficiency of the process and reduce CO2 emissions. Two different cycles’ configurations are ...
DOI:
10.1016/j.enconman.2017.12.015

15. Thermodynamic assessment of an integrated biomass and coal co-gasification, cryogenic air separation unit with power generation cycles based on LNG vaporization

Author:
Esfilar, Reza; Mehrpooya, Mehdi; Moosavian, S.M. Ali
Source:
Energy conversion and management 2018 v.157 pp. 438-451
ISSN:
0196-8904
Subject:
air; biomass; carbon dioxide; coal; cold; coolers; equipment; exergy; gasification; heat; heat exchangers; heaters; oxygen; oxygen production; power generation; refrigeration; specific energy; steam; synthesis gas; volatilization
Abstract:
... A novel self-heat system which consists of a coal and biomass co-gasification process, low-temperature air separation based on the LNG vaporization, steam cycle, supercritical CO2 power generation unit and cryogenic carbon dioxide capture section is introduced and analyzed. Some new aspects of this study can be categorized as follows. There is no need to implement external heat sources and refrige ...
DOI:
10.1016/j.enconman.2017.12.026

16. Catalytic gasification of algal biomass for hydrogen-rich gas production: Parametric optimization via central composite design

Author:
Raheem, Abdul; Ji, Guozhao; Memon, Asif; Sivasangar, Siva; Wang, Wei; Zhao, Ming; Taufiq-Yap, Yun Hin.
Source:
Energy conversion and management 2018 v.158 pp. 235-245
ISSN:
0196-8904
Subject:
algae; biomass; carbon dioxide; carbon monoxide; catalysts; gasification; hydrogen; hydrogen production; methane; models; temperature
Abstract:
... This study presents the optimization of algal biomass catalytic gasification for hydrogen-rich gas production. Three operating parameters under varying conditions of temperature (700–900 °C), catalyst loading (5–20 wt%) and reaction time (15–40 min) were optimized. The central composite design (CCD) was used to perform optimization and to investigate the influence of operating parameters on respon ...
DOI:
10.1016/j.enconman.2017.12.041

17. Energy and exergy analyses of a parabolic trough solar power plant using carbon dioxide power cycle

Author:
AlZahrani, Abdullah A.; Dincer, Ibrahim
Source:
Energy conversion and management 2018 v.158 pp. 476-488
ISSN:
0196-8904
Subject:
angle of incidence; carbon dioxide; collectors; exergy; heat transfer; models; power plants; solar energy; thermal energy
Abstract:
... This paper examines both energy and exergy performances of parabolic trough collectors (PTCs), as part of a solar power plant, under different design and operating conditions. The proposed solar power plant utilizes an innovative supercritical carbon dioxide (S-CO2) power cycle to convert the heat produced by the PTCs to power. In addition, the present system integrates a thermal energy storage (T ...
DOI:
10.1016/j.enconman.2017.12.071

18. Passenger transportation sector gasoline consumption due to friction in Southeast Asian countries

Author:
Chong, W.W.F.; Ng, J.-H.; Rajoo, S.; Chong, C.T.
Source:
Energy conversion and management 2018 v.158 pp. 346-358
ISSN:
0196-8904
Subject:
automobiles; carbon; carbon dioxide; cost effectiveness; energy; energy conservation; energy costs; energy use and consumption; environmental impact; fossil fuels; friction; greenhouse gas emissions; greenhouse gases; motorcycles; transportation; South East Asia
Abstract:
... Energy demand in the transportation sector across Southeast Asian (SEA) region is rapidly increasing. This poses a challenge to the sector in mitigating greenhouse gas (GHG) emissions because of its heavy reliance on fossil fuels. Decarbonisation efforts tend to focus on the use of low carbon energy, often neglecting frictional losses in vehicles. Therefore, the study aims to determine the fuel co ...
DOI:
10.1016/j.enconman.2017.12.083

19. Combined heat and power generation with lime production for direct air capture

Author:
Hanak, Dawid P.; Manovic, Vasilije
Source:
Energy conversion and management 2018 v.160 pp. 455-466
ISSN:
0196-8904
Subject:
air; carbon dioxide; carbon sequestration; economic feasibility; fuel cells; heat; income; power generation; prices; uncertainty
Abstract:
... Carbon capture and storage (CCS) has been shown to be the least cost-intensive option for decarbonisation of the power, heat, and industrial sectors. Importantly, negative-emission technologies, including direct air capture (DAC), may still be required after near-complete decarbonisation of the stationary emission sources. This study evaluates the feasibility of a novel polygeneration process for ...
DOI:
10.1016/j.enconman.2018.01.037

20. Comparison of combined cooling, heating and power (CCHP) systems with different cooling modes based on energetic, environmental and economic criteria

Author:
Zhang, Jiaxuan; Cao, Sheng; Yu, Lijun; Zhou, Yaodong
Source:
Energy conversion and management 2018 v.160 pp. 60-73
ISSN:
0196-8904
Subject:
absorption; algorithms; carbon dioxide; climate; cooling; cost effectiveness; energy conservation; energy costs; heat pumps; models; natural gas; prices; China
Abstract:
... Combined cooling, heating and power (CCHP) system is drawing great attention due to its energy-saving, environmentally friendly and cost-saving characteristics. Conventionally, CCHP system uses the water–LiBr absorption chiller to meet the cooling demand. In this paper, comparison of exhaust-gas-and-hot-water-driven absorption chiller (AC) and another three cooling modes, including AC combined wit ...
DOI:
10.1016/j.enconman.2018.01.019