Sumari Sumari^*, Mega Murti, Aman Santoso, Muhammad Roy Asrori

Journal of Renewable Materials, Vol.10, No.12, pp. 3659-3670, 2022, DOI:10.32604/jrm.2022.022995 - 14 July 2022

Abstract Kapok seed oil is an environmentally friendly biodiesel feedstock. The problem of the best catalyst for transesterification of Kapok seed oil still continues today. The research developed a base-heterogeneous catalyst with the effect of ultrasonic waves during transesterification. So, the study aims: (1) to determine the type of natural zeolite used, (2) to determine the characteristics of the synthesized CaO:BaO/ANZ catalyst, and (3) to determine the effectiveness of the CaO:BaO/ANZ catalyst in the biodiesel production process through sono-transesterification of kapok seed oil. The research stages consisted of: (1) activation of natural zeolite and its characterization,… More > Graphic Abstract

Hua Jing¹, Shiyao Lu¹, Lili Ji^1,*, Shijie Li¹, Baikang Zhu², Jian Guo³, Jiaxing Sun¹, Lu Cai⁴, Yaning Wang¹

Journal of Renewable Materials, Vol.10, No.12, pp. 3147-3165, 2022, DOI:10.32604/jrm.2022.020215 - 14 July 2022

Abstract In this study, the magnetic wakame biochar/Ni composites were prepared with three activating reagents of H₃PO₄, ZnCl₂ and KOH by one-step pyrolysis activation, characterized by BET, SEM, TEM, FI-IR, XRD, Raman, and elemental analyzer, and their adsorption performance for diesel were also analyzed. The results showed that wakame biochar/Ni composites had larger specific surface area, abundant porous structure, and various reactive groups, rendering its enhancement of adsorption efficiency. The adsorption experiments indicated that the maximum adsorption capacities for diesel using WBPA 0.5, WBHZ 0.5 and WBPH 0.5 were 4.11, 8.83, and 13.47 g/g, respectively. The Langmuir More >

Fahad Maoulida^1,2, Kassim Mohamed Aboudou^1,2,3,*, Djedjig Rabah², Mohammed El-Ganaoui²

FDMP-Fluid Dynamics & Materials Processing, Vol.18, No.6, pp. 1607-1617, 2022, DOI:10.32604/fdmp.2022.023199 - 27 June 2022

Abstract In this work, we present a feasibility study for a new hybrid power plant (PV-Wind-Diesel-Storage) directly connected to the electrical grid. Several simulations are performed to verify the performance of the hybrid system under different scenarios using real meteorological data. It is shown that the performances of the hybrid system connected to the electrical network depend obviously on the available energy resources and constraints because the renewable energies are intermittent. In addition, the price of the kWh of electricity supplied by the hybrid system is determined, which amounts to $0.209/kWh, which is very cost effective More > Graphic Abstract

Dehui Tong^1,2, Shunshun Qin^1,2,*, Quan Liu^1,2, Yuhan Li³, Jiewei Lin^2,3

FDMP-Fluid Dynamics & Materials Processing, Vol.18, No.6, pp. 1667-1682, 2022, DOI:10.32604/fdmp.2022.019768 - 27 June 2022

Abstract Avoiding cavitation inside the water jacket is one of the most important issues regarding the proper design of a diesel engine’s cylinder liner. Using CFD simulations conducted in the frame of a mixture multiphase approach, a moving grid technology and near-wall cavitation model, in the present study the factors and fluid-dynamic patterns that influence cavitation are investigated from both macroscopic and mesoscopic perspectives. Several factors are examined, namely: wall vibration, water jacket width, initial cavitation bubble radius, coolant temperature, and number of bubbles. The results show that reducing the cylinder liner vibration intensity can significantly More >

Xiangli Wang¹, Peiyong Ni^2,*

Energy Engineering, Vol.119, No.4, pp. 1697-1710, 2022, DOI:10.32604/ee.2022.021070 - 23 May 2022

Abstract Diesel particulate filter (DPF) is a leading technology reducing particle emissions from marine diesel engines. The removal or regeneration of soot in DPF is an important issue. The purpose of this study is to provide some reference strategies to design the DPF for marine diesel engines. In this paper, a mathematical model of a marine DPF was built up and the particle trap process and the regeneration dynamics were simulated. The results show that the cake soot mass concentrations from 0 to 4.2 g/L during the trap process increase linearly with the increase of the… More >

Fuping Wang¹, Lele Kang¹, Rui Ji¹, Tianji Liu¹, Qing Yu¹, Di Gao¹, Xiaoman Wang¹, Yitong Wang^1,*, Jie Yang^2,*

Journal of Renewable Materials, Vol.10, No.8, pp. 2099-2115, 2022, DOI:10.32604/jrm.2022.018806 - 25 April 2022

Abstract In the era of serious greenhouse gas emission and energy shortage, it is necessary to use solid waste to prepare new renewable materials. In this work, the potential application of reed straw and electric furnace dust was explored. Firstly, magnetic carbon carrier (EFD&C) was prepared by high temperature calcination, and then magnetic carbon catalyst (SM@EFD&C) was prepared by activation of sodium methoxide. The catalyst was used to prepare biodiesel by transesterification reaction to test its activity and stability. Reed biochar, EFD&C and SM@EFD&C were detected by Diffraction of X-rays (XRD), Fourier transform infrared (FT-IR), Inductively… More > Graphic Abstract

Yanfei Chen¹, Jingjing He^2,*, Hao Chen^2,*, Xin Su², Bin Xie²

Energy Engineering, Vol.119, No.3, pp. 1239-1259, 2022, DOI:10.32604/ee.2022.017847 - 31 March 2022

Abstract 20% n-butanol is blended in diesel by volume (noted as D80B20) and experiment has been carried out to study the effect on the combustion and emission characteristics based on a common rail diesel engine with exhaust gas recirculation (EGR) system. The results reveal that D80B20 has longer ignition delay, shorter combustion duration and higher maximum in-cylinder temperature than pure diesel (noted as D100). Further, the number concentration and volume concentration of ultrafine particles decrease significantly while NO_X emissions increase a little with the addition of n-butanol. When the exhaust gas is induced into cylinder, NO_X emissions More >

Shunshun Qin¹, Chengfen Xie¹, Song Li¹, Qi Yang¹, Jianwei Chen², Ke Sun^2,*

FDMP-Fluid Dynamics & Materials Processing, Vol.18, No.3, pp. 647-659, 2022, DOI:10.32604/fdmp.2022.017519 - 22 February 2022

Abstract The STAR-CCM + software is used to investigate the flow inside a cooling water jacket of an in-line six-cylinder diesel engine. The results show that the average flow velocity of the cooling water inside the jacket is 1.669 m/s while the flow velocity distribution is not uniform for each cylinder. Moreover, the fluid velocity in proximity to the cylinder head is too low, thereby affecting the cooling performances of the water jacket. Two corresponding structural optimization schemes are proposed to mitigate this issue and the post-optimization performances of the water jacket are discussed in detail. More >

Jinliang Zhu¹, Xiulei Wang¹, Guihua Wang¹, Xianglin Zhong², Zhenguo Li³, Zhiming Wang¹, Ke Sun^1,*, Shuzhan Bai^1,*

FDMP-Fluid Dynamics & Materials Processing, Vol.18, No.3, pp. 701-711, 2022, DOI:10.32604/fdmp.2022.019311 - 22 February 2022

Abstract Exhaust thermal management is essential to allow engines to meet the Euro VI emissions standards and reducing nitrogen oxide emissions is one of the most important targets being pursued nowadays. Along these lines, in the present study, engine’s thermal performances have been evaluated on the basis of a WHTC test, namely a transient engine dynamometer schedule defined by the global technical regulation (GTR) developed by the UN ECE GRPE group (the GTR is covering a world-wide harmonized heavy-duty certification (WHDC) procedure for engine exhaust emissions). The influence of thermal management on fuel consumption, intake, and… More >

Yibao Wang, Dongsheng Wang, Yudan Xue, Dailong Shi^*, Xiaoli Zhang, Yang Chai, Bang An

FDMP-Fluid Dynamics & Materials Processing, Vol.17, No.6, pp. 1113-1127, 2021, DOI:10.32604/fdmp.2021.017591 - 08 September 2021

Abstract A new design of a selective catalytic reduction (SCR) mixer called tornado was developed for a heavy-duty diesel engine to solve the urea deposition problem. A combination of CFD simulation and experimental studies was used to comprehensively evaluate the performance of the tornado mixer. According to the numerical simulations, this mixer can improve the front surface flow uniformity of the SCR carrier by 6.67% and the NH₃ distribution uniformity by 3.19% compared to a traditional mixer. Similarly, steady state SCR conversion efficiency test results have shown that the tornado mixer can increase the average SCR conversion More >