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Showing papers in "Fuel in 2021"


Journal ArticleDOI
01 Feb 2021-Fuel
TL;DR: In this article, a review focuses on pretreatment techniques for improving sewage sludge AD, which include mechanical, chemical, thermal, and biological processes, and various pretreatment process effects are discussed in terms of advantages and disadvantages.

183 citations


Journal ArticleDOI
15 Mar 2021-Fuel
TL;DR: In this article, the authors highlight several aspects of lipase-catalyzed biodiesel production and discuss the possible solutions to circumvent the well-known problems inherent in these systems, such as the low-stability and the pricing of biocatalysts.

153 citations


Journal ArticleDOI
01 Jan 2021-Fuel
TL;DR: In this paper, a review of pyrolytic processes employed for the conversion of algal biomass into biochar and bio-oil production is presented. And the challenges arising out of using above-said pyroglysis methods were critically highlighted to pave the way to choose an appropriate pyro-lysis method for obtaining desirable quantity and quality of biooil from algae.

152 citations


Journal ArticleDOI
01 Feb 2021-Fuel
TL;DR: In this paper, the authors comprehensively review different effective techniques and controlling strategies used in the homogeneous charge compression ignition (HCCI) engine, and also summarize in the tables.

152 citations


Journal ArticleDOI
01 Feb 2021-Fuel
TL;DR: In this paper, the availability of various oil resources and the advancements in technology related to oil extraction are discussed, and the need to develop integrated process technologies for biodiesel production to make the process more economical is emphasized.

134 citations


Journal ArticleDOI
15 Mar 2021-Fuel
TL;DR: A comprehensive review of biobased biorefineries focusing on substrates, processes that include existing conventional and advanced biotechnologies approaches for its successful implementations on a large scale is presented in this article.

127 citations


Journal ArticleDOI
15 Feb 2021-Fuel
TL;DR: In this article, two types of demulsifiers are comprehensively reviewed and discussed, including types, influencing factors, demulsification mechanisms, and overdose effects of complex emulsions.

119 citations


Journal ArticleDOI
01 Mar 2021-Fuel
TL;DR: In this article, the authors comprehensively reviewed the biochar based catalyst for fuel production, and the reason for choosing biochar catalyst to fuel production was discussed and the mechanism by which the bio-char catalyst facilitates the fuel production were given for better understanding.

117 citations


Journal ArticleDOI
15 Apr 2021-Fuel
TL;DR: In this paper, the effects of Fe2O3 based diesel oxidation catalyst and selective catalytic reduction catalyst on the engine characteristic of diesel engine fueled with biodiesels and diesel in the experimental study were investigated.

116 citations


Journal ArticleDOI
01 Mar 2021-Fuel
TL;DR: In this article, advances in lignocellulosic pretreatment technologies for biofuels production are reviewed and critically discussed, and the pros and cons of various pretreatment methodologies as well as addresses the role and impact of different process parameters associated with the pretreatment process.

114 citations


Journal ArticleDOI
01 May 2021-Fuel
TL;DR: In this article, the impacts of biomass type and pyrolysis temperature on the physical and chemical properties of biochar, especially the effects on nitrogen (N) content and composition, were investigated.

Journal ArticleDOI
15 Oct 2021-Fuel
TL;DR: In this article, the authors summarized the three key research areas that required more attentions, they are; (a) valorization of lignin, cellulose, hemicellulose into value added products, (b) integrated biorefinery approach and process optimization; and (c) circular bioeconomy and its future perspective.

Journal ArticleDOI
15 Apr 2021-Fuel
TL;DR: Wang et al. as mentioned in this paper investigated the influence of long-time pressure water on the mineral content and pore structure of coal and found that water intrusion makes a decrease in the types and contents of mineral in coal.

Journal ArticleDOI
15 Jan 2021-Fuel
TL;DR: In this paper, an improved model was constructed to calculate the effective diffusion coefficient of gas in a water-saturated coal core by considering both the gas adsorption in residual pore and the gas dissolution in pore water.

Journal ArticleDOI
01 May 2021-Fuel
TL;DR: In this article, a Ni@SiO2@CeO2 catalyst was synthesized by coating ceria on surface of NiO2 to reduce carbon deposition, which significantly reduced carbon deposition and enhanced stability of methane dry reforming reaction.

Journal ArticleDOI
01 Sep 2021-Fuel
TL;DR: In this paper, the challenges, opportunities and future potentials with ammonia as a carbon-free fuel, and covers recent technological solutions to overcome the barriers with the production, storage and usage of green ammonia.

Journal ArticleDOI
01 Jan 2021-Fuel
TL;DR: In this paper, the core-shell structured magnetic composites were firstly prepared by coating of silica shells on magnetic Fe3O4 nanoparticles, and then grafting copolymerization of dual acidic ionic liquids (ILs, 1-vinyl-3-(3-sulfopropyl)imidazolium hydrogen sulfate as an monomer and 1.4-butanediyl)-3,3′-bis-1-vinylimidazoliu hydrogen sulfates as a cross-linker agent) on the

Journal ArticleDOI
15 Feb 2021-Fuel
TL;DR: In this article, the flame stabilization technologies for micro- and meso-scale combustors are divided into three categories, namely, single flame stabilisation technologies, combined flame stabilization technologies, and other flame stabilizing technologies that could not be included in the former two.

Journal ArticleDOI
Zhanming Chen1, Jingjing He1, Hao Chen1, Limin Geng1, Peng Zhang1 
15 Nov 2021-Fuel
TL;DR: In this article, a comparative study on the effects of energy substitution ratio (ESR) on the combustion characteristics and performance of a dual fuel engine fueled with diesel/methanol, diesel/ethanol and diesel/n-butanol was conducted experimentally.

Journal ArticleDOI
01 Feb 2021-Fuel
TL;DR: In this paper, the authors focused on the conversion of various microalgal; and cyanobacterial biomasses into bio-oil, and solid char products through pyrolysis and hydrothermal liquefaction.

Journal ArticleDOI
01 Feb 2021-Fuel
TL;DR: In this article, the physicochemical properties, fatty acids distribution, stability of jatropha oil are discussed in detail, and the change in fatty acid profile affects the fuel properties, performance and emissions of diesel engines operated on jatroha biodiesel.

Journal ArticleDOI
01 Mar 2021-Fuel
TL;DR: In this article, the effect of hydrogen addition on the auto-ignition of ammonia at high temperatures was analyzed using both the Glarborg Model and Otomo Model to interpret the interactions between ammonia and hydrogen during the high temperature autoignition.

Journal ArticleDOI
01 Oct 2021-Fuel
TL;DR: In this paper, the authors proposed a mechanism implemented on the four abovementioned categories and their respective limitations are presented, and future recommendations to optimize the greenhouse gases utilization system for up-scaling purpose is also highlighted.

Journal ArticleDOI
15 Jan 2021-Fuel
TL;DR: In this article, a review of different cultivation conditions such as temperature, light intensity, and pH for enhancing lipid accumulation for green fuel production is presented, and the impact of the cultivation conditions on the lipid yield and growth of algae with respect to biofuel production is discussed.

Journal ArticleDOI
01 Feb 2021-Fuel
TL;DR: In this article, a series of environmentally friendly and low-cost seaweed-derived biochar catalysts (SDBCs) were prepared and examined through ex-situ catalytic pyrolysis of Enteromorpha clathrate.

Journal ArticleDOI
15 Jun 2021-Fuel
TL;DR: In this article, a dual Z-scheme NiFe2O4/Bi2WO6/AgI (NBA) composite was used for photocatalytic degradation of ciprofloxacin.

Journal ArticleDOI
01 May 2021-Fuel
TL;DR: In this paper, a review summarizes the different routes of biological hydrogen production including biophotolysis, indirect photolysis and dark fermentation, photofermentation, and microbial electrolysis.

Journal ArticleDOI
01 Jan 2021-Fuel
TL;DR: In this article, the pore structures of three different rank coals sampled from China (anthracite, bituminous coal and lignite) were characterized by CO2 and N2 adsorption.

Journal ArticleDOI
15 Jan 2021-Fuel
TL;DR: In this article, the co-pyrolysis characteristics of sewage sludge (SS) and peanut shell (PS) under nitrogen atmosphere were studied by thermogravimetric -FTIR and artificial neural network (ANN).

Journal ArticleDOI
15 Mar 2021-Fuel
TL;DR: The water gas shift reaction (WGSR) is a moderately exothermic reaction between carbon monoxide and steam to form carbon dioxide and hydrogen in typical industrial applications as discussed by the authors.