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Reducing the greenhouse gas emissions from heat and power sector as well as from other energy-intensive industrial applications is of paramount importance today. Various carbon capture technologies can be applied to reduce the CO2 emissions from the polluting process industries. This paper is presenting, through various illustrative coal-based examples, the carbon capture, utilisation and storage...
Authigenic clay (Aclay) is common in grain-supported tight reservoirs and exerts a primary control on reservoir’s percolation properties. In this study, we investigated the impacts of Aclay on pore connectivity, pore size distribution (PSD), and rock compressibility, to the resulting impacts on storage and percolation in order to arrive at a genetic classification of tight sandstones. QEMSCAN® combined...
The molecular dynamics (MD) simulation was used in this study to explain the microscopic process of asphalt self-healing and investigate the influence of temperature on the self-healing capability of asphalt binders. Asphalt average molecular structure models of four types of neat asphalt binders were constructed firstly and a three-dimensional (3D) micro-crack model was further introduced to simulate...
The utilization of Zhundong coal has given rise to serious ash-related issues mainly because of its high-alkali characteristic, partly similar to biomass with high-potassium content. The chemical properties of such coals and biomass may have marked impacts on reactivity and ash fouling. However, the correlations of different chemical properties of high-alkali solid fuels have been seldom investigated,...
A facile seeding-growth protocol was employed to immobilize nanostructured ZnO with nanorod and nanosheet morphologies (ZnO-nR and ZnO-nS, respectively) on cordierite-mullite honeycomb support. By varying the hexamethylenetetramine (HMTA) concentration, Zn precursor, and number of growth cycles during synthesis, different nanorod sizes, nanosheets textures and ZnO layers were obtained. The ZnO-loaded...
The first coalification jump (FCJ) has a significant impact on low-rank coal reservoir heterogeneity, and is of great importance for coalbed methane (CBM) development. Here, a series of experiments were performed for 10 coal samples collected from eastern Junggar Basin, to compare the material composition, pore structure and adsorption capacity of lignite and candle coal. Contrast with the candle...
The destabilization of oil-in-water (O/W) emulsions with average oil droplet sizes of less than 2μm is important. Herein, hyperbranched poly(amido amine) (h-PAMAM) is successfully designed and synthesized by controlling the ratio of methyl acrylate (MA) to ethylenediamine (EDA) to enable the demulsifier to break microdroplets. The investigations on the effects of dosage, temperature, and settling...
The liquid fuel evaporation rate, especially for aviation kerosene, is important in both aero-engine combustion chamber design process and spray combustion numerical simulation modeling, while the evaporation rate in high temperature stationary and convective environment is lack of both experimental data validation and theoretical analysis studies. In this paper, firstly the common kerosene and aviation...
The northern foot of Bogda Mountains in Junggar Basin, Northwest China hosts thick organic-rich shale deposits in the Permian Lucaogou Formation. The Lucaogou Formation consists of the lower member and upper member. To assess the thermal maturity of Lucaogou Formation organic-rich shale in this area, the maturity parameters from organic geochemistry of twenty-four samples selected from JZK well are...
Knowing the controllability properties of reactions may be critical in the design phase of controlled systems. Analysis of the controllability properties of reactions is done here with control inputs being the temperature of the reaction, and the inflow rates of some species. The analysis is based on the Lie-algebra generated by the vector fields related to the differential equation of the reaction...
There is still a need for active, selective and stable heterogeneous catalysts for the synthesis of biodiesel. In this work, magnesium-aluminium hydrotalcites with Mg/Al molar ratios within the 1.5–5 range were synthesized by coprecipitation and used as transesterification catalysts for the synthesis of biodiesel. The mixed oxides obtained after calcination recovered the hydrotalcite structure in...
The characteristics of excited CH radical (CH∗) chemiluminescence and blackbody radiation in opposed impinging coal-water slurry (CWS) flames were investigated in this paper based on a bench-scale opposed multi-burner (OMB) gasifier. CH∗ chemiluminescence is a significant radical species in flame spectral diagnostics, and blackbody radiation can reflect the spatial distribution of solid particles...
In order to evaluate the influence of pellet quality classes, as defined by the ISO 17225-2, particulate matter and gaseous pollutants were characterized for different class fueled pellets in the emissions of a stove at partial and nominal load. Total suspended particulate (TSP) was sampled with a dilution system, then characterized for total carbon (TC), inorganic carbon (IC), water soluble organic...
The Late Permian Da-long Formation shale in southern China is regarded asa shale gas reservoir target. However, the lack of fundamental data for shale gas reservoirs increases the difficulty of gas exploration. To understand the pore structure characteristics of these shales, a series of experiments was conducted on Da-long Formation samples collected from the Shangsi Section in the Guangyuan area...
Energy storage becomes increasingly important in balancing electricity supply and demand due to the rise of intermittent power generation from renewable sources. The compressed air energy storage (CAES) system as one of the large scale (>100MW) energy storage technologies has been commercially deployed in Germany and the USA. However, the efficiency of current commercial CAES plants still needs...
A meta-model based multi-objective optimization endeavor was undertaken in the present work to investigate the potential of the off-line model based calibration technique to extend the actual CRDI-CNG dual-fuel experimental investigations in determining the possibility of unearthing viable potential trade-off domains hitherto unexplored by the constraints of resources, cost and time warranted by an...
Shale oil samples were obtained from the pyrolysis of six Chinese representative oil shales obtained from different locations and were divided into <300°C and >300°C fractions according to their boiling points. Chinese shale oils were similar in their high atomic H/C ratio. Huadian shale oil possessed the lowest density and viscosity. <300°C fractions of shale oils were subjected to acidic/basic...
In this work a series of bamboo-derived biochars rich in micropores (its micropore ratio as high as 76%) were prepared by ZnCl2 chemical activation of bamboo processing residues, further modified with oxidation using concentrated HNO3, and characterized by N2 adsorption, XRD, Raman spectra, elemental analysis and Boehm titration. Their adsorptive desulfurization (ADS) performances were examined using...
In-cylinder combustion visualization and engine-out soot particle emissions were investigated in an optical diesel engine fueled with low octane gasoline. Single injection strategy with an early injection timing (−30 CAD aTDC) was employed to achieve partially premixed combustion (PPC) condition. A high-speed color camera was used to record the combustion images for 150 cycles. The regulated emission...
The precise division into “three zones” of coal spontaneous combustion in the gob plays a key role for coal fire fighting. This paper presents three-dimensional distribution maps and contour plots for the gases and temperature in the gob by the method of griddata interpolation according to the data (O2, CO, CO2, CH4, and temperature) acquired from in-situ test, and the variation of gases and temperature...
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