Papers by Keyword: CO2

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Authors: Manabu Tanaka, Tashiro Shinichi, Takayuki Kashima, John J. Lowke, Anthony B. Murphy
Authors: Pei Bian, Dong Ying Ju
Abstract: Low temperature sintering NiCuZn ferrite was employed at most cases due to its co-firability with Ag (below 960°C). The purpose of this study is to fabricate NiCuZn ferrite sintered body with high-strength and high-frequency magnetic properties. Following is the procedure: firstly, NiCuZn ferrite powder was synthesized under CO2 atmosphere at 500°C from the mixed doxalate synthesized by liquid phase deposition method; then a small amount of boric acid [H3BO3] was added to the powder, and the NiCuZn ferrite powder compact was prepared with Newton press and CIP methods; finally, NiCuZn ferrite sintered body was fabricated by sintering at 900°C under CO2 atmosphere. By this method, NiCuZn ferrite sintered body with 0.5 mass% boric acid was obtained, which was additive with strength 340 MPa, high frequency applied scope below 20MHz and initial permeability 38.
Authors: Hui Yu, Xue Li Gao, Bao Wei Su, Cong Jie Gao
Abstract: Sea water desalination methods are widely used. Thermal process and membrane process are the commonly used methods .However, both thermal and membrane processes are faced scaling trend. In this study, a new approach for the management of sea water and capture of CO2, where ammoniated sea water is reacted with carbon dioxide, has been investigated. The effects of reaction temperature, reaction time, and excess ammonia were assessed. The experimental results indicated that the optimum reaction temperature was about 20 °C and the optimum NH3H2O used amount was 4.8g/200ml. The results indicated that the new approach can reduce the sea water hardness and at the same time, contribute to reducing CO2 emissions.
Authors: Bo Su, Yong Chen Song, Yu Liu, Yue Chao Zhao, Min Hao, Xin Huan Zhou, Jun Lin Chen
Abstract: CO2 injection into oil reservoirs can both enhance oil recovery and realize CO2 geological sequestration. The gas diffusion coefficient of CO2 in oil and water is a very important factor for EOR. This paper developed a simple experimental technique for measuring the CO2 diffusion coefficient in heavy oil. In this paper, we find the relationship between initial pressure and diffusion coefficient and equilibrium pressure at the same temperature.
Authors: Xiao Zhang
Abstract: The paper proposes a two-step evaluation process to assess the developed driving cycles for carbon dioxide emissions. The first step is to compare the driving operating mode distributions from developed driving cycles with real world ones. The second step is to predict the carbon dioxide (CO2) emissions by using the developed driving cycles under the latest version of MOVES, MOVES2010 framework, which are then compared with and evaluated by the real-world CO2 emissions. Evaluation results show that the driving cycles developed by the driving operating mode distribution measure result in more accurate CO2 emission estimations.
Authors: Bing Tao Liu, Yong Hong Shui, Guang Yu Zhu
Abstract: The adsorption of CO2 on a non-woven fabric with activated carbon before and after dipping treatment has been studied. It has been found that dipping treatment with Na2CO3 and KOH can improve the adsorption of CO2 on the non-woven fabric. KOH is a better dipping agent than Na2CO3. High temperature is beneficial to the adsorption of CO2 on the fabric dipped with KOH. With increasing relative humidity, the adsorption efficiency is decreased for both original fabric and that dipped with KOH. Increasing adsorption layer number can improve adsorption efficiency. However, when the number of adsorption layers exceeds 3 the increased amplitude of adsorption efficiency is obviously reduced, while the pressure loss of the system is remarkably increased.
Authors: Hua Deng, Hong Hong Yi, Xiao Long Tang, Ping Ning, Qiong Fen Yu
Abstract: Adsorption equilibrium data for CO2 and N2 on coal-based activated carbon were obtained at 323.15, 348.15, 363.15 K and at partial pressures from 100 Pa to 82425 Pa by a volumetric apparatus. Lower temperature is helpful for the adsorption. It was observed the saturation loadings at 323.15 K are 0.3 mmolg-1, 0.057mmolg-1 for CO2 and N2, respectively. The Langmuir and Sips equations were used to correlate the experimental data. It was found that the Sips equation is more accurate to describe the adsorption behavior of both gases on activated carbon. Henry’s constant was calculated, it proves that activated carbon has a high selectivity on CO2 than N2, the maximum separation index is 5.5.
Authors: Ji Xiang Deng, Zheng Wang
Abstract: Different perspectives play an important role in framing Chinas climate policy. The model we have introduced is designed to access the influence of different perspectives on the allocation of carbon emission rights. Base on the model, China is divided into eight regions, and allocation of the budget to regions is computed based on a weighted mix of indicators such as population size and GDP. The result shows that the parameter values of the model are regarded as being related to specific perspectives. When base year, principle weight or discount changed, each region exhibits different characteristics under different scenarios.
Authors: Shuang Lei Zhang, Chang Jun Li, Ji Chuan Zhang, Jun Li
Abstract: As more and more natural gas fields with high content of CO2 have been exploited, it is a strategic significance to capture and take good use of the waste gas while reducing CO2 emission to atmosphere. Pipelines have been identified as the primary means of transporting CO2 from point-of-capture to storage sites, but there is little published work on the economics of CO2 pipeline transport study either exclude transport costs or assume a given cost per tonne of CO2 in addition to capture costs.This paper simulates the CO2 pipeline transport processes of different diameters by liquid and supercritical phase, and estimates the total costs of different transport cases. By comparing the economic value of different cases comprehensively, the optimal transport option for Dongfang 1-1 gas field EGR program has been analyzed.
Authors: Nabilah Zaini, K.S.N. Kamarudin
Abstract: The increase concentration of CO2 in the atmosphere is linked with global climate change. Among the technology options used for CO2 capture, there is a growing interest in using adsorption method for separation process. Inspired by the most applicable technology of amine–based chemical absorption for capturing CO2, the development of amine–functionalized kenaf based adsorbent has been proposed in this study. The incorporation of amine functional group (MEA and TEPA) on kenaf was conducted via wet impregnation method. The characterization was carried out by using FESEM and FTIR. The CO2 adsorption equilibrium study have been conducted and further described by Langmuir and Freundlich isotherm equation models at temperature of 0, 25 and 50oC. Result presented shows that Freundlich isotherm model fits the experimental data for raw kenaf and amine–modified kenaf. It was indicated by the values of R2. Additionally, results for each sample show the adsorption favourability since the values of KL is less than 1 and the magnitude of Freundlich (n) is greater than 1. Finally, this study revealed that the amine–modified kenaf could become another potential adsorbent for CO2 separation.
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