超声波作用下CO2水合物浆体的分解特性

山东科技大学土木工程与建筑学院 • 山东省土木工程防灾减灾重点实验室

超声波;水合物浆体;分解;正交试验;响应面法

Analysis of decomposition characteristics of CO2 hydrate slurry under ultrasonic action
SUN Shicai,ZHAO Yanping,GU Linlin,ZHANG Rundong,CUI Junhao,LIN Haifei,PAN Tong

College of Civil Engineering and Architecture, Shandong University of Science and Technology//Shandong Key Laboratory of Civil Engineering Disaster Prevention and Mitigation

ultrasonic wave, hydrate slurry, decomposition, orthogonal experiment, response surface method

DOI: 10.6047/j.issn.1000-8241.2025.01.004

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【目的】目前水合物开采效率较低,难以达到商业标准,而超声波在介质中传播时产生的一系列超声效应有助于水合物分解。探究超声波功率比、作用时间、间隙时间等多因素交互作用下水合物分解特性对超声波在水合物开采过程中的应用具有重要意义。【方法】通过单因素实验研究了超声波功率比、总作用时间、单次作用时间及间隙时间对水合物浆体分解特性的影响。在此基础上,采用正交试验与响应面法试验确定了促进CO2水合物浆体分解的最佳超声波参数组合。【结果】功率比越大、总作用时间越长、单次作用时间越长、间隙时间越短,CO2水合物浆体分解产气量越多。上述各因素对促进水合物浆体分解产气的影响从大到小依次为总作用时间、单次作用时间、间隙时间、超声波功率比,各因素间交互作用也会对超声最佳参数组合的选取产生影响。采用正交试验选取的最佳超声波参数组合为功率比70.0%、总作用时间8.0min、单次作用时间8.0s、间隙时间2.0s,此时最大产气量为0.07mol;采用响应面法试验选取的最佳超声波参数组合为功率比67.7%、总作用时间7.5min、单次作用时间7.2s、间隙时间5.0s,此时最大预测产气量为0.065mol。【结论】研究成果可丰富超声波参数对水合物浆体分解特性影响规律的相关研究,并为超声辅助水合物开采提供重要的理论基础。(图8表6,参[30]
[Objective] Given the challenge of meeting commercial standards for hydrate extraction due to low efficiency, ultrasonic waves can be employed to catalyze hydrate decomposition through various effects generated during their propagation in the medium. Exploring the characteristics of hydrate decomposition under multiple influencing factors with various interactive relationships, such as ultrasonic power ratios, action durations, and intervals, is of great significance to promoting the application of ultrasonic waves in the hydrate mining process. [Methods] Single-factor experiments were conducted to investigate the effects of ultrasonic power ratios, total action durations, single action durations, and intervals on the decomposition characteristics of hydrate slurry. Building on this, the optimal combinations of ultrasonic parameters for promoting the decomposition of CO2 hydrate slurry were determined through orthogonal experiments and experiments based on the response surface methodology. [Results] Gas production from the decomposition of CO2 hydrate slurry increased with higher power ratios, longer total action durations, longer single action durations, and shorter intervals. The effects of these factors on gas production were identified in descending order as follows: total action durations, single action durations, intervals, and ultrasonic power ratios. The interactive relationships among the factors were found to have influence on the selection of ultrasonic parameters for optimal combinations. Specifically, the optimal combination identified from orthogonal experiments consisted of a power ratio of 70.0%, total action duration of 8.0 min, single action duration of 8.0 s, and an interval of 2.0 s, resulting in a maximum gas production rate of 0.07 mol. In contrast, the optimal combination determined through response surface methodology included a power ratio of 67.7%, total action duration of 7.5 min, single action duration of 7.2 s, and an interval of 5.0 s, yielding a maximum predicted gas production rate of 0.065 mol. [Conclusion] The research results provide additional insights to supplement existing studies on the influence of ultrasonic parameters on the decomposition characteristics of hydrate slurry, establishing a crucial theoretical foundation for ultrasonic-assisted hydrate mining. (8 Figures, 6 Tables, 30 References)
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