Speed of Sound Measurements of Binary Mixtures of trans-1,2-Difluoroethylene (R-1132(E)) with Difluoromethane (R-32) or 2,3,3,3-Tetrafluoropropene (R-1234yf)

IF 2 3区 工程技术 Q3 CHEMISTRY, MULTIDISCIPLINARY
Aaron J. Rowane*,  and , Elizabeth G. Rasmussen, 
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Abstract

The speed of sound of two binary mixtures containing 0.336 mole fraction trans-1,2-difluoroethylene (R-1132(E)) with difluoromethane (R-32) and 0.435 mole fraction R-1132(E) with 2,3,3,3-tetrafluoropropene (R-1234yf) was measured with a dual-path pulse-echo instrument. The speed of sound was measured along several pseudoisochores for each blend at temperatures ranging from 230 to 325 K for blends with R-32 and to 342 K for blends with R-1234yf. Measurements started at pressures just above each mixture’s bubble point pressure and were limited to 8 MPa to avoid potential disproportionation reactions of R-1132(E). The data were compared to multifluid models incorporating Helmholtz-energy-explicit equations of state (EOS) for each pure fluid. No binary interaction parameters for either the R-1132(E)/32 or R-1132(E)/1234yf system are currently available. Therefore, binary interaction parameters for chemically similar systems suggested by REFPROP version 10.0 were used. Deviations from the measured data to the EOS ranged from 5.5 to 11.0% for the R-1132(E)/32 system and from 0.4 to 1.8% for the R-1132(E)/1234yf system. These data will be used to refit the R-1132(E) EOS and fit mixture models for R-1132(E) blends with R-32 and R-1234yf.

Abstract Image

反式-1,2-二氟乙烯(R-1132(E))与二氟甲烷(R-32)或2,3,3,3-四氟丙烯(R-1234yf)二元混合物的声速测量
用双路脉冲回波仪测定了反式-1,2-二氟乙烯(R-1132(E))与二氟甲烷(R-32)的摩尔分数0.336,反式-1,2-二氟乙烯(R-1132(E))与2,3,3,3-四氟丙烯(R-1234yf)二元混合物的声速。在与R-32共混物和R-1234yf共混物的温度范围为230 ~ 325 K和342 K时,沿着几个伪等线测量了每种共混物的声速。为了避免R-1132(E)的歧化反应,测量开始时的压力仅高于每种混合物的泡点压力,并限制在8 MPa。将这些数据与包含每种纯流体的亥姆霍兹-能量显式状态方程(EOS)的多流体模型进行比较。目前没有R-1132(E)/32或R-1132(E)/1234yf系统的二进制相互作用参数。因此,采用REFPROP 10.0版本建议的化学相似体系的二元相互作用参数。R-1132(E)/32系统的测量数据与EOS的偏差范围为5.5%至11.0%,R-1132(E)/1234yf系统的偏差范围为0.4至1.8%。这些数据将用于改装R-1132(E) EOS,并拟合R-1132(E)与R-32和R-1234yf的混合物模型。
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来源期刊
Journal of Chemical & Engineering Data
Journal of Chemical & Engineering Data 工程技术-工程:化工
CiteScore
5.20
自引率
19.20%
发文量
324
审稿时长
2.2 months
期刊介绍: The Journal of Chemical & Engineering Data is a monthly journal devoted to the publication of data obtained from both experiment and computation, which are viewed as complementary. It is the only American Chemical Society journal primarily concerned with articles containing data on the phase behavior and the physical, thermodynamic, and transport properties of well-defined materials, including complex mixtures of known compositions. While environmental and biological samples are of interest, their compositions must be known and reproducible. As a result, adsorption on natural product materials does not generally fit within the scope of Journal of Chemical & Engineering Data.
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