What is the difference between LNG and CNG?

[Delaney]

LNG and CNG have the following differences: 1. Meanings of CNG and LNG: 1. CNG stands for Compressed Natural Gas, which is natural gas pressurized and stored in containers in a gaseous state. 2. LNG is short for Liquefied Natural Gas. 2. Production and manufacturing: 1. CNG filling stations include mother stations, standard stations, and daughter stations. Mother stations typically extract gas from high-pressure pipelines and require processes such as dehydration, drying, compression, and storage. 2. Formation of LNG: Natural gas produced from gas fields is first purified and then liquefied at ultra-low temperatures (-162°C) under normal pressure to form liquefied natural gas. The critical temperature between gas and liquid states of LNG under normal pressure is -162°C. 3. Different storage states and containers: 1. CNG is stored as high-pressure gas in pressure vessels, usually at 20MPa. 2. LNG is stored in pressure vessels at low temperatures, typically around -160°C. 3. The amount stored in pressure vessels of the same water volume differs under standard conditions. 4. Different usage methods: 1. Before supplying to users, CNG requires decompression, pressure regulation, and metering and cannot be used directly. 2. Before supplying to users, LNG requires vaporization, pressure regulation, and metering and cannot be used directly.